package org.hl7.fhir.r4.model;

/*
  Copyright (c) 2011+, HL7, Inc.
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without modification, 
  are permitted provided that the following conditions are met:
  
   * Redistributions of source code must retain the above copyright notice, this 
     list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright notice, 
     this list of conditions and the following disclaimer in the documentation 
     and/or other materials provided with the distribution.
   * Neither the name of HL7 nor the names of its contributors may be used to 
     endorse or promote products derived from this software without specific 
     prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
  POSSIBILITY OF SUCH DAMAGE.
  
*/

// Generated on Thu, Sep 13, 2018 09:04-0400 for FHIR v3.5.0

import java.util.*;

import org.hl7.fhir.utilities.Utilities;
import ca.uhn.fhir.model.api.annotation.ResourceDef;
import ca.uhn.fhir.model.api.annotation.SearchParamDefinition;
import ca.uhn.fhir.model.api.annotation.Child;
import ca.uhn.fhir.model.api.annotation.ChildOrder;
import ca.uhn.fhir.model.api.annotation.Description;
import ca.uhn.fhir.model.api.annotation.Block;
import org.hl7.fhir.instance.model.api.*;
import org.hl7.fhir.exceptions.FHIRException;
/**
 * A booking of a healthcare event among patient(s), practitioner(s), related person(s) and/or device(s) for a specific date/time. This may result in one or more Encounter(s).
 */
@ResourceDef(name="Appointment", profile="http://hl7.org/fhir/StructureDefinition/Appointment")
public class Appointment extends DomainResource {

    public enum AppointmentStatus {
        /**
         * None of the participant(s) have finalized their acceptance of the appointment request, and the start/end time might not be set yet.
         */
        PROPOSED, 
        /**
         * Some or all of the participant(s) have not finalized their acceptance of the appointment request.
         */
        PENDING, 
        /**
         * All participant(s) have been considered and the appointment is confirmed to go ahead at the date/times specified.
         */
        BOOKED, 
        /**
         * The patient/patients has/have arrived and is/are waiting to be seen.
         */
        ARRIVED, 
        /**
         * This appointment has completed and may have resulted in an encounter.
         */
        FULFILLED, 
        /**
         * The appointment has been cancelled.
         */
        CANCELLED, 
        /**
         * Some or all of the participant(s) have not/did not appear for the appointment (usually the patient).
         */
        NOSHOW, 
        /**
         * This instance should not have been part of this patient's medical record.
         */
        ENTEREDINERROR, 
        /**
         * When checked in, all pre-encounter administrative work is complete, and the encounter may begin. (where multiple patients are involved, they are all present).
         */
        CHECKEDIN, 
        /**
         * added to help the parsers with the generic types
         */
        NULL;
        public static AppointmentStatus fromCode(String codeString) throws FHIRException {
            if (codeString == null || "".equals(codeString))
                return null;
        if ("proposed".equals(codeString))
          return PROPOSED;
        if ("pending".equals(codeString))
          return PENDING;
        if ("booked".equals(codeString))
          return BOOKED;
        if ("arrived".equals(codeString))
          return ARRIVED;
        if ("fulfilled".equals(codeString))
          return FULFILLED;
        if ("cancelled".equals(codeString))
          return CANCELLED;
        if ("noshow".equals(codeString))
          return NOSHOW;
        if ("entered-in-error".equals(codeString))
          return ENTEREDINERROR;
        if ("checked-in".equals(codeString))
          return CHECKEDIN;
        if (Configuration.isAcceptInvalidEnums())
          return null;
        else
          throw new FHIRException("Unknown AppointmentStatus code '"+codeString+"'");
        }
        public String toCode() {
          switch (this) {
            case PROPOSED: return "proposed";
            case PENDING: return "pending";
            case BOOKED: return "booked";
            case ARRIVED: return "arrived";
            case FULFILLED: return "fulfilled";
            case CANCELLED: return "cancelled";
            case NOSHOW: return "noshow";
            case ENTEREDINERROR: return "entered-in-error";
            case CHECKEDIN: return "checked-in";
            default: return "?";
          }
        }
        public String getSystem() {
          switch (this) {
            case PROPOSED: return "http://hl7.org/fhir/appointmentstatus";
            case PENDING: return "http://hl7.org/fhir/appointmentstatus";
            case BOOKED: return "http://hl7.org/fhir/appointmentstatus";
            case ARRIVED: return "http://hl7.org/fhir/appointmentstatus";
            case FULFILLED: return "http://hl7.org/fhir/appointmentstatus";
            case CANCELLED: return "http://hl7.org/fhir/appointmentstatus";
            case NOSHOW: return "http://hl7.org/fhir/appointmentstatus";
            case ENTEREDINERROR: return "http://hl7.org/fhir/appointmentstatus";
            case CHECKEDIN: return "http://hl7.org/fhir/appointmentstatus";
            default: return "?";
          }
        }
        public String getDefinition() {
          switch (this) {
            case PROPOSED: return "None of the participant(s) have finalized their acceptance of the appointment request, and the start/end time might not be set yet.";
            case PENDING: return "Some or all of the participant(s) have not finalized their acceptance of the appointment request.";
            case BOOKED: return "All participant(s) have been considered and the appointment is confirmed to go ahead at the date/times specified.";
            case ARRIVED: return "The patient/patients has/have arrived and is/are waiting to be seen.";
            case FULFILLED: return "This appointment has completed and may have resulted in an encounter.";
            case CANCELLED: return "The appointment has been cancelled.";
            case NOSHOW: return "Some or all of the participant(s) have not/did not appear for the appointment (usually the patient).";
            case ENTEREDINERROR: return "This instance should not have been part of this patient's medical record.";
            case CHECKEDIN: return "When checked in, all pre-encounter administrative work is complete, and the encounter may begin. (where multiple patients are involved, they are all present).";
            default: return "?";
          }
        }
        public String getDisplay() {
          switch (this) {
            case PROPOSED: return "Proposed";
            case PENDING: return "Pending";
            case BOOKED: return "Booked";
            case ARRIVED: return "Arrived";
            case FULFILLED: return "Fulfilled";
            case CANCELLED: return "Cancelled";
            case NOSHOW: return "No Show";
            case ENTEREDINERROR: return "Entered in error";
            case CHECKEDIN: return "Checked In";
            default: return "?";
          }
        }
    }

  public static class AppointmentStatusEnumFactory implements EnumFactory<AppointmentStatus> {
    public AppointmentStatus fromCode(String codeString) throws IllegalArgumentException {
      if (codeString == null || "".equals(codeString))
            if (codeString == null || "".equals(codeString))
                return null;
        if ("proposed".equals(codeString))
          return AppointmentStatus.PROPOSED;
        if ("pending".equals(codeString))
          return AppointmentStatus.PENDING;
        if ("booked".equals(codeString))
          return AppointmentStatus.BOOKED;
        if ("arrived".equals(codeString))
          return AppointmentStatus.ARRIVED;
        if ("fulfilled".equals(codeString))
          return AppointmentStatus.FULFILLED;
        if ("cancelled".equals(codeString))
          return AppointmentStatus.CANCELLED;
        if ("noshow".equals(codeString))
          return AppointmentStatus.NOSHOW;
        if ("entered-in-error".equals(codeString))
          return AppointmentStatus.ENTEREDINERROR;
        if ("checked-in".equals(codeString))
          return AppointmentStatus.CHECKEDIN;
        throw new IllegalArgumentException("Unknown AppointmentStatus code '"+codeString+"'");
        }
        public Enumeration<AppointmentStatus> fromType(Base code) throws FHIRException {
          if (code == null)
            return null;
          if (code.isEmpty())
            return new Enumeration<AppointmentStatus>(this);
          String codeString = ((PrimitiveType) code).asStringValue();
          if (codeString == null || "".equals(codeString))
            return null;
        if ("proposed".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.PROPOSED);
        if ("pending".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.PENDING);
        if ("booked".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.BOOKED);
        if ("arrived".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.ARRIVED);
        if ("fulfilled".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.FULFILLED);
        if ("cancelled".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.CANCELLED);
        if ("noshow".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.NOSHOW);
        if ("entered-in-error".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.ENTEREDINERROR);
        if ("checked-in".equals(codeString))
          return new Enumeration<AppointmentStatus>(this, AppointmentStatus.CHECKEDIN);
        throw new FHIRException("Unknown AppointmentStatus code '"+codeString+"'");
        }
    public String toCode(AppointmentStatus code) {
      if (code == AppointmentStatus.PROPOSED)
        return "proposed";
      if (code == AppointmentStatus.PENDING)
        return "pending";
      if (code == AppointmentStatus.BOOKED)
        return "booked";
      if (code == AppointmentStatus.ARRIVED)
        return "arrived";
      if (code == AppointmentStatus.FULFILLED)
        return "fulfilled";
      if (code == AppointmentStatus.CANCELLED)
        return "cancelled";
      if (code == AppointmentStatus.NOSHOW)
        return "noshow";
      if (code == AppointmentStatus.ENTEREDINERROR)
        return "entered-in-error";
      if (code == AppointmentStatus.CHECKEDIN)
        return "checked-in";
      return "?";
      }
    public String toSystem(AppointmentStatus code) {
      return code.getSystem();
      }
    }

    public enum ParticipantRequired {
        /**
         * The participant is required to attend the appointment.
         */
        REQUIRED, 
        /**
         * The participant may optionally attend the appointment.
         */
        OPTIONAL, 
        /**
         * The participant is excluded from the appointment, and might not be informed of the appointment taking place. (Appointment is about them, not for them - such as 2 doctors discussing results about a patient's test).
         */
        INFORMATIONONLY, 
        /**
         * added to help the parsers with the generic types
         */
        NULL;
        public static ParticipantRequired fromCode(String codeString) throws FHIRException {
            if (codeString == null || "".equals(codeString))
                return null;
        if ("required".equals(codeString))
          return REQUIRED;
        if ("optional".equals(codeString))
          return OPTIONAL;
        if ("information-only".equals(codeString))
          return INFORMATIONONLY;
        if (Configuration.isAcceptInvalidEnums())
          return null;
        else
          throw new FHIRException("Unknown ParticipantRequired code '"+codeString+"'");
        }
        public String toCode() {
          switch (this) {
            case REQUIRED: return "required";
            case OPTIONAL: return "optional";
            case INFORMATIONONLY: return "information-only";
            default: return "?";
          }
        }
        public String getSystem() {
          switch (this) {
            case REQUIRED: return "http://hl7.org/fhir/participantrequired";
            case OPTIONAL: return "http://hl7.org/fhir/participantrequired";
            case INFORMATIONONLY: return "http://hl7.org/fhir/participantrequired";
            default: return "?";
          }
        }
        public String getDefinition() {
          switch (this) {
            case REQUIRED: return "The participant is required to attend the appointment.";
            case OPTIONAL: return "The participant may optionally attend the appointment.";
            case INFORMATIONONLY: return "The participant is excluded from the appointment, and might not be informed of the appointment taking place. (Appointment is about them, not for them - such as 2 doctors discussing results about a patient's test).";
            default: return "?";
          }
        }
        public String getDisplay() {
          switch (this) {
            case REQUIRED: return "Required";
            case OPTIONAL: return "Optional";
            case INFORMATIONONLY: return "Information Only";
            default: return "?";
          }
        }
    }

  public static class ParticipantRequiredEnumFactory implements EnumFactory<ParticipantRequired> {
    public ParticipantRequired fromCode(String codeString) throws IllegalArgumentException {
      if (codeString == null || "".equals(codeString))
            if (codeString == null || "".equals(codeString))
                return null;
        if ("required".equals(codeString))
          return ParticipantRequired.REQUIRED;
        if ("optional".equals(codeString))
          return ParticipantRequired.OPTIONAL;
        if ("information-only".equals(codeString))
          return ParticipantRequired.INFORMATIONONLY;
        throw new IllegalArgumentException("Unknown ParticipantRequired code '"+codeString+"'");
        }
        public Enumeration<ParticipantRequired> fromType(Base code) throws FHIRException {
          if (code == null)
            return null;
          if (code.isEmpty())
            return new Enumeration<ParticipantRequired>(this);
          String codeString = ((PrimitiveType) code).asStringValue();
          if (codeString == null || "".equals(codeString))
            return null;
        if ("required".equals(codeString))
          return new Enumeration<ParticipantRequired>(this, ParticipantRequired.REQUIRED);
        if ("optional".equals(codeString))
          return new Enumeration<ParticipantRequired>(this, ParticipantRequired.OPTIONAL);
        if ("information-only".equals(codeString))
          return new Enumeration<ParticipantRequired>(this, ParticipantRequired.INFORMATIONONLY);
        throw new FHIRException("Unknown ParticipantRequired code '"+codeString+"'");
        }
    public String toCode(ParticipantRequired code) {
      if (code == ParticipantRequired.REQUIRED)
        return "required";
      if (code == ParticipantRequired.OPTIONAL)
        return "optional";
      if (code == ParticipantRequired.INFORMATIONONLY)
        return "information-only";
      return "?";
      }
    public String toSystem(ParticipantRequired code) {
      return code.getSystem();
      }
    }

    public enum ParticipationStatus {
        /**
         * The participant has accepted the appointment.
         */
        ACCEPTED, 
        /**
         * The participant has declined the appointment and will not participate in the appointment.
         */
        DECLINED, 
        /**
         * The participant has  tentatively accepted the appointment. This could be automatically created by a system and requires further processing before it can be accepted. There is no commitment that attendance will occur.
         */
        TENTATIVE, 
        /**
         * The participant needs to indicate if they accept the appointment by changing this status to one of the other statuses.
         */
        NEEDSACTION, 
        /**
         * added to help the parsers with the generic types
         */
        NULL;
        public static ParticipationStatus fromCode(String codeString) throws FHIRException {
            if (codeString == null || "".equals(codeString))
                return null;
        if ("accepted".equals(codeString))
          return ACCEPTED;
        if ("declined".equals(codeString))
          return DECLINED;
        if ("tentative".equals(codeString))
          return TENTATIVE;
        if ("needs-action".equals(codeString))
          return NEEDSACTION;
        if (Configuration.isAcceptInvalidEnums())
          return null;
        else
          throw new FHIRException("Unknown ParticipationStatus code '"+codeString+"'");
        }
        public String toCode() {
          switch (this) {
            case ACCEPTED: return "accepted";
            case DECLINED: return "declined";
            case TENTATIVE: return "tentative";
            case NEEDSACTION: return "needs-action";
            default: return "?";
          }
        }
        public String getSystem() {
          switch (this) {
            case ACCEPTED: return "http://hl7.org/fhir/participationstatus";
            case DECLINED: return "http://hl7.org/fhir/participationstatus";
            case TENTATIVE: return "http://hl7.org/fhir/participationstatus";
            case NEEDSACTION: return "http://hl7.org/fhir/participationstatus";
            default: return "?";
          }
        }
        public String getDefinition() {
          switch (this) {
            case ACCEPTED: return "The participant has accepted the appointment.";
            case DECLINED: return "The participant has declined the appointment and will not participate in the appointment.";
            case TENTATIVE: return "The participant has  tentatively accepted the appointment. This could be automatically created by a system and requires further processing before it can be accepted. There is no commitment that attendance will occur.";
            case NEEDSACTION: return "The participant needs to indicate if they accept the appointment by changing this status to one of the other statuses.";
            default: return "?";
          }
        }
        public String getDisplay() {
          switch (this) {
            case ACCEPTED: return "Accepted";
            case DECLINED: return "Declined";
            case TENTATIVE: return "Tentative";
            case NEEDSACTION: return "Needs Action";
            default: return "?";
          }
        }
    }

  public static class ParticipationStatusEnumFactory implements EnumFactory<ParticipationStatus> {
    public ParticipationStatus fromCode(String codeString) throws IllegalArgumentException {
      if (codeString == null || "".equals(codeString))
            if (codeString == null || "".equals(codeString))
                return null;
        if ("accepted".equals(codeString))
          return ParticipationStatus.ACCEPTED;
        if ("declined".equals(codeString))
          return ParticipationStatus.DECLINED;
        if ("tentative".equals(codeString))
          return ParticipationStatus.TENTATIVE;
        if ("needs-action".equals(codeString))
          return ParticipationStatus.NEEDSACTION;
        throw new IllegalArgumentException("Unknown ParticipationStatus code '"+codeString+"'");
        }
        public Enumeration<ParticipationStatus> fromType(Base code) throws FHIRException {
          if (code == null)
            return null;
          if (code.isEmpty())
            return new Enumeration<ParticipationStatus>(this);
          String codeString = ((PrimitiveType) code).asStringValue();
          if (codeString == null || "".equals(codeString))
            return null;
        if ("accepted".equals(codeString))
          return new Enumeration<ParticipationStatus>(this, ParticipationStatus.ACCEPTED);
        if ("declined".equals(codeString))
          return new Enumeration<ParticipationStatus>(this, ParticipationStatus.DECLINED);
        if ("tentative".equals(codeString))
          return new Enumeration<ParticipationStatus>(this, ParticipationStatus.TENTATIVE);
        if ("needs-action".equals(codeString))
          return new Enumeration<ParticipationStatus>(this, ParticipationStatus.NEEDSACTION);
        throw new FHIRException("Unknown ParticipationStatus code '"+codeString+"'");
        }
    public String toCode(ParticipationStatus code) {
      if (code == ParticipationStatus.ACCEPTED)
        return "accepted";
      if (code == ParticipationStatus.DECLINED)
        return "declined";
      if (code == ParticipationStatus.TENTATIVE)
        return "tentative";
      if (code == ParticipationStatus.NEEDSACTION)
        return "needs-action";
      return "?";
      }
    public String toSystem(ParticipationStatus code) {
      return code.getSystem();
      }
    }

    @Block()
    public static class AppointmentParticipantComponent extends BackboneElement implements IBaseBackboneElement {
        /**
         * Role of participant in the appointment.
         */
        @Child(name = "type", type = {CodeableConcept.class}, order=1, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=true)
        @Description(shortDefinition="Role of participant in the appointment", formalDefinition="Role of participant in the appointment." )
        @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://hl7.org/fhir/ValueSet/encounter-participant-type")
        protected List<CodeableConcept> type;

        /**
         * A Person, Location/HealthcareService or Device that is participating in the appointment.
         */
        @Child(name = "actor", type = {Patient.class, Practitioner.class, RelatedPerson.class, Device.class, HealthcareService.class, Location.class}, order=2, min=0, max=1, modifier=false, summary=true)
        @Description(shortDefinition="Person, Location/HealthcareService or Device", formalDefinition="A Person, Location/HealthcareService or Device that is participating in the appointment." )
        protected Reference actor;

        /**
         * The actual object that is the target of the reference (A Person, Location/HealthcareService or Device that is participating in the appointment.)
         */
        protected Resource actorTarget;

        /**
         * Whether this participant is required to be present at the meeting. This covers a use-case where two doctors need to meet to discuss the results for a specific patient, and the patient is not required to be present.
         */
        @Child(name = "required", type = {CodeType.class}, order=3, min=0, max=1, modifier=false, summary=true)
        @Description(shortDefinition="required | optional | information-only", formalDefinition="Whether this participant is required to be present at the meeting. This covers a use-case where two doctors need to meet to discuss the results for a specific patient, and the patient is not required to be present." )
        @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://hl7.org/fhir/ValueSet/participantrequired")
        protected Enumeration<ParticipantRequired> required;

        /**
         * Participation status of the actor.
         */
        @Child(name = "status", type = {CodeType.class}, order=4, min=1, max=1, modifier=false, summary=true)
        @Description(shortDefinition="accepted | declined | tentative | needs-action", formalDefinition="Participation status of the actor." )
        @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://hl7.org/fhir/ValueSet/participationstatus")
        protected Enumeration<ParticipationStatus> status;

        /**
         * Participation period of the actor.
         */
        @Child(name = "period", type = {Period.class}, order=5, min=0, max=1, modifier=false, summary=false)
        @Description(shortDefinition="Participation period of the actor", formalDefinition="Participation period of the actor." )
        protected Period period;

        private static final long serialVersionUID = -1939292177L;

    /**
     * Constructor
     */
      public AppointmentParticipantComponent() {
        super();
      }

    /**
     * Constructor
     */
      public AppointmentParticipantComponent(Enumeration<ParticipationStatus> status) {
        super();
        this.status = status;
      }

        /**
         * @return {@link #type} (Role of participant in the appointment.)
         */
        public List<CodeableConcept> getType() { 
          if (this.type == null)
            this.type = new ArrayList<CodeableConcept>();
          return this.type;
        }

        /**
         * @return Returns a reference to <code>this</code> for easy method chaining
         */
        public AppointmentParticipantComponent setType(List<CodeableConcept> theType) { 
          this.type = theType;
          return this;
        }

        public boolean hasType() { 
          if (this.type == null)
            return false;
          for (CodeableConcept item : this.type)
            if (!item.isEmpty())
              return true;
          return false;
        }

        public CodeableConcept addType() { //3
          CodeableConcept t = new CodeableConcept();
          if (this.type == null)
            this.type = new ArrayList<CodeableConcept>();
          this.type.add(t);
          return t;
        }

        public AppointmentParticipantComponent addType(CodeableConcept t) { //3
          if (t == null)
            return this;
          if (this.type == null)
            this.type = new ArrayList<CodeableConcept>();
          this.type.add(t);
          return this;
        }

        /**
         * @return The first repetition of repeating field {@link #type}, creating it if it does not already exist
         */
        public CodeableConcept getTypeFirstRep() { 
          if (getType().isEmpty()) {
            addType();
          }
          return getType().get(0);
        }

        /**
         * @return {@link #actor} (A Person, Location/HealthcareService or Device that is participating in the appointment.)
         */
        public Reference getActor() { 
          if (this.actor == null)
            if (Configuration.errorOnAutoCreate())
              throw new Error("Attempt to auto-create AppointmentParticipantComponent.actor");
            else if (Configuration.doAutoCreate())
              this.actor = new Reference(); // cc
          return this.actor;
        }

        public boolean hasActor() { 
          return this.actor != null && !this.actor.isEmpty();
        }

        /**
         * @param value {@link #actor} (A Person, Location/HealthcareService or Device that is participating in the appointment.)
         */
        public AppointmentParticipantComponent setActor(Reference value) { 
          this.actor = value;
          return this;
        }

        /**
         * @return {@link #actor} The actual object that is the target of the reference. The reference library doesn't populate this, but you can use it to hold the resource if you resolve it. (A Person, Location/HealthcareService or Device that is participating in the appointment.)
         */
        public Resource getActorTarget() { 
          return this.actorTarget;
        }

        /**
         * @param value {@link #actor} The actual object that is the target of the reference. The reference library doesn't use these, but you can use it to hold the resource if you resolve it. (A Person, Location/HealthcareService or Device that is participating in the appointment.)
         */
        public AppointmentParticipantComponent setActorTarget(Resource value) { 
          this.actorTarget = value;
          return this;
        }

        /**
         * @return {@link #required} (Whether this participant is required to be present at the meeting. This covers a use-case where two doctors need to meet to discuss the results for a specific patient, and the patient is not required to be present.). This is the underlying object with id, value and extensions. The accessor "getRequired" gives direct access to the value
         */
        public Enumeration<ParticipantRequired> getRequiredElement() { 
          if (this.required == null)
            if (Configuration.errorOnAutoCreate())
              throw new Error("Attempt to auto-create AppointmentParticipantComponent.required");
            else if (Configuration.doAutoCreate())
              this.required = new Enumeration<ParticipantRequired>(new ParticipantRequiredEnumFactory()); // bb
          return this.required;
        }

        public boolean hasRequiredElement() { 
          return this.required != null && !this.required.isEmpty();
        }

        public boolean hasRequired() { 
          return this.required != null && !this.required.isEmpty();
        }

        /**
         * @param value {@link #required} (Whether this participant is required to be present at the meeting. This covers a use-case where two doctors need to meet to discuss the results for a specific patient, and the patient is not required to be present.). This is the underlying object with id, value and extensions. The accessor "getRequired" gives direct access to the value
         */
        public AppointmentParticipantComponent setRequiredElement(Enumeration<ParticipantRequired> value) { 
          this.required = value;
          return this;
        }

        /**
         * @return Whether this participant is required to be present at the meeting. This covers a use-case where two doctors need to meet to discuss the results for a specific patient, and the patient is not required to be present.
         */
        public ParticipantRequired getRequired() { 
          return this.required == null ? null : this.required.getValue();
        }

        /**
         * @param value Whether this participant is required to be present at the meeting. This covers a use-case where two doctors need to meet to discuss the results for a specific patient, and the patient is not required to be present.
         */
        public AppointmentParticipantComponent setRequired(ParticipantRequired value) { 
          if (value == null)
            this.required = null;
          else {
            if (this.required == null)
              this.required = new Enumeration<ParticipantRequired>(new ParticipantRequiredEnumFactory());
            this.required.setValue(value);
          }
          return this;
        }

        /**
         * @return {@link #status} (Participation status of the actor.). This is the underlying object with id, value and extensions. The accessor "getStatus" gives direct access to the value
         */
        public Enumeration<ParticipationStatus> getStatusElement() { 
          if (this.status == null)
            if (Configuration.errorOnAutoCreate())
              throw new Error("Attempt to auto-create AppointmentParticipantComponent.status");
            else if (Configuration.doAutoCreate())
              this.status = new Enumeration<ParticipationStatus>(new ParticipationStatusEnumFactory()); // bb
          return this.status;
        }

        public boolean hasStatusElement() { 
          return this.status != null && !this.status.isEmpty();
        }

        public boolean hasStatus() { 
          return this.status != null && !this.status.isEmpty();
        }

        /**
         * @param value {@link #status} (Participation status of the actor.). This is the underlying object with id, value and extensions. The accessor "getStatus" gives direct access to the value
         */
        public AppointmentParticipantComponent setStatusElement(Enumeration<ParticipationStatus> value) { 
          this.status = value;
          return this;
        }

        /**
         * @return Participation status of the actor.
         */
        public ParticipationStatus getStatus() { 
          return this.status == null ? null : this.status.getValue();
        }

        /**
         * @param value Participation status of the actor.
         */
        public AppointmentParticipantComponent setStatus(ParticipationStatus value) { 
            if (this.status == null)
              this.status = new Enumeration<ParticipationStatus>(new ParticipationStatusEnumFactory());
            this.status.setValue(value);
          return this;
        }

        /**
         * @return {@link #period} (Participation period of the actor.)
         */
        public Period getPeriod() { 
          if (this.period == null)
            if (Configuration.errorOnAutoCreate())
              throw new Error("Attempt to auto-create AppointmentParticipantComponent.period");
            else if (Configuration.doAutoCreate())
              this.period = new Period(); // cc
          return this.period;
        }

        public boolean hasPeriod() { 
          return this.period != null && !this.period.isEmpty();
        }

        /**
         * @param value {@link #period} (Participation period of the actor.)
         */
        public AppointmentParticipantComponent setPeriod(Period value) { 
          this.period = value;
          return this;
        }

        protected void listChildren(List<Property> children) {
          super.listChildren(children);
          children.add(new Property("type", "CodeableConcept", "Role of participant in the appointment.", 0, java.lang.Integer.MAX_VALUE, type));
          children.add(new Property("actor", "Reference(Patient|Practitioner|RelatedPerson|Device|HealthcareService|Location)", "A Person, Location/HealthcareService or Device that is participating in the appointment.", 0, 1, actor));
          children.add(new Property("required", "code", "Whether this participant is required to be present at the meeting. This covers a use-case where two doctors need to meet to discuss the results for a specific patient, and the patient is not required to be present.", 0, 1, required));
          children.add(new Property("status", "code", "Participation status of the actor.", 0, 1, status));
          children.add(new Property("period", "Period", "Participation period of the actor.", 0, 1, period));
        }

        @Override
        public Property getNamedProperty(int _hash, String _name, boolean _checkValid) throws FHIRException {
          switch (_hash) {
          case 3575610: /*type*/  return new Property("type", "CodeableConcept", "Role of participant in the appointment.", 0, java.lang.Integer.MAX_VALUE, type);
          case 92645877: /*actor*/  return new Property("actor", "Reference(Patient|Practitioner|RelatedPerson|Device|HealthcareService|Location)", "A Person, Location/HealthcareService or Device that is participating in the appointment.", 0, 1, actor);
          case -393139297: /*required*/  return new Property("required", "code", "Whether this participant is required to be present at the meeting. This covers a use-case where two doctors need to meet to discuss the results for a specific patient, and the patient is not required to be present.", 0, 1, required);
          case -892481550: /*status*/  return new Property("status", "code", "Participation status of the actor.", 0, 1, status);
          case -991726143: /*period*/  return new Property("period", "Period", "Participation period of the actor.", 0, 1, period);
          default: return super.getNamedProperty(_hash, _name, _checkValid);
          }

        }

      @Override
      public Base[] getProperty(int hash, String name, boolean checkValid) throws FHIRException {
        switch (hash) {
        case 3575610: /*type*/ return this.type == null ? new Base[0] : this.type.toArray(new Base[this.type.size()]); // CodeableConcept
        case 92645877: /*actor*/ return this.actor == null ? new Base[0] : new Base[] {this.actor}; // Reference
        case -393139297: /*required*/ return this.required == null ? new Base[0] : new Base[] {this.required}; // Enumeration<ParticipantRequired>
        case -892481550: /*status*/ return this.status == null ? new Base[0] : new Base[] {this.status}; // Enumeration<ParticipationStatus>
        case -991726143: /*period*/ return this.period == null ? new Base[0] : new Base[] {this.period}; // Period
        default: return super.getProperty(hash, name, checkValid);
        }

      }

      @Override
      public Base setProperty(int hash, String name, Base value) throws FHIRException {
        switch (hash) {
        case 3575610: // type
          this.getType().add(castToCodeableConcept(value)); // CodeableConcept
          return value;
        case 92645877: // actor
          this.actor = castToReference(value); // Reference
          return value;
        case -393139297: // required
          value = new ParticipantRequiredEnumFactory().fromType(castToCode(value));
          this.required = (Enumeration) value; // Enumeration<ParticipantRequired>
          return value;
        case -892481550: // status
          value = new ParticipationStatusEnumFactory().fromType(castToCode(value));
          this.status = (Enumeration) value; // Enumeration<ParticipationStatus>
          return value;
        case -991726143: // period
          this.period = castToPeriod(value); // Period
          return value;
        default: return super.setProperty(hash, name, value);
        }

      }

      @Override
      public Base setProperty(String name, Base value) throws FHIRException {
        if (name.equals("type")) {
          this.getType().add(castToCodeableConcept(value));
        } else if (name.equals("actor")) {
          this.actor = castToReference(value); // Reference
        } else if (name.equals("required")) {
          value = new ParticipantRequiredEnumFactory().fromType(castToCode(value));
          this.required = (Enumeration) value; // Enumeration<ParticipantRequired>
        } else if (name.equals("status")) {
          value = new ParticipationStatusEnumFactory().fromType(castToCode(value));
          this.status = (Enumeration) value; // Enumeration<ParticipationStatus>
        } else if (name.equals("period")) {
          this.period = castToPeriod(value); // Period
        } else
          return super.setProperty(name, value);
        return value;
      }

      @Override
      public Base makeProperty(int hash, String name) throws FHIRException {
        switch (hash) {
        case 3575610:  return addType(); 
        case 92645877:  return getActor(); 
        case -393139297:  return getRequiredElement();
        case -892481550:  return getStatusElement();
        case -991726143:  return getPeriod(); 
        default: return super.makeProperty(hash, name);
        }

      }

      @Override
      public String[] getTypesForProperty(int hash, String name) throws FHIRException {
        switch (hash) {
        case 3575610: /*type*/ return new String[] {"CodeableConcept"};
        case 92645877: /*actor*/ return new String[] {"Reference"};
        case -393139297: /*required*/ return new String[] {"code"};
        case -892481550: /*status*/ return new String[] {"code"};
        case -991726143: /*period*/ return new String[] {"Period"};
        default: return super.getTypesForProperty(hash, name);
        }

      }

      @Override
      public Base addChild(String name) throws FHIRException {
        if (name.equals("type")) {
          return addType();
        }
        else if (name.equals("actor")) {
          this.actor = new Reference();
          return this.actor;
        }
        else if (name.equals("required")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.required");
        }
        else if (name.equals("status")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.status");
        }
        else if (name.equals("period")) {
          this.period = new Period();
          return this.period;
        }
        else
          return super.addChild(name);
      }

      public AppointmentParticipantComponent copy() {
        AppointmentParticipantComponent dst = new AppointmentParticipantComponent();
        copyValues(dst);
        if (type != null) {
          dst.type = new ArrayList<CodeableConcept>();
          for (CodeableConcept i : type)
            dst.type.add(i.copy());
        };
        dst.actor = actor == null ? null : actor.copy();
        dst.required = required == null ? null : required.copy();
        dst.status = status == null ? null : status.copy();
        dst.period = period == null ? null : period.copy();
        return dst;
      }

      @Override
      public boolean equalsDeep(Base other_) {
        if (!super.equalsDeep(other_))
          return false;
        if (!(other_ instanceof AppointmentParticipantComponent))
          return false;
        AppointmentParticipantComponent o = (AppointmentParticipantComponent) other_;
        return compareDeep(type, o.type, true) && compareDeep(actor, o.actor, true) && compareDeep(required, o.required, true)
           && compareDeep(status, o.status, true) && compareDeep(period, o.period, true);
      }

      @Override
      public boolean equalsShallow(Base other_) {
        if (!super.equalsShallow(other_))
          return false;
        if (!(other_ instanceof AppointmentParticipantComponent))
          return false;
        AppointmentParticipantComponent o = (AppointmentParticipantComponent) other_;
        return compareValues(required, o.required, true) && compareValues(status, o.status, true);
      }

      public boolean isEmpty() {
        return super.isEmpty() && ca.uhn.fhir.util.ElementUtil.isEmpty(type, actor, required, status
          , period);
      }

  public String fhirType() {
    return "Appointment.participant";

  }

  }

    /**
     * This records identifiers associated with this appointment concern that are defined by business processes and/or used to refer to it when a direct URL reference to the resource itself is not appropriate (e.g. in CDA documents, or in written / printed documentation).
     */
    @Child(name = "identifier", type = {Identifier.class}, order=0, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=true)
    @Description(shortDefinition="External Ids for this item", formalDefinition="This records identifiers associated with this appointment concern that are defined by business processes and/or used to refer to it when a direct URL reference to the resource itself is not appropriate (e.g. in CDA documents, or in written / printed documentation)." )
    protected List<Identifier> identifier;

    /**
     * The overall status of the Appointment. Each of the participants has their own participation status which indicates their involvement in the process, however this status indicates the shared status.
     */
    @Child(name = "status", type = {CodeType.class}, order=1, min=1, max=1, modifier=true, summary=true)
    @Description(shortDefinition="proposed | pending | booked | arrived | fulfilled | cancelled | noshow | entered-in-error | checked-in", formalDefinition="The overall status of the Appointment. Each of the participants has their own participation status which indicates their involvement in the process, however this status indicates the shared status." )
    @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://hl7.org/fhir/ValueSet/appointmentstatus")
    protected Enumeration<AppointmentStatus> status;

    /**
     * A broad categorization of the service that is to be performed during this appointment.
     */
    @Child(name = "serviceCategory", type = {CodeableConcept.class}, order=2, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=true)
    @Description(shortDefinition="A broad categorization of the service that is to be performed during this appointment", formalDefinition="A broad categorization of the service that is to be performed during this appointment." )
    @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://hl7.org/fhir/ValueSet/service-category")
    protected List<CodeableConcept> serviceCategory;

    /**
     * The specific service that is to be performed during this appointment.
     */
    @Child(name = "serviceType", type = {CodeableConcept.class}, order=3, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=true)
    @Description(shortDefinition="The specific service that is to be performed during this appointment", formalDefinition="The specific service that is to be performed during this appointment." )
    @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://hl7.org/fhir/ValueSet/service-type")
    protected List<CodeableConcept> serviceType;

    /**
     * The specialty of a practitioner that would be required to perform the service requested in this appointment.
     */
    @Child(name = "specialty", type = {CodeableConcept.class}, order=4, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=true)
    @Description(shortDefinition="The specialty of a practitioner that would be required to perform the service requested in this appointment", formalDefinition="The specialty of a practitioner that would be required to perform the service requested in this appointment." )
    @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://hl7.org/fhir/ValueSet/c80-practice-codes")
    protected List<CodeableConcept> specialty;

    /**
     * The style of appointment or patient that has been booked in the slot (not service type).
     */
    @Child(name = "appointmentType", type = {CodeableConcept.class}, order=5, min=0, max=1, modifier=false, summary=true)
    @Description(shortDefinition="The style of appointment or patient that has been booked in the slot (not service type)", formalDefinition="The style of appointment or patient that has been booked in the slot (not service type)." )
    @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://terminology.hl7.org/ValueSet/v2-0276")
    protected CodeableConcept appointmentType;

    /**
     * The reason that this appointment is being scheduled. This is more clinical than administrative.
     */
    @Child(name = "reason", type = {CodeableConcept.class}, order=6, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=true)
    @Description(shortDefinition="Reason this appointment is scheduled", formalDefinition="The reason that this appointment is being scheduled. This is more clinical than administrative." )
    @ca.uhn.fhir.model.api.annotation.Binding(valueSet="http://hl7.org/fhir/ValueSet/encounter-reason")
    protected List<CodeableConcept> reason;

    /**
     * Reason the appointment has been scheduled to take place, as specified using information from another resource. When the patient arrives and the encounter begins it may be used as the admission diagnosis. The indication will typically be a Condition (with other resources referenced in the evidence.detail), or a Procedure.
     */
    @Child(name = "indication", type = {Condition.class, Procedure.class}, order=7, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=false)
    @Description(shortDefinition="Reason the appointment is to takes place (resource)", formalDefinition="Reason the appointment has been scheduled to take place, as specified using information from another resource. When the patient arrives and the encounter begins it may be used as the admission diagnosis. The indication will typically be a Condition (with other resources referenced in the evidence.detail), or a Procedure." )
    protected List<Reference> indication;
    /**
     * The actual objects that are the target of the reference (Reason the appointment has been scheduled to take place, as specified using information from another resource. When the patient arrives and the encounter begins it may be used as the admission diagnosis. The indication will typically be a Condition (with other resources referenced in the evidence.detail), or a Procedure.)
     */
    protected List<Resource> indicationTarget;


    /**
     * The priority of the appointment. Can be used to make informed decisions if needing to re-prioritize appointments. (The iCal Standard specifies 0 as undefined, 1 as highest, 9 as lowest priority).
     */
    @Child(name = "priority", type = {UnsignedIntType.class}, order=8, min=0, max=1, modifier=false, summary=false)
    @Description(shortDefinition="Used to make informed decisions if needing to re-prioritize", formalDefinition="The priority of the appointment. Can be used to make informed decisions if needing to re-prioritize appointments. (The iCal Standard specifies 0 as undefined, 1 as highest, 9 as lowest priority)." )
    protected UnsignedIntType priority;

    /**
     * The brief description of the appointment as would be shown on a subject line in a meeting request, or appointment list. Detailed or expanded information should be put in the comment field.
     */
    @Child(name = "description", type = {StringType.class}, order=9, min=0, max=1, modifier=false, summary=false)
    @Description(shortDefinition="Shown on a subject line in a meeting request, or appointment list", formalDefinition="The brief description of the appointment as would be shown on a subject line in a meeting request, or appointment list. Detailed or expanded information should be put in the comment field." )
    protected StringType description;

    /**
     * Additional information to support the appointment provided when making the appointment.
     */
    @Child(name = "supportingInformation", type = {Reference.class}, order=10, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=false)
    @Description(shortDefinition="Additional information to support the appointment", formalDefinition="Additional information to support the appointment provided when making the appointment." )
    protected List<Reference> supportingInformation;
    /**
     * The actual objects that are the target of the reference (Additional information to support the appointment provided when making the appointment.)
     */
    protected List<Resource> supportingInformationTarget;


    /**
     * Date/Time that the appointment is to take place.
     */
    @Child(name = "start", type = {InstantType.class}, order=11, min=0, max=1, modifier=false, summary=true)
    @Description(shortDefinition="When appointment is to take place", formalDefinition="Date/Time that the appointment is to take place." )
    protected InstantType start;

    /**
     * Date/Time that the appointment is to conclude.
     */
    @Child(name = "end", type = {InstantType.class}, order=12, min=0, max=1, modifier=false, summary=true)
    @Description(shortDefinition="When appointment is to conclude", formalDefinition="Date/Time that the appointment is to conclude." )
    protected InstantType end;

    /**
     * Number of minutes that the appointment is to take. This can be less than the duration between the start and end times.  For example, where the actual time of appointment is only an estimate or if a 30 minute appointment is being requested, but any time would work.  Also, if there is, for example, a planned 15 minute break in the middle of a long appointment, the duration may be 15 minutes less than the difference between the start and end.
     */
    @Child(name = "minutesDuration", type = {PositiveIntType.class}, order=13, min=0, max=1, modifier=false, summary=false)
    @Description(shortDefinition="Can be less than start/end (e.g. estimate)", formalDefinition="Number of minutes that the appointment is to take. This can be less than the duration between the start and end times.  For example, where the actual time of appointment is only an estimate or if a 30 minute appointment is being requested, but any time would work.  Also, if there is, for example, a planned 15 minute break in the middle of a long appointment, the duration may be 15 minutes less than the difference between the start and end." )
    protected PositiveIntType minutesDuration;

    /**
     * The slots from the participants' schedules that will be filled by the appointment.
     */
    @Child(name = "slot", type = {Slot.class}, order=14, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=false)
    @Description(shortDefinition="The slots that this appointment is filling", formalDefinition="The slots from the participants' schedules that will be filled by the appointment." )
    protected List<Reference> slot;
    /**
     * The actual objects that are the target of the reference (The slots from the participants' schedules that will be filled by the appointment.)
     */
    protected List<Slot> slotTarget;


    /**
     * The date that this appointment was initially created. This could be different to the meta.lastModified value on the initial entry, as this could have been before the resource was created on the FHIR server, and should remain unchanged over the lifespan of the appointment.
     */
    @Child(name = "created", type = {DateTimeType.class}, order=15, min=0, max=1, modifier=false, summary=false)
    @Description(shortDefinition="The date that this appointment was initially created", formalDefinition="The date that this appointment was initially created. This could be different to the meta.lastModified value on the initial entry, as this could have been before the resource was created on the FHIR server, and should remain unchanged over the lifespan of the appointment." )
    protected DateTimeType created;

    /**
     * Additional comments about the appointment.
     */
    @Child(name = "comment", type = {StringType.class}, order=16, min=0, max=1, modifier=false, summary=false)
    @Description(shortDefinition="Additional comments", formalDefinition="Additional comments about the appointment." )
    protected StringType comment;

    /**
     * While Appointment.comment contains information for internal use, Appointment.patientInstructions is used to capture patient facing information about the Appointment (e.g. please bring your referral or fast from 8pm night before).
     */
    @Child(name = "patientInstruction", type = {StringType.class}, order=17, min=0, max=1, modifier=false, summary=false)
    @Description(shortDefinition="Detailed information and instructions for the patient", formalDefinition="While Appointment.comment contains information for internal use, Appointment.patientInstructions is used to capture patient facing information about the Appointment (e.g. please bring your referral or fast from 8pm night before)." )
    protected StringType patientInstruction;

    /**
     * The service request this appointment is allocated to assess (e.g. incoming referral or procedure request).
     */
    @Child(name = "basedOn", type = {ServiceRequest.class}, order=18, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=false)
    @Description(shortDefinition="The service request this appointment is allocated to assess", formalDefinition="The service request this appointment is allocated to assess (e.g. incoming referral or procedure request)." )
    protected List<Reference> basedOn;
    /**
     * The actual objects that are the target of the reference (The service request this appointment is allocated to assess (e.g. incoming referral or procedure request).)
     */
    protected List<ServiceRequest> basedOnTarget;


    /**
     * List of participants involved in the appointment.
     */
    @Child(name = "participant", type = {}, order=19, min=1, max=Child.MAX_UNLIMITED, modifier=false, summary=false)
    @Description(shortDefinition="Participants involved in appointment", formalDefinition="List of participants involved in the appointment." )
    protected List<AppointmentParticipantComponent> participant;

    /**
     * A set of date ranges (potentially including times) that the appointment is preferred to be scheduled within. When using these values, the duration (usually in minutes) should be provided to indicate the length of the appointment to fill and populate the start/end times for the actual allocated time.
     */
    @Child(name = "requestedPeriod", type = {Period.class}, order=20, min=0, max=Child.MAX_UNLIMITED, modifier=false, summary=false)
    @Description(shortDefinition="Potential date/time interval(s) requested to allocate the appointment within", formalDefinition="A set of date ranges (potentially including times) that the appointment is preferred to be scheduled within. When using these values, the duration (usually in minutes) should be provided to indicate the length of the appointment to fill and populate the start/end times for the actual allocated time." )
    protected List<Period> requestedPeriod;

    private static final long serialVersionUID = -128096826L;

  /**
   * Constructor
   */
    public Appointment() {
      super();
    }

  /**
   * Constructor
   */
    public Appointment(Enumeration<AppointmentStatus> status) {
      super();
      this.status = status;
    }

    /**
     * @return {@link #identifier} (This records identifiers associated with this appointment concern that are defined by business processes and/or used to refer to it when a direct URL reference to the resource itself is not appropriate (e.g. in CDA documents, or in written / printed documentation).)
     */
    public List<Identifier> getIdentifier() { 
      if (this.identifier == null)
        this.identifier = new ArrayList<Identifier>();
      return this.identifier;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setIdentifier(List<Identifier> theIdentifier) { 
      this.identifier = theIdentifier;
      return this;
    }

    public boolean hasIdentifier() { 
      if (this.identifier == null)
        return false;
      for (Identifier item : this.identifier)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public Identifier addIdentifier() { //3
      Identifier t = new Identifier();
      if (this.identifier == null)
        this.identifier = new ArrayList<Identifier>();
      this.identifier.add(t);
      return t;
    }

    public Appointment addIdentifier(Identifier t) { //3
      if (t == null)
        return this;
      if (this.identifier == null)
        this.identifier = new ArrayList<Identifier>();
      this.identifier.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #identifier}, creating it if it does not already exist
     */
    public Identifier getIdentifierFirstRep() { 
      if (getIdentifier().isEmpty()) {
        addIdentifier();
      }
      return getIdentifier().get(0);
    }

    /**
     * @return {@link #status} (The overall status of the Appointment. Each of the participants has their own participation status which indicates their involvement in the process, however this status indicates the shared status.). This is the underlying object with id, value and extensions. The accessor "getStatus" gives direct access to the value
     */
    public Enumeration<AppointmentStatus> getStatusElement() { 
      if (this.status == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.status");
        else if (Configuration.doAutoCreate())
          this.status = new Enumeration<AppointmentStatus>(new AppointmentStatusEnumFactory()); // bb
      return this.status;
    }

    public boolean hasStatusElement() { 
      return this.status != null && !this.status.isEmpty();
    }

    public boolean hasStatus() { 
      return this.status != null && !this.status.isEmpty();
    }

    /**
     * @param value {@link #status} (The overall status of the Appointment. Each of the participants has their own participation status which indicates their involvement in the process, however this status indicates the shared status.). This is the underlying object with id, value and extensions. The accessor "getStatus" gives direct access to the value
     */
    public Appointment setStatusElement(Enumeration<AppointmentStatus> value) { 
      this.status = value;
      return this;
    }

    /**
     * @return The overall status of the Appointment. Each of the participants has their own participation status which indicates their involvement in the process, however this status indicates the shared status.
     */
    public AppointmentStatus getStatus() { 
      return this.status == null ? null : this.status.getValue();
    }

    /**
     * @param value The overall status of the Appointment. Each of the participants has their own participation status which indicates their involvement in the process, however this status indicates the shared status.
     */
    public Appointment setStatus(AppointmentStatus value) { 
        if (this.status == null)
          this.status = new Enumeration<AppointmentStatus>(new AppointmentStatusEnumFactory());
        this.status.setValue(value);
      return this;
    }

    /**
     * @return {@link #serviceCategory} (A broad categorization of the service that is to be performed during this appointment.)
     */
    public List<CodeableConcept> getServiceCategory() { 
      if (this.serviceCategory == null)
        this.serviceCategory = new ArrayList<CodeableConcept>();
      return this.serviceCategory;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setServiceCategory(List<CodeableConcept> theServiceCategory) { 
      this.serviceCategory = theServiceCategory;
      return this;
    }

    public boolean hasServiceCategory() { 
      if (this.serviceCategory == null)
        return false;
      for (CodeableConcept item : this.serviceCategory)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public CodeableConcept addServiceCategory() { //3
      CodeableConcept t = new CodeableConcept();
      if (this.serviceCategory == null)
        this.serviceCategory = new ArrayList<CodeableConcept>();
      this.serviceCategory.add(t);
      return t;
    }

    public Appointment addServiceCategory(CodeableConcept t) { //3
      if (t == null)
        return this;
      if (this.serviceCategory == null)
        this.serviceCategory = new ArrayList<CodeableConcept>();
      this.serviceCategory.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #serviceCategory}, creating it if it does not already exist
     */
    public CodeableConcept getServiceCategoryFirstRep() { 
      if (getServiceCategory().isEmpty()) {
        addServiceCategory();
      }
      return getServiceCategory().get(0);
    }

    /**
     * @return {@link #serviceType} (The specific service that is to be performed during this appointment.)
     */
    public List<CodeableConcept> getServiceType() { 
      if (this.serviceType == null)
        this.serviceType = new ArrayList<CodeableConcept>();
      return this.serviceType;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setServiceType(List<CodeableConcept> theServiceType) { 
      this.serviceType = theServiceType;
      return this;
    }

    public boolean hasServiceType() { 
      if (this.serviceType == null)
        return false;
      for (CodeableConcept item : this.serviceType)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public CodeableConcept addServiceType() { //3
      CodeableConcept t = new CodeableConcept();
      if (this.serviceType == null)
        this.serviceType = new ArrayList<CodeableConcept>();
      this.serviceType.add(t);
      return t;
    }

    public Appointment addServiceType(CodeableConcept t) { //3
      if (t == null)
        return this;
      if (this.serviceType == null)
        this.serviceType = new ArrayList<CodeableConcept>();
      this.serviceType.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #serviceType}, creating it if it does not already exist
     */
    public CodeableConcept getServiceTypeFirstRep() { 
      if (getServiceType().isEmpty()) {
        addServiceType();
      }
      return getServiceType().get(0);
    }

    /**
     * @return {@link #specialty} (The specialty of a practitioner that would be required to perform the service requested in this appointment.)
     */
    public List<CodeableConcept> getSpecialty() { 
      if (this.specialty == null)
        this.specialty = new ArrayList<CodeableConcept>();
      return this.specialty;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setSpecialty(List<CodeableConcept> theSpecialty) { 
      this.specialty = theSpecialty;
      return this;
    }

    public boolean hasSpecialty() { 
      if (this.specialty == null)
        return false;
      for (CodeableConcept item : this.specialty)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public CodeableConcept addSpecialty() { //3
      CodeableConcept t = new CodeableConcept();
      if (this.specialty == null)
        this.specialty = new ArrayList<CodeableConcept>();
      this.specialty.add(t);
      return t;
    }

    public Appointment addSpecialty(CodeableConcept t) { //3
      if (t == null)
        return this;
      if (this.specialty == null)
        this.specialty = new ArrayList<CodeableConcept>();
      this.specialty.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #specialty}, creating it if it does not already exist
     */
    public CodeableConcept getSpecialtyFirstRep() { 
      if (getSpecialty().isEmpty()) {
        addSpecialty();
      }
      return getSpecialty().get(0);
    }

    /**
     * @return {@link #appointmentType} (The style of appointment or patient that has been booked in the slot (not service type).)
     */
    public CodeableConcept getAppointmentType() { 
      if (this.appointmentType == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.appointmentType");
        else if (Configuration.doAutoCreate())
          this.appointmentType = new CodeableConcept(); // cc
      return this.appointmentType;
    }

    public boolean hasAppointmentType() { 
      return this.appointmentType != null && !this.appointmentType.isEmpty();
    }

    /**
     * @param value {@link #appointmentType} (The style of appointment or patient that has been booked in the slot (not service type).)
     */
    public Appointment setAppointmentType(CodeableConcept value) { 
      this.appointmentType = value;
      return this;
    }

    /**
     * @return {@link #reason} (The reason that this appointment is being scheduled. This is more clinical than administrative.)
     */
    public List<CodeableConcept> getReason() { 
      if (this.reason == null)
        this.reason = new ArrayList<CodeableConcept>();
      return this.reason;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setReason(List<CodeableConcept> theReason) { 
      this.reason = theReason;
      return this;
    }

    public boolean hasReason() { 
      if (this.reason == null)
        return false;
      for (CodeableConcept item : this.reason)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public CodeableConcept addReason() { //3
      CodeableConcept t = new CodeableConcept();
      if (this.reason == null)
        this.reason = new ArrayList<CodeableConcept>();
      this.reason.add(t);
      return t;
    }

    public Appointment addReason(CodeableConcept t) { //3
      if (t == null)
        return this;
      if (this.reason == null)
        this.reason = new ArrayList<CodeableConcept>();
      this.reason.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #reason}, creating it if it does not already exist
     */
    public CodeableConcept getReasonFirstRep() { 
      if (getReason().isEmpty()) {
        addReason();
      }
      return getReason().get(0);
    }

    /**
     * @return {@link #indication} (Reason the appointment has been scheduled to take place, as specified using information from another resource. When the patient arrives and the encounter begins it may be used as the admission diagnosis. The indication will typically be a Condition (with other resources referenced in the evidence.detail), or a Procedure.)
     */
    public List<Reference> getIndication() { 
      if (this.indication == null)
        this.indication = new ArrayList<Reference>();
      return this.indication;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setIndication(List<Reference> theIndication) { 
      this.indication = theIndication;
      return this;
    }

    public boolean hasIndication() { 
      if (this.indication == null)
        return false;
      for (Reference item : this.indication)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public Reference addIndication() { //3
      Reference t = new Reference();
      if (this.indication == null)
        this.indication = new ArrayList<Reference>();
      this.indication.add(t);
      return t;
    }

    public Appointment addIndication(Reference t) { //3
      if (t == null)
        return this;
      if (this.indication == null)
        this.indication = new ArrayList<Reference>();
      this.indication.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #indication}, creating it if it does not already exist
     */
    public Reference getIndicationFirstRep() { 
      if (getIndication().isEmpty()) {
        addIndication();
      }
      return getIndication().get(0);
    }

    /**
     * @deprecated Use Reference#setResource(IBaseResource) instead
     */
    @Deprecated
    public List<Resource> getIndicationTarget() { 
      if (this.indicationTarget == null)
        this.indicationTarget = new ArrayList<Resource>();
      return this.indicationTarget;
    }

    /**
     * @return {@link #priority} (The priority of the appointment. Can be used to make informed decisions if needing to re-prioritize appointments. (The iCal Standard specifies 0 as undefined, 1 as highest, 9 as lowest priority).). This is the underlying object with id, value and extensions. The accessor "getPriority" gives direct access to the value
     */
    public UnsignedIntType getPriorityElement() { 
      if (this.priority == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.priority");
        else if (Configuration.doAutoCreate())
          this.priority = new UnsignedIntType(); // bb
      return this.priority;
    }

    public boolean hasPriorityElement() { 
      return this.priority != null && !this.priority.isEmpty();
    }

    public boolean hasPriority() { 
      return this.priority != null && !this.priority.isEmpty();
    }

    /**
     * @param value {@link #priority} (The priority of the appointment. Can be used to make informed decisions if needing to re-prioritize appointments. (The iCal Standard specifies 0 as undefined, 1 as highest, 9 as lowest priority).). This is the underlying object with id, value and extensions. The accessor "getPriority" gives direct access to the value
     */
    public Appointment setPriorityElement(UnsignedIntType value) { 
      this.priority = value;
      return this;
    }

    /**
     * @return The priority of the appointment. Can be used to make informed decisions if needing to re-prioritize appointments. (The iCal Standard specifies 0 as undefined, 1 as highest, 9 as lowest priority).
     */
    public int getPriority() { 
      return this.priority == null || this.priority.isEmpty() ? 0 : this.priority.getValue();
    }

    /**
     * @param value The priority of the appointment. Can be used to make informed decisions if needing to re-prioritize appointments. (The iCal Standard specifies 0 as undefined, 1 as highest, 9 as lowest priority).
     */
    public Appointment setPriority(int value) { 
        if (this.priority == null)
          this.priority = new UnsignedIntType();
        this.priority.setValue(value);
      return this;
    }

    /**
     * @return {@link #description} (The brief description of the appointment as would be shown on a subject line in a meeting request, or appointment list. Detailed or expanded information should be put in the comment field.). This is the underlying object with id, value and extensions. The accessor "getDescription" gives direct access to the value
     */
    public StringType getDescriptionElement() { 
      if (this.description == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.description");
        else if (Configuration.doAutoCreate())
          this.description = new StringType(); // bb
      return this.description;
    }

    public boolean hasDescriptionElement() { 
      return this.description != null && !this.description.isEmpty();
    }

    public boolean hasDescription() { 
      return this.description != null && !this.description.isEmpty();
    }

    /**
     * @param value {@link #description} (The brief description of the appointment as would be shown on a subject line in a meeting request, or appointment list. Detailed or expanded information should be put in the comment field.). This is the underlying object with id, value and extensions. The accessor "getDescription" gives direct access to the value
     */
    public Appointment setDescriptionElement(StringType value) { 
      this.description = value;
      return this;
    }

    /**
     * @return The brief description of the appointment as would be shown on a subject line in a meeting request, or appointment list. Detailed or expanded information should be put in the comment field.
     */
    public String getDescription() { 
      return this.description == null ? null : this.description.getValue();
    }

    /**
     * @param value The brief description of the appointment as would be shown on a subject line in a meeting request, or appointment list. Detailed or expanded information should be put in the comment field.
     */
    public Appointment setDescription(String value) { 
      if (Utilities.noString(value))
        this.description = null;
      else {
        if (this.description == null)
          this.description = new StringType();
        this.description.setValue(value);
      }
      return this;
    }

    /**
     * @return {@link #supportingInformation} (Additional information to support the appointment provided when making the appointment.)
     */
    public List<Reference> getSupportingInformation() { 
      if (this.supportingInformation == null)
        this.supportingInformation = new ArrayList<Reference>();
      return this.supportingInformation;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setSupportingInformation(List<Reference> theSupportingInformation) { 
      this.supportingInformation = theSupportingInformation;
      return this;
    }

    public boolean hasSupportingInformation() { 
      if (this.supportingInformation == null)
        return false;
      for (Reference item : this.supportingInformation)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public Reference addSupportingInformation() { //3
      Reference t = new Reference();
      if (this.supportingInformation == null)
        this.supportingInformation = new ArrayList<Reference>();
      this.supportingInformation.add(t);
      return t;
    }

    public Appointment addSupportingInformation(Reference t) { //3
      if (t == null)
        return this;
      if (this.supportingInformation == null)
        this.supportingInformation = new ArrayList<Reference>();
      this.supportingInformation.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #supportingInformation}, creating it if it does not already exist
     */
    public Reference getSupportingInformationFirstRep() { 
      if (getSupportingInformation().isEmpty()) {
        addSupportingInformation();
      }
      return getSupportingInformation().get(0);
    }

    /**
     * @deprecated Use Reference#setResource(IBaseResource) instead
     */
    @Deprecated
    public List<Resource> getSupportingInformationTarget() { 
      if (this.supportingInformationTarget == null)
        this.supportingInformationTarget = new ArrayList<Resource>();
      return this.supportingInformationTarget;
    }

    /**
     * @return {@link #start} (Date/Time that the appointment is to take place.). This is the underlying object with id, value and extensions. The accessor "getStart" gives direct access to the value
     */
    public InstantType getStartElement() { 
      if (this.start == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.start");
        else if (Configuration.doAutoCreate())
          this.start = new InstantType(); // bb
      return this.start;
    }

    public boolean hasStartElement() { 
      return this.start != null && !this.start.isEmpty();
    }

    public boolean hasStart() { 
      return this.start != null && !this.start.isEmpty();
    }

    /**
     * @param value {@link #start} (Date/Time that the appointment is to take place.). This is the underlying object with id, value and extensions. The accessor "getStart" gives direct access to the value
     */
    public Appointment setStartElement(InstantType value) { 
      this.start = value;
      return this;
    }

    /**
     * @return Date/Time that the appointment is to take place.
     */
    public Date getStart() { 
      return this.start == null ? null : this.start.getValue();
    }

    /**
     * @param value Date/Time that the appointment is to take place.
     */
    public Appointment setStart(Date value) { 
      if (value == null)
        this.start = null;
      else {
        if (this.start == null)
          this.start = new InstantType();
        this.start.setValue(value);
      }
      return this;
    }

    /**
     * @return {@link #end} (Date/Time that the appointment is to conclude.). This is the underlying object with id, value and extensions. The accessor "getEnd" gives direct access to the value
     */
    public InstantType getEndElement() { 
      if (this.end == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.end");
        else if (Configuration.doAutoCreate())
          this.end = new InstantType(); // bb
      return this.end;
    }

    public boolean hasEndElement() { 
      return this.end != null && !this.end.isEmpty();
    }

    public boolean hasEnd() { 
      return this.end != null && !this.end.isEmpty();
    }

    /**
     * @param value {@link #end} (Date/Time that the appointment is to conclude.). This is the underlying object with id, value and extensions. The accessor "getEnd" gives direct access to the value
     */
    public Appointment setEndElement(InstantType value) { 
      this.end = value;
      return this;
    }

    /**
     * @return Date/Time that the appointment is to conclude.
     */
    public Date getEnd() { 
      return this.end == null ? null : this.end.getValue();
    }

    /**
     * @param value Date/Time that the appointment is to conclude.
     */
    public Appointment setEnd(Date value) { 
      if (value == null)
        this.end = null;
      else {
        if (this.end == null)
          this.end = new InstantType();
        this.end.setValue(value);
      }
      return this;
    }

    /**
     * @return {@link #minutesDuration} (Number of minutes that the appointment is to take. This can be less than the duration between the start and end times.  For example, where the actual time of appointment is only an estimate or if a 30 minute appointment is being requested, but any time would work.  Also, if there is, for example, a planned 15 minute break in the middle of a long appointment, the duration may be 15 minutes less than the difference between the start and end.). This is the underlying object with id, value and extensions. The accessor "getMinutesDuration" gives direct access to the value
     */
    public PositiveIntType getMinutesDurationElement() { 
      if (this.minutesDuration == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.minutesDuration");
        else if (Configuration.doAutoCreate())
          this.minutesDuration = new PositiveIntType(); // bb
      return this.minutesDuration;
    }

    public boolean hasMinutesDurationElement() { 
      return this.minutesDuration != null && !this.minutesDuration.isEmpty();
    }

    public boolean hasMinutesDuration() { 
      return this.minutesDuration != null && !this.minutesDuration.isEmpty();
    }

    /**
     * @param value {@link #minutesDuration} (Number of minutes that the appointment is to take. This can be less than the duration between the start and end times.  For example, where the actual time of appointment is only an estimate or if a 30 minute appointment is being requested, but any time would work.  Also, if there is, for example, a planned 15 minute break in the middle of a long appointment, the duration may be 15 minutes less than the difference between the start and end.). This is the underlying object with id, value and extensions. The accessor "getMinutesDuration" gives direct access to the value
     */
    public Appointment setMinutesDurationElement(PositiveIntType value) { 
      this.minutesDuration = value;
      return this;
    }

    /**
     * @return Number of minutes that the appointment is to take. This can be less than the duration between the start and end times.  For example, where the actual time of appointment is only an estimate or if a 30 minute appointment is being requested, but any time would work.  Also, if there is, for example, a planned 15 minute break in the middle of a long appointment, the duration may be 15 minutes less than the difference between the start and end.
     */
    public int getMinutesDuration() { 
      return this.minutesDuration == null || this.minutesDuration.isEmpty() ? 0 : this.minutesDuration.getValue();
    }

    /**
     * @param value Number of minutes that the appointment is to take. This can be less than the duration between the start and end times.  For example, where the actual time of appointment is only an estimate or if a 30 minute appointment is being requested, but any time would work.  Also, if there is, for example, a planned 15 minute break in the middle of a long appointment, the duration may be 15 minutes less than the difference between the start and end.
     */
    public Appointment setMinutesDuration(int value) { 
        if (this.minutesDuration == null)
          this.minutesDuration = new PositiveIntType();
        this.minutesDuration.setValue(value);
      return this;
    }

    /**
     * @return {@link #slot} (The slots from the participants' schedules that will be filled by the appointment.)
     */
    public List<Reference> getSlot() { 
      if (this.slot == null)
        this.slot = new ArrayList<Reference>();
      return this.slot;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setSlot(List<Reference> theSlot) { 
      this.slot = theSlot;
      return this;
    }

    public boolean hasSlot() { 
      if (this.slot == null)
        return false;
      for (Reference item : this.slot)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public Reference addSlot() { //3
      Reference t = new Reference();
      if (this.slot == null)
        this.slot = new ArrayList<Reference>();
      this.slot.add(t);
      return t;
    }

    public Appointment addSlot(Reference t) { //3
      if (t == null)
        return this;
      if (this.slot == null)
        this.slot = new ArrayList<Reference>();
      this.slot.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #slot}, creating it if it does not already exist
     */
    public Reference getSlotFirstRep() { 
      if (getSlot().isEmpty()) {
        addSlot();
      }
      return getSlot().get(0);
    }

    /**
     * @deprecated Use Reference#setResource(IBaseResource) instead
     */
    @Deprecated
    public List<Slot> getSlotTarget() { 
      if (this.slotTarget == null)
        this.slotTarget = new ArrayList<Slot>();
      return this.slotTarget;
    }

    /**
     * @deprecated Use Reference#setResource(IBaseResource) instead
     */
    @Deprecated
    public Slot addSlotTarget() { 
      Slot r = new Slot();
      if (this.slotTarget == null)
        this.slotTarget = new ArrayList<Slot>();
      this.slotTarget.add(r);
      return r;
    }

    /**
     * @return {@link #created} (The date that this appointment was initially created. This could be different to the meta.lastModified value on the initial entry, as this could have been before the resource was created on the FHIR server, and should remain unchanged over the lifespan of the appointment.). This is the underlying object with id, value and extensions. The accessor "getCreated" gives direct access to the value
     */
    public DateTimeType getCreatedElement() { 
      if (this.created == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.created");
        else if (Configuration.doAutoCreate())
          this.created = new DateTimeType(); // bb
      return this.created;
    }

    public boolean hasCreatedElement() { 
      return this.created != null && !this.created.isEmpty();
    }

    public boolean hasCreated() { 
      return this.created != null && !this.created.isEmpty();
    }

    /**
     * @param value {@link #created} (The date that this appointment was initially created. This could be different to the meta.lastModified value on the initial entry, as this could have been before the resource was created on the FHIR server, and should remain unchanged over the lifespan of the appointment.). This is the underlying object with id, value and extensions. The accessor "getCreated" gives direct access to the value
     */
    public Appointment setCreatedElement(DateTimeType value) { 
      this.created = value;
      return this;
    }

    /**
     * @return The date that this appointment was initially created. This could be different to the meta.lastModified value on the initial entry, as this could have been before the resource was created on the FHIR server, and should remain unchanged over the lifespan of the appointment.
     */
    public Date getCreated() { 
      return this.created == null ? null : this.created.getValue();
    }

    /**
     * @param value The date that this appointment was initially created. This could be different to the meta.lastModified value on the initial entry, as this could have been before the resource was created on the FHIR server, and should remain unchanged over the lifespan of the appointment.
     */
    public Appointment setCreated(Date value) { 
      if (value == null)
        this.created = null;
      else {
        if (this.created == null)
          this.created = new DateTimeType();
        this.created.setValue(value);
      }
      return this;
    }

    /**
     * @return {@link #comment} (Additional comments about the appointment.). This is the underlying object with id, value and extensions. The accessor "getComment" gives direct access to the value
     */
    public StringType getCommentElement() { 
      if (this.comment == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.comment");
        else if (Configuration.doAutoCreate())
          this.comment = new StringType(); // bb
      return this.comment;
    }

    public boolean hasCommentElement() { 
      return this.comment != null && !this.comment.isEmpty();
    }

    public boolean hasComment() { 
      return this.comment != null && !this.comment.isEmpty();
    }

    /**
     * @param value {@link #comment} (Additional comments about the appointment.). This is the underlying object with id, value and extensions. The accessor "getComment" gives direct access to the value
     */
    public Appointment setCommentElement(StringType value) { 
      this.comment = value;
      return this;
    }

    /**
     * @return Additional comments about the appointment.
     */
    public String getComment() { 
      return this.comment == null ? null : this.comment.getValue();
    }

    /**
     * @param value Additional comments about the appointment.
     */
    public Appointment setComment(String value) { 
      if (Utilities.noString(value))
        this.comment = null;
      else {
        if (this.comment == null)
          this.comment = new StringType();
        this.comment.setValue(value);
      }
      return this;
    }

    /**
     * @return {@link #patientInstruction} (While Appointment.comment contains information for internal use, Appointment.patientInstructions is used to capture patient facing information about the Appointment (e.g. please bring your referral or fast from 8pm night before).). This is the underlying object with id, value and extensions. The accessor "getPatientInstruction" gives direct access to the value
     */
    public StringType getPatientInstructionElement() { 
      if (this.patientInstruction == null)
        if (Configuration.errorOnAutoCreate())
          throw new Error("Attempt to auto-create Appointment.patientInstruction");
        else if (Configuration.doAutoCreate())
          this.patientInstruction = new StringType(); // bb
      return this.patientInstruction;
    }

    public boolean hasPatientInstructionElement() { 
      return this.patientInstruction != null && !this.patientInstruction.isEmpty();
    }

    public boolean hasPatientInstruction() { 
      return this.patientInstruction != null && !this.patientInstruction.isEmpty();
    }

    /**
     * @param value {@link #patientInstruction} (While Appointment.comment contains information for internal use, Appointment.patientInstructions is used to capture patient facing information about the Appointment (e.g. please bring your referral or fast from 8pm night before).). This is the underlying object with id, value and extensions. The accessor "getPatientInstruction" gives direct access to the value
     */
    public Appointment setPatientInstructionElement(StringType value) { 
      this.patientInstruction = value;
      return this;
    }

    /**
     * @return While Appointment.comment contains information for internal use, Appointment.patientInstructions is used to capture patient facing information about the Appointment (e.g. please bring your referral or fast from 8pm night before).
     */
    public String getPatientInstruction() { 
      return this.patientInstruction == null ? null : this.patientInstruction.getValue();
    }

    /**
     * @param value While Appointment.comment contains information for internal use, Appointment.patientInstructions is used to capture patient facing information about the Appointment (e.g. please bring your referral or fast from 8pm night before).
     */
    public Appointment setPatientInstruction(String value) { 
      if (Utilities.noString(value))
        this.patientInstruction = null;
      else {
        if (this.patientInstruction == null)
          this.patientInstruction = new StringType();
        this.patientInstruction.setValue(value);
      }
      return this;
    }

    /**
     * @return {@link #basedOn} (The service request this appointment is allocated to assess (e.g. incoming referral or procedure request).)
     */
    public List<Reference> getBasedOn() { 
      if (this.basedOn == null)
        this.basedOn = new ArrayList<Reference>();
      return this.basedOn;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setBasedOn(List<Reference> theBasedOn) { 
      this.basedOn = theBasedOn;
      return this;
    }

    public boolean hasBasedOn() { 
      if (this.basedOn == null)
        return false;
      for (Reference item : this.basedOn)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public Reference addBasedOn() { //3
      Reference t = new Reference();
      if (this.basedOn == null)
        this.basedOn = new ArrayList<Reference>();
      this.basedOn.add(t);
      return t;
    }

    public Appointment addBasedOn(Reference t) { //3
      if (t == null)
        return this;
      if (this.basedOn == null)
        this.basedOn = new ArrayList<Reference>();
      this.basedOn.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #basedOn}, creating it if it does not already exist
     */
    public Reference getBasedOnFirstRep() { 
      if (getBasedOn().isEmpty()) {
        addBasedOn();
      }
      return getBasedOn().get(0);
    }

    /**
     * @deprecated Use Reference#setResource(IBaseResource) instead
     */
    @Deprecated
    public List<ServiceRequest> getBasedOnTarget() { 
      if (this.basedOnTarget == null)
        this.basedOnTarget = new ArrayList<ServiceRequest>();
      return this.basedOnTarget;
    }

    /**
     * @deprecated Use Reference#setResource(IBaseResource) instead
     */
    @Deprecated
    public ServiceRequest addBasedOnTarget() { 
      ServiceRequest r = new ServiceRequest();
      if (this.basedOnTarget == null)
        this.basedOnTarget = new ArrayList<ServiceRequest>();
      this.basedOnTarget.add(r);
      return r;
    }

    /**
     * @return {@link #participant} (List of participants involved in the appointment.)
     */
    public List<AppointmentParticipantComponent> getParticipant() { 
      if (this.participant == null)
        this.participant = new ArrayList<AppointmentParticipantComponent>();
      return this.participant;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setParticipant(List<AppointmentParticipantComponent> theParticipant) { 
      this.participant = theParticipant;
      return this;
    }

    public boolean hasParticipant() { 
      if (this.participant == null)
        return false;
      for (AppointmentParticipantComponent item : this.participant)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public AppointmentParticipantComponent addParticipant() { //3
      AppointmentParticipantComponent t = new AppointmentParticipantComponent();
      if (this.participant == null)
        this.participant = new ArrayList<AppointmentParticipantComponent>();
      this.participant.add(t);
      return t;
    }

    public Appointment addParticipant(AppointmentParticipantComponent t) { //3
      if (t == null)
        return this;
      if (this.participant == null)
        this.participant = new ArrayList<AppointmentParticipantComponent>();
      this.participant.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #participant}, creating it if it does not already exist
     */
    public AppointmentParticipantComponent getParticipantFirstRep() { 
      if (getParticipant().isEmpty()) {
        addParticipant();
      }
      return getParticipant().get(0);
    }

    /**
     * @return {@link #requestedPeriod} (A set of date ranges (potentially including times) that the appointment is preferred to be scheduled within. When using these values, the duration (usually in minutes) should be provided to indicate the length of the appointment to fill and populate the start/end times for the actual allocated time.)
     */
    public List<Period> getRequestedPeriod() { 
      if (this.requestedPeriod == null)
        this.requestedPeriod = new ArrayList<Period>();
      return this.requestedPeriod;
    }

    /**
     * @return Returns a reference to <code>this</code> for easy method chaining
     */
    public Appointment setRequestedPeriod(List<Period> theRequestedPeriod) { 
      this.requestedPeriod = theRequestedPeriod;
      return this;
    }

    public boolean hasRequestedPeriod() { 
      if (this.requestedPeriod == null)
        return false;
      for (Period item : this.requestedPeriod)
        if (!item.isEmpty())
          return true;
      return false;
    }

    public Period addRequestedPeriod() { //3
      Period t = new Period();
      if (this.requestedPeriod == null)
        this.requestedPeriod = new ArrayList<Period>();
      this.requestedPeriod.add(t);
      return t;
    }

    public Appointment addRequestedPeriod(Period t) { //3
      if (t == null)
        return this;
      if (this.requestedPeriod == null)
        this.requestedPeriod = new ArrayList<Period>();
      this.requestedPeriod.add(t);
      return this;
    }

    /**
     * @return The first repetition of repeating field {@link #requestedPeriod}, creating it if it does not already exist
     */
    public Period getRequestedPeriodFirstRep() { 
      if (getRequestedPeriod().isEmpty()) {
        addRequestedPeriod();
      }
      return getRequestedPeriod().get(0);
    }

      protected void listChildren(List<Property> children) {
        super.listChildren(children);
        children.add(new Property("identifier", "Identifier", "This records identifiers associated with this appointment concern that are defined by business processes and/or used to refer to it when a direct URL reference to the resource itself is not appropriate (e.g. in CDA documents, or in written / printed documentation).", 0, java.lang.Integer.MAX_VALUE, identifier));
        children.add(new Property("status", "code", "The overall status of the Appointment. Each of the participants has their own participation status which indicates their involvement in the process, however this status indicates the shared status.", 0, 1, status));
        children.add(new Property("serviceCategory", "CodeableConcept", "A broad categorization of the service that is to be performed during this appointment.", 0, java.lang.Integer.MAX_VALUE, serviceCategory));
        children.add(new Property("serviceType", "CodeableConcept", "The specific service that is to be performed during this appointment.", 0, java.lang.Integer.MAX_VALUE, serviceType));
        children.add(new Property("specialty", "CodeableConcept", "The specialty of a practitioner that would be required to perform the service requested in this appointment.", 0, java.lang.Integer.MAX_VALUE, specialty));
        children.add(new Property("appointmentType", "CodeableConcept", "The style of appointment or patient that has been booked in the slot (not service type).", 0, 1, appointmentType));
        children.add(new Property("reason", "CodeableConcept", "The reason that this appointment is being scheduled. This is more clinical than administrative.", 0, java.lang.Integer.MAX_VALUE, reason));
        children.add(new Property("indication", "Reference(Condition|Procedure)", "Reason the appointment has been scheduled to take place, as specified using information from another resource. When the patient arrives and the encounter begins it may be used as the admission diagnosis. The indication will typically be a Condition (with other resources referenced in the evidence.detail), or a Procedure.", 0, java.lang.Integer.MAX_VALUE, indication));
        children.add(new Property("priority", "unsignedInt", "The priority of the appointment. Can be used to make informed decisions if needing to re-prioritize appointments. (The iCal Standard specifies 0 as undefined, 1 as highest, 9 as lowest priority).", 0, 1, priority));
        children.add(new Property("description", "string", "The brief description of the appointment as would be shown on a subject line in a meeting request, or appointment list. Detailed or expanded information should be put in the comment field.", 0, 1, description));
        children.add(new Property("supportingInformation", "Reference(Any)", "Additional information to support the appointment provided when making the appointment.", 0, java.lang.Integer.MAX_VALUE, supportingInformation));
        children.add(new Property("start", "instant", "Date/Time that the appointment is to take place.", 0, 1, start));
        children.add(new Property("end", "instant", "Date/Time that the appointment is to conclude.", 0, 1, end));
        children.add(new Property("minutesDuration", "positiveInt", "Number of minutes that the appointment is to take. This can be less than the duration between the start and end times.  For example, where the actual time of appointment is only an estimate or if a 30 minute appointment is being requested, but any time would work.  Also, if there is, for example, a planned 15 minute break in the middle of a long appointment, the duration may be 15 minutes less than the difference between the start and end.", 0, 1, minutesDuration));
        children.add(new Property("slot", "Reference(Slot)", "The slots from the participants' schedules that will be filled by the appointment.", 0, java.lang.Integer.MAX_VALUE, slot));
        children.add(new Property("created", "dateTime", "The date that this appointment was initially created. This could be different to the meta.lastModified value on the initial entry, as this could have been before the resource was created on the FHIR server, and should remain unchanged over the lifespan of the appointment.", 0, 1, created));
        children.add(new Property("comment", "string", "Additional comments about the appointment.", 0, 1, comment));
        children.add(new Property("patientInstruction", "string", "While Appointment.comment contains information for internal use, Appointment.patientInstructions is used to capture patient facing information about the Appointment (e.g. please bring your referral or fast from 8pm night before).", 0, 1, patientInstruction));
        children.add(new Property("basedOn", "Reference(ServiceRequest)", "The service request this appointment is allocated to assess (e.g. incoming referral or procedure request).", 0, java.lang.Integer.MAX_VALUE, basedOn));
        children.add(new Property("participant", "", "List of participants involved in the appointment.", 0, java.lang.Integer.MAX_VALUE, participant));
        children.add(new Property("requestedPeriod", "Period", "A set of date ranges (potentially including times) that the appointment is preferred to be scheduled within. When using these values, the duration (usually in minutes) should be provided to indicate the length of the appointment to fill and populate the start/end times for the actual allocated time.", 0, java.lang.Integer.MAX_VALUE, requestedPeriod));
      }

      @Override
      public Property getNamedProperty(int _hash, String _name, boolean _checkValid) throws FHIRException {
        switch (_hash) {
        case -1618432855: /*identifier*/  return new Property("identifier", "Identifier", "This records identifiers associated with this appointment concern that are defined by business processes and/or used to refer to it when a direct URL reference to the resource itself is not appropriate (e.g. in CDA documents, or in written / printed documentation).", 0, java.lang.Integer.MAX_VALUE, identifier);
        case -892481550: /*status*/  return new Property("status", "code", "The overall status of the Appointment. Each of the participants has their own participation status which indicates their involvement in the process, however this status indicates the shared status.", 0, 1, status);
        case 1281188563: /*serviceCategory*/  return new Property("serviceCategory", "CodeableConcept", "A broad categorization of the service that is to be performed during this appointment.", 0, java.lang.Integer.MAX_VALUE, serviceCategory);
        case -1928370289: /*serviceType*/  return new Property("serviceType", "CodeableConcept", "The specific service that is to be performed during this appointment.", 0, java.lang.Integer.MAX_VALUE, serviceType);
        case -1694759682: /*specialty*/  return new Property("specialty", "CodeableConcept", "The specialty of a practitioner that would be required to perform the service requested in this appointment.", 0, java.lang.Integer.MAX_VALUE, specialty);
        case -1596426375: /*appointmentType*/  return new Property("appointmentType", "CodeableConcept", "The style of appointment or patient that has been booked in the slot (not service type).", 0, 1, appointmentType);
        case -934964668: /*reason*/  return new Property("reason", "CodeableConcept", "The reason that this appointment is being scheduled. This is more clinical than administrative.", 0, java.lang.Integer.MAX_VALUE, reason);
        case -597168804: /*indication*/  return new Property("indication", "Reference(Condition|Procedure)", "Reason the appointment has been scheduled to take place, as specified using information from another resource. When the patient arrives and the encounter begins it may be used as the admission diagnosis. The indication will typically be a Condition (with other resources referenced in the evidence.detail), or a Procedure.", 0, java.lang.Integer.MAX_VALUE, indication);
        case -1165461084: /*priority*/  return new Property("priority", "unsignedInt", "The priority of the appointment. Can be used to make informed decisions if needing to re-prioritize appointments. (The iCal Standard specifies 0 as undefined, 1 as highest, 9 as lowest priority).", 0, 1, priority);
        case -1724546052: /*description*/  return new Property("description", "string", "The brief description of the appointment as would be shown on a subject line in a meeting request, or appointment list. Detailed or expanded information should be put in the comment field.", 0, 1, description);
        case -1248768647: /*supportingInformation*/  return new Property("supportingInformation", "Reference(Any)", "Additional information to support the appointment provided when making the appointment.", 0, java.lang.Integer.MAX_VALUE, supportingInformation);
        case 109757538: /*start*/  return new Property("start", "instant", "Date/Time that the appointment is to take place.", 0, 1, start);
        case 100571: /*end*/  return new Property("end", "instant", "Date/Time that the appointment is to conclude.", 0, 1, end);
        case -413630573: /*minutesDuration*/  return new Property("minutesDuration", "positiveInt", "Number of minutes that the appointment is to take. This can be less than the duration between the start and end times.  For example, where the actual time of appointment is only an estimate or if a 30 minute appointment is being requested, but any time would work.  Also, if there is, for example, a planned 15 minute break in the middle of a long appointment, the duration may be 15 minutes less than the difference between the start and end.", 0, 1, minutesDuration);
        case 3533310: /*slot*/  return new Property("slot", "Reference(Slot)", "The slots from the participants' schedules that will be filled by the appointment.", 0, java.lang.Integer.MAX_VALUE, slot);
        case 1028554472: /*created*/  return new Property("created", "dateTime", "The date that this appointment was initially created. This could be different to the meta.lastModified value on the initial entry, as this could have been before the resource was created on the FHIR server, and should remain unchanged over the lifespan of the appointment.", 0, 1, created);
        case 950398559: /*comment*/  return new Property("comment", "string", "Additional comments about the appointment.", 0, 1, comment);
        case 737543241: /*patientInstruction*/  return new Property("patientInstruction", "string", "While Appointment.comment contains information for internal use, Appointment.patientInstructions is used to capture patient facing information about the Appointment (e.g. please bring your referral or fast from 8pm night before).", 0, 1, patientInstruction);
        case -332612366: /*basedOn*/  return new Property("basedOn", "Reference(ServiceRequest)", "The service request this appointment is allocated to assess (e.g. incoming referral or procedure request).", 0, java.lang.Integer.MAX_VALUE, basedOn);
        case 767422259: /*participant*/  return new Property("participant", "", "List of participants involved in the appointment.", 0, java.lang.Integer.MAX_VALUE, participant);
        case -897241393: /*requestedPeriod*/  return new Property("requestedPeriod", "Period", "A set of date ranges (potentially including times) that the appointment is preferred to be scheduled within. When using these values, the duration (usually in minutes) should be provided to indicate the length of the appointment to fill and populate the start/end times for the actual allocated time.", 0, java.lang.Integer.MAX_VALUE, requestedPeriod);
        default: return super.getNamedProperty(_hash, _name, _checkValid);
        }

      }

      @Override
      public Base[] getProperty(int hash, String name, boolean checkValid) throws FHIRException {
        switch (hash) {
        case -1618432855: /*identifier*/ return this.identifier == null ? new Base[0] : this.identifier.toArray(new Base[this.identifier.size()]); // Identifier
        case -892481550: /*status*/ return this.status == null ? new Base[0] : new Base[] {this.status}; // Enumeration<AppointmentStatus>
        case 1281188563: /*serviceCategory*/ return this.serviceCategory == null ? new Base[0] : this.serviceCategory.toArray(new Base[this.serviceCategory.size()]); // CodeableConcept
        case -1928370289: /*serviceType*/ return this.serviceType == null ? new Base[0] : this.serviceType.toArray(new Base[this.serviceType.size()]); // CodeableConcept
        case -1694759682: /*specialty*/ return this.specialty == null ? new Base[0] : this.specialty.toArray(new Base[this.specialty.size()]); // CodeableConcept
        case -1596426375: /*appointmentType*/ return this.appointmentType == null ? new Base[0] : new Base[] {this.appointmentType}; // CodeableConcept
        case -934964668: /*reason*/ return this.reason == null ? new Base[0] : this.reason.toArray(new Base[this.reason.size()]); // CodeableConcept
        case -597168804: /*indication*/ return this.indication == null ? new Base[0] : this.indication.toArray(new Base[this.indication.size()]); // Reference
        case -1165461084: /*priority*/ return this.priority == null ? new Base[0] : new Base[] {this.priority}; // UnsignedIntType
        case -1724546052: /*description*/ return this.description == null ? new Base[0] : new Base[] {this.description}; // StringType
        case -1248768647: /*supportingInformation*/ return this.supportingInformation == null ? new Base[0] : this.supportingInformation.toArray(new Base[this.supportingInformation.size()]); // Reference
        case 109757538: /*start*/ return this.start == null ? new Base[0] : new Base[] {this.start}; // InstantType
        case 100571: /*end*/ return this.end == null ? new Base[0] : new Base[] {this.end}; // InstantType
        case -413630573: /*minutesDuration*/ return this.minutesDuration == null ? new Base[0] : new Base[] {this.minutesDuration}; // PositiveIntType
        case 3533310: /*slot*/ return this.slot == null ? new Base[0] : this.slot.toArray(new Base[this.slot.size()]); // Reference
        case 1028554472: /*created*/ return this.created == null ? new Base[0] : new Base[] {this.created}; // DateTimeType
        case 950398559: /*comment*/ return this.comment == null ? new Base[0] : new Base[] {this.comment}; // StringType
        case 737543241: /*patientInstruction*/ return this.patientInstruction == null ? new Base[0] : new Base[] {this.patientInstruction}; // StringType
        case -332612366: /*basedOn*/ return this.basedOn == null ? new Base[0] : this.basedOn.toArray(new Base[this.basedOn.size()]); // Reference
        case 767422259: /*participant*/ return this.participant == null ? new Base[0] : this.participant.toArray(new Base[this.participant.size()]); // AppointmentParticipantComponent
        case -897241393: /*requestedPeriod*/ return this.requestedPeriod == null ? new Base[0] : this.requestedPeriod.toArray(new Base[this.requestedPeriod.size()]); // Period
        default: return super.getProperty(hash, name, checkValid);
        }

      }

      @Override
      public Base setProperty(int hash, String name, Base value) throws FHIRException {
        switch (hash) {
        case -1618432855: // identifier
          this.getIdentifier().add(castToIdentifier(value)); // Identifier
          return value;
        case -892481550: // status
          value = new AppointmentStatusEnumFactory().fromType(castToCode(value));
          this.status = (Enumeration) value; // Enumeration<AppointmentStatus>
          return value;
        case 1281188563: // serviceCategory
          this.getServiceCategory().add(castToCodeableConcept(value)); // CodeableConcept
          return value;
        case -1928370289: // serviceType
          this.getServiceType().add(castToCodeableConcept(value)); // CodeableConcept
          return value;
        case -1694759682: // specialty
          this.getSpecialty().add(castToCodeableConcept(value)); // CodeableConcept
          return value;
        case -1596426375: // appointmentType
          this.appointmentType = castToCodeableConcept(value); // CodeableConcept
          return value;
        case -934964668: // reason
          this.getReason().add(castToCodeableConcept(value)); // CodeableConcept
          return value;
        case -597168804: // indication
          this.getIndication().add(castToReference(value)); // Reference
          return value;
        case -1165461084: // priority
          this.priority = castToUnsignedInt(value); // UnsignedIntType
          return value;
        case -1724546052: // description
          this.description = castToString(value); // StringType
          return value;
        case -1248768647: // supportingInformation
          this.getSupportingInformation().add(castToReference(value)); // Reference
          return value;
        case 109757538: // start
          this.start = castToInstant(value); // InstantType
          return value;
        case 100571: // end
          this.end = castToInstant(value); // InstantType
          return value;
        case -413630573: // minutesDuration
          this.minutesDuration = castToPositiveInt(value); // PositiveIntType
          return value;
        case 3533310: // slot
          this.getSlot().add(castToReference(value)); // Reference
          return value;
        case 1028554472: // created
          this.created = castToDateTime(value); // DateTimeType
          return value;
        case 950398559: // comment
          this.comment = castToString(value); // StringType
          return value;
        case 737543241: // patientInstruction
          this.patientInstruction = castToString(value); // StringType
          return value;
        case -332612366: // basedOn
          this.getBasedOn().add(castToReference(value)); // Reference
          return value;
        case 767422259: // participant
          this.getParticipant().add((AppointmentParticipantComponent) value); // AppointmentParticipantComponent
          return value;
        case -897241393: // requestedPeriod
          this.getRequestedPeriod().add(castToPeriod(value)); // Period
          return value;
        default: return super.setProperty(hash, name, value);
        }

      }

      @Override
      public Base setProperty(String name, Base value) throws FHIRException {
        if (name.equals("identifier")) {
          this.getIdentifier().add(castToIdentifier(value));
        } else if (name.equals("status")) {
          value = new AppointmentStatusEnumFactory().fromType(castToCode(value));
          this.status = (Enumeration) value; // Enumeration<AppointmentStatus>
        } else if (name.equals("serviceCategory")) {
          this.getServiceCategory().add(castToCodeableConcept(value));
        } else if (name.equals("serviceType")) {
          this.getServiceType().add(castToCodeableConcept(value));
        } else if (name.equals("specialty")) {
          this.getSpecialty().add(castToCodeableConcept(value));
        } else if (name.equals("appointmentType")) {
          this.appointmentType = castToCodeableConcept(value); // CodeableConcept
        } else if (name.equals("reason")) {
          this.getReason().add(castToCodeableConcept(value));
        } else if (name.equals("indication")) {
          this.getIndication().add(castToReference(value));
        } else if (name.equals("priority")) {
          this.priority = castToUnsignedInt(value); // UnsignedIntType
        } else if (name.equals("description")) {
          this.description = castToString(value); // StringType
        } else if (name.equals("supportingInformation")) {
          this.getSupportingInformation().add(castToReference(value));
        } else if (name.equals("start")) {
          this.start = castToInstant(value); // InstantType
        } else if (name.equals("end")) {
          this.end = castToInstant(value); // InstantType
        } else if (name.equals("minutesDuration")) {
          this.minutesDuration = castToPositiveInt(value); // PositiveIntType
        } else if (name.equals("slot")) {
          this.getSlot().add(castToReference(value));
        } else if (name.equals("created")) {
          this.created = castToDateTime(value); // DateTimeType
        } else if (name.equals("comment")) {
          this.comment = castToString(value); // StringType
        } else if (name.equals("patientInstruction")) {
          this.patientInstruction = castToString(value); // StringType
        } else if (name.equals("basedOn")) {
          this.getBasedOn().add(castToReference(value));
        } else if (name.equals("participant")) {
          this.getParticipant().add((AppointmentParticipantComponent) value);
        } else if (name.equals("requestedPeriod")) {
          this.getRequestedPeriod().add(castToPeriod(value));
        } else
          return super.setProperty(name, value);
        return value;
      }

      @Override
      public Base makeProperty(int hash, String name) throws FHIRException {
        switch (hash) {
        case -1618432855:  return addIdentifier(); 
        case -892481550:  return getStatusElement();
        case 1281188563:  return addServiceCategory(); 
        case -1928370289:  return addServiceType(); 
        case -1694759682:  return addSpecialty(); 
        case -1596426375:  return getAppointmentType(); 
        case -934964668:  return addReason(); 
        case -597168804:  return addIndication(); 
        case -1165461084:  return getPriorityElement();
        case -1724546052:  return getDescriptionElement();
        case -1248768647:  return addSupportingInformation(); 
        case 109757538:  return getStartElement();
        case 100571:  return getEndElement();
        case -413630573:  return getMinutesDurationElement();
        case 3533310:  return addSlot(); 
        case 1028554472:  return getCreatedElement();
        case 950398559:  return getCommentElement();
        case 737543241:  return getPatientInstructionElement();
        case -332612366:  return addBasedOn(); 
        case 767422259:  return addParticipant(); 
        case -897241393:  return addRequestedPeriod(); 
        default: return super.makeProperty(hash, name);
        }

      }

      @Override
      public String[] getTypesForProperty(int hash, String name) throws FHIRException {
        switch (hash) {
        case -1618432855: /*identifier*/ return new String[] {"Identifier"};
        case -892481550: /*status*/ return new String[] {"code"};
        case 1281188563: /*serviceCategory*/ return new String[] {"CodeableConcept"};
        case -1928370289: /*serviceType*/ return new String[] {"CodeableConcept"};
        case -1694759682: /*specialty*/ return new String[] {"CodeableConcept"};
        case -1596426375: /*appointmentType*/ return new String[] {"CodeableConcept"};
        case -934964668: /*reason*/ return new String[] {"CodeableConcept"};
        case -597168804: /*indication*/ return new String[] {"Reference"};
        case -1165461084: /*priority*/ return new String[] {"unsignedInt"};
        case -1724546052: /*description*/ return new String[] {"string"};
        case -1248768647: /*supportingInformation*/ return new String[] {"Reference"};
        case 109757538: /*start*/ return new String[] {"instant"};
        case 100571: /*end*/ return new String[] {"instant"};
        case -413630573: /*minutesDuration*/ return new String[] {"positiveInt"};
        case 3533310: /*slot*/ return new String[] {"Reference"};
        case 1028554472: /*created*/ return new String[] {"dateTime"};
        case 950398559: /*comment*/ return new String[] {"string"};
        case 737543241: /*patientInstruction*/ return new String[] {"string"};
        case -332612366: /*basedOn*/ return new String[] {"Reference"};
        case 767422259: /*participant*/ return new String[] {};
        case -897241393: /*requestedPeriod*/ return new String[] {"Period"};
        default: return super.getTypesForProperty(hash, name);
        }

      }

      @Override
      public Base addChild(String name) throws FHIRException {
        if (name.equals("identifier")) {
          return addIdentifier();
        }
        else if (name.equals("status")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.status");
        }
        else if (name.equals("serviceCategory")) {
          return addServiceCategory();
        }
        else if (name.equals("serviceType")) {
          return addServiceType();
        }
        else if (name.equals("specialty")) {
          return addSpecialty();
        }
        else if (name.equals("appointmentType")) {
          this.appointmentType = new CodeableConcept();
          return this.appointmentType;
        }
        else if (name.equals("reason")) {
          return addReason();
        }
        else if (name.equals("indication")) {
          return addIndication();
        }
        else if (name.equals("priority")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.priority");
        }
        else if (name.equals("description")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.description");
        }
        else if (name.equals("supportingInformation")) {
          return addSupportingInformation();
        }
        else if (name.equals("start")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.start");
        }
        else if (name.equals("end")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.end");
        }
        else if (name.equals("minutesDuration")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.minutesDuration");
        }
        else if (name.equals("slot")) {
          return addSlot();
        }
        else if (name.equals("created")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.created");
        }
        else if (name.equals("comment")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.comment");
        }
        else if (name.equals("patientInstruction")) {
          throw new FHIRException("Cannot call addChild on a primitive type Appointment.patientInstruction");
        }
        else if (name.equals("basedOn")) {
          return addBasedOn();
        }
        else if (name.equals("participant")) {
          return addParticipant();
        }
        else if (name.equals("requestedPeriod")) {
          return addRequestedPeriod();
        }
        else
          return super.addChild(name);
      }

  public String fhirType() {
    return "Appointment";

  }

      public Appointment copy() {
        Appointment dst = new Appointment();
        copyValues(dst);
        if (identifier != null) {
          dst.identifier = new ArrayList<Identifier>();
          for (Identifier i : identifier)
            dst.identifier.add(i.copy());
        };
        dst.status = status == null ? null : status.copy();
        if (serviceCategory != null) {
          dst.serviceCategory = new ArrayList<CodeableConcept>();
          for (CodeableConcept i : serviceCategory)
            dst.serviceCategory.add(i.copy());
        };
        if (serviceType != null) {
          dst.serviceType = new ArrayList<CodeableConcept>();
          for (CodeableConcept i : serviceType)
            dst.serviceType.add(i.copy());
        };
        if (specialty != null) {
          dst.specialty = new ArrayList<CodeableConcept>();
          for (CodeableConcept i : specialty)
            dst.specialty.add(i.copy());
        };
        dst.appointmentType = appointmentType == null ? null : appointmentType.copy();
        if (reason != null) {
          dst.reason = new ArrayList<CodeableConcept>();
          for (CodeableConcept i : reason)
            dst.reason.add(i.copy());
        };
        if (indication != null) {
          dst.indication = new ArrayList<Reference>();
          for (Reference i : indication)
            dst.indication.add(i.copy());
        };
        dst.priority = priority == null ? null : priority.copy();
        dst.description = description == null ? null : description.copy();
        if (supportingInformation != null) {
          dst.supportingInformation = new ArrayList<Reference>();
          for (Reference i : supportingInformation)
            dst.supportingInformation.add(i.copy());
        };
        dst.start = start == null ? null : start.copy();
        dst.end = end == null ? null : end.copy();
        dst.minutesDuration = minutesDuration == null ? null : minutesDuration.copy();
        if (slot != null) {
          dst.slot = new ArrayList<Reference>();
          for (Reference i : slot)
            dst.slot.add(i.copy());
        };
        dst.created = created == null ? null : created.copy();
        dst.comment = comment == null ? null : comment.copy();
        dst.patientInstruction = patientInstruction == null ? null : patientInstruction.copy();
        if (basedOn != null) {
          dst.basedOn = new ArrayList<Reference>();
          for (Reference i : basedOn)
            dst.basedOn.add(i.copy());
        };
        if (participant != null) {
          dst.participant = new ArrayList<AppointmentParticipantComponent>();
          for (AppointmentParticipantComponent i : participant)
            dst.participant.add(i.copy());
        };
        if (requestedPeriod != null) {
          dst.requestedPeriod = new ArrayList<Period>();
          for (Period i : requestedPeriod)
            dst.requestedPeriod.add(i.copy());
        };
        return dst;
      }

      protected Appointment typedCopy() {
        return copy();
      }

      @Override
      public boolean equalsDeep(Base other_) {
        if (!super.equalsDeep(other_))
          return false;
        if (!(other_ instanceof Appointment))
          return false;
        Appointment o = (Appointment) other_;
        return compareDeep(identifier, o.identifier, true) && compareDeep(status, o.status, true) && compareDeep(serviceCategory, o.serviceCategory, true)
           && compareDeep(serviceType, o.serviceType, true) && compareDeep(specialty, o.specialty, true) && compareDeep(appointmentType, o.appointmentType, true)
           && compareDeep(reason, o.reason, true) && compareDeep(indication, o.indication, true) && compareDeep(priority, o.priority, true)
           && compareDeep(description, o.description, true) && compareDeep(supportingInformation, o.supportingInformation, true)
           && compareDeep(start, o.start, true) && compareDeep(end, o.end, true) && compareDeep(minutesDuration, o.minutesDuration, true)
           && compareDeep(slot, o.slot, true) && compareDeep(created, o.created, true) && compareDeep(comment, o.comment, true)
           && compareDeep(patientInstruction, o.patientInstruction, true) && compareDeep(basedOn, o.basedOn, true)
           && compareDeep(participant, o.participant, true) && compareDeep(requestedPeriod, o.requestedPeriod, true)
          ;
      }

      @Override
      public boolean equalsShallow(Base other_) {
        if (!super.equalsShallow(other_))
          return false;
        if (!(other_ instanceof Appointment))
          return false;
        Appointment o = (Appointment) other_;
        return compareValues(status, o.status, true) && compareValues(priority, o.priority, true) && compareValues(description, o.description, true)
           && compareValues(start, o.start, true) && compareValues(end, o.end, true) && compareValues(minutesDuration, o.minutesDuration, true)
           && compareValues(created, o.created, true) && compareValues(comment, o.comment, true) && compareValues(patientInstruction, o.patientInstruction, true)
          ;
      }

      public boolean isEmpty() {
        return super.isEmpty() && ca.uhn.fhir.util.ElementUtil.isEmpty(identifier, status, serviceCategory
          , serviceType, specialty, appointmentType, reason, indication, priority, description
          , supportingInformation, start, end, minutesDuration, slot, created, comment, patientInstruction
          , basedOn, participant, requestedPeriod);
      }

  @Override
  public ResourceType getResourceType() {
    return ResourceType.Appointment;
   }

 /**
   * Search parameter: <b>date</b>
   * <p>
   * Description: <b>Appointment date/time.</b><br>
   * Type: <b>date</b><br>
   * Path: <b>Appointment.start</b><br>
   * </p>
   */
  @SearchParamDefinition(name="date", path="Appointment.start", description="Appointment date/time.", type="date" )
  public static final String SP_DATE = "date";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>date</b>
   * <p>
   * Description: <b>Appointment date/time.</b><br>
   * Type: <b>date</b><br>
   * Path: <b>Appointment.start</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.DateClientParam DATE = new ca.uhn.fhir.rest.gclient.DateClientParam(SP_DATE);

 /**
   * Search parameter: <b>actor</b>
   * <p>
   * Description: <b>Any one of the individuals participating in the appointment</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.participant.actor</b><br>
   * </p>
   */
  @SearchParamDefinition(name="actor", path="Appointment.participant.actor", description="Any one of the individuals participating in the appointment", type="reference", providesMembershipIn={ @ca.uhn.fhir.model.api.annotation.Compartment(name="Device"), @ca.uhn.fhir.model.api.annotation.Compartment(name="Patient"), @ca.uhn.fhir.model.api.annotation.Compartment(name="Practitioner"), @ca.uhn.fhir.model.api.annotation.Compartment(name="RelatedPerson") }, target={Device.class, HealthcareService.class, Location.class, Patient.class, Practitioner.class, RelatedPerson.class } )
  public static final String SP_ACTOR = "actor";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>actor</b>
   * <p>
   * Description: <b>Any one of the individuals participating in the appointment</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.participant.actor</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.ReferenceClientParam ACTOR = new ca.uhn.fhir.rest.gclient.ReferenceClientParam(SP_ACTOR);

/**
   * Constant for fluent queries to be used to add include statements. Specifies
   * the path value of "<b>Appointment:actor</b>".
   */
  public static final ca.uhn.fhir.model.api.Include INCLUDE_ACTOR = new ca.uhn.fhir.model.api.Include("Appointment:actor").toLocked();

 /**
   * Search parameter: <b>identifier</b>
   * <p>
   * Description: <b>An Identifier of the Appointment</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.identifier</b><br>
   * </p>
   */
  @SearchParamDefinition(name="identifier", path="Appointment.identifier", description="An Identifier of the Appointment", type="token" )
  public static final String SP_IDENTIFIER = "identifier";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>identifier</b>
   * <p>
   * Description: <b>An Identifier of the Appointment</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.identifier</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.TokenClientParam IDENTIFIER = new ca.uhn.fhir.rest.gclient.TokenClientParam(SP_IDENTIFIER);

 /**
   * Search parameter: <b>based-on</b>
   * <p>
   * Description: <b>The service request this appointment is allocated to assess</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.basedOn</b><br>
   * </p>
   */
  @SearchParamDefinition(name="based-on", path="Appointment.basedOn.where(resolve() is ServiceRequest)", description="The service request this appointment is allocated to assess", type="reference", target={ServiceRequest.class } )
  public static final String SP_BASED_ON = "based-on";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>based-on</b>
   * <p>
   * Description: <b>The service request this appointment is allocated to assess</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.basedOn</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.ReferenceClientParam BASED_ON = new ca.uhn.fhir.rest.gclient.ReferenceClientParam(SP_BASED_ON);

/**
   * Constant for fluent queries to be used to add include statements. Specifies
   * the path value of "<b>Appointment:based-on</b>".
   */
  public static final ca.uhn.fhir.model.api.Include INCLUDE_BASED_ON = new ca.uhn.fhir.model.api.Include("Appointment:based-on").toLocked();

 /**
   * Search parameter: <b>practitioner</b>
   * <p>
   * Description: <b>One of the individuals of the appointment is this practitioner</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.participant.actor</b><br>
   * </p>
   */
  @SearchParamDefinition(name="practitioner", path="Appointment.participant.actor.where(resolve() is Practitioner)", description="One of the individuals of the appointment is this practitioner", type="reference", target={Practitioner.class } )
  public static final String SP_PRACTITIONER = "practitioner";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>practitioner</b>
   * <p>
   * Description: <b>One of the individuals of the appointment is this practitioner</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.participant.actor</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.ReferenceClientParam PRACTITIONER = new ca.uhn.fhir.rest.gclient.ReferenceClientParam(SP_PRACTITIONER);

/**
   * Constant for fluent queries to be used to add include statements. Specifies
   * the path value of "<b>Appointment:practitioner</b>".
   */
  public static final ca.uhn.fhir.model.api.Include INCLUDE_PRACTITIONER = new ca.uhn.fhir.model.api.Include("Appointment:practitioner").toLocked();

 /**
   * Search parameter: <b>part-status</b>
   * <p>
   * Description: <b>The Participation status of the subject, or other participant on the appointment. Can be used to locate participants that have not responded to meeting requests.</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.participant.status</b><br>
   * </p>
   */
  @SearchParamDefinition(name="part-status", path="Appointment.participant.status", description="The Participation status of the subject, or other participant on the appointment. Can be used to locate participants that have not responded to meeting requests.", type="token" )
  public static final String SP_PART_STATUS = "part-status";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>part-status</b>
   * <p>
   * Description: <b>The Participation status of the subject, or other participant on the appointment. Can be used to locate participants that have not responded to meeting requests.</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.participant.status</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.TokenClientParam PART_STATUS = new ca.uhn.fhir.rest.gclient.TokenClientParam(SP_PART_STATUS);

 /**
   * Search parameter: <b>patient</b>
   * <p>
   * Description: <b>One of the individuals of the appointment is this patient</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.participant.actor</b><br>
   * </p>
   */
  @SearchParamDefinition(name="patient", path="Appointment.participant.actor.where(resolve() is Patient)", description="One of the individuals of the appointment is this patient", type="reference", target={Patient.class } )
  public static final String SP_PATIENT = "patient";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>patient</b>
   * <p>
   * Description: <b>One of the individuals of the appointment is this patient</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.participant.actor</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.ReferenceClientParam PATIENT = new ca.uhn.fhir.rest.gclient.ReferenceClientParam(SP_PATIENT);

/**
   * Constant for fluent queries to be used to add include statements. Specifies
   * the path value of "<b>Appointment:patient</b>".
   */
  public static final ca.uhn.fhir.model.api.Include INCLUDE_PATIENT = new ca.uhn.fhir.model.api.Include("Appointment:patient").toLocked();

 /**
   * Search parameter: <b>appointment-type</b>
   * <p>
   * Description: <b>The style of appointment or patient that has been booked in the slot (not service type)</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.appointmentType</b><br>
   * </p>
   */
  @SearchParamDefinition(name="appointment-type", path="Appointment.appointmentType", description="The style of appointment or patient that has been booked in the slot (not service type)", type="token" )
  public static final String SP_APPOINTMENT_TYPE = "appointment-type";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>appointment-type</b>
   * <p>
   * Description: <b>The style of appointment or patient that has been booked in the slot (not service type)</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.appointmentType</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.TokenClientParam APPOINTMENT_TYPE = new ca.uhn.fhir.rest.gclient.TokenClientParam(SP_APPOINTMENT_TYPE);

 /**
   * Search parameter: <b>service-type</b>
   * <p>
   * Description: <b>The specific service that is to be performed during this appointment</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.serviceType</b><br>
   * </p>
   */
  @SearchParamDefinition(name="service-type", path="Appointment.serviceType", description="The specific service that is to be performed during this appointment", type="token" )
  public static final String SP_SERVICE_TYPE = "service-type";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>service-type</b>
   * <p>
   * Description: <b>The specific service that is to be performed during this appointment</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.serviceType</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.TokenClientParam SERVICE_TYPE = new ca.uhn.fhir.rest.gclient.TokenClientParam(SP_SERVICE_TYPE);

 /**
   * Search parameter: <b>location</b>
   * <p>
   * Description: <b>This location is listed in the participants of the appointment</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.participant.actor</b><br>
   * </p>
   */
  @SearchParamDefinition(name="location", path="Appointment.participant.actor.where(resolve() is Location)", description="This location is listed in the participants of the appointment", type="reference", target={Location.class } )
  public static final String SP_LOCATION = "location";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>location</b>
   * <p>
   * Description: <b>This location is listed in the participants of the appointment</b><br>
   * Type: <b>reference</b><br>
   * Path: <b>Appointment.participant.actor</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.ReferenceClientParam LOCATION = new ca.uhn.fhir.rest.gclient.ReferenceClientParam(SP_LOCATION);

/**
   * Constant for fluent queries to be used to add include statements. Specifies
   * the path value of "<b>Appointment:location</b>".
   */
  public static final ca.uhn.fhir.model.api.Include INCLUDE_LOCATION = new ca.uhn.fhir.model.api.Include("Appointment:location").toLocked();

 /**
   * Search parameter: <b>status</b>
   * <p>
   * Description: <b>The overall status of the appointment</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.status</b><br>
   * </p>
   */
  @SearchParamDefinition(name="status", path="Appointment.status", description="The overall status of the appointment", type="token" )
  public static final String SP_STATUS = "status";
 /**
   * <b>Fluent Client</b> search parameter constant for <b>status</b>
   * <p>
   * Description: <b>The overall status of the appointment</b><br>
   * Type: <b>token</b><br>
   * Path: <b>Appointment.status</b><br>
   * </p>
   */
  public static final ca.uhn.fhir.rest.gclient.TokenClientParam STATUS = new ca.uhn.fhir.rest.gclient.TokenClientParam(SP_STATUS);


}