001package ca.uhn.fhir.rest.param;
002
003import static org.apache.commons.lang3.StringUtils.defaultString;
004
005/*
006 * #%L
007 * HAPI FHIR - Core Library
008 * %%
009 * Copyright (C) 2014 - 2017 University Health Network
010 * %%
011 * Licensed under the Apache License, Version 2.0 (the "License");
012 * you may not use this file except in compliance with the License.
013 * You may obtain a copy of the License at
014 * 
015 *      http://www.apache.org/licenses/LICENSE-2.0
016 * 
017 * Unless required by applicable law or agreed to in writing, software
018 * distributed under the License is distributed on an "AS IS" BASIS,
019 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
020 * See the License for the specific language governing permissions and
021 * limitations under the License.
022 * #L%
023 */
024
025import ca.uhn.fhir.context.FhirContext;
026import ca.uhn.fhir.model.api.IQueryParameterType;
027import ca.uhn.fhir.rest.api.Constants;
028import ca.uhn.fhir.rest.server.exceptions.InvalidRequestException;
029
030/**
031 * Implementation of the _has method parameter
032 */
033public class HasParam extends BaseParam implements IQueryParameterType {
034
035        private static final long serialVersionUID = 1L;
036        
037        private String myOwningFieldName;
038        private String myParameterName;
039        private String myParameterValue;
040        private String myTargetResourceType;
041
042        public HasParam() {
043                super();
044        }
045
046
047        public HasParam(String theTargetResourceType, String theOwningFieldName, String theParameterName, String theParameterValue) {
048                this();
049                myTargetResourceType = theTargetResourceType;
050                myOwningFieldName = theOwningFieldName;
051                myParameterName = theParameterName;
052                myParameterValue = theParameterValue;
053        }
054
055
056        @Override
057        String doGetQueryParameterQualifier() {
058                return myTargetResourceType + ':' + myParameterName + ':' + myParameterValue;
059        }
060        
061        @Override
062        String doGetValueAsQueryToken(FhirContext theContext) {
063                return myParameterValue;
064        }
065
066        @Override
067        void doSetValueAsQueryToken(FhirContext theContext, String theParamName, String theQualifier, String theValue) {
068                String qualifier = defaultString(theQualifier);
069                if (!qualifier.startsWith(":")) {
070                        throwInvalidSyntaxException(Constants.PARAM_HAS + qualifier);
071                }
072                int colonIndex0 = qualifier.indexOf(':', 1);
073                validateColon(qualifier, colonIndex0);
074                int colonIndex1 = qualifier.indexOf(':', colonIndex0 + 1);
075                validateColon(qualifier, colonIndex1);
076                
077                myTargetResourceType = qualifier.substring(1, colonIndex0);
078                myOwningFieldName = qualifier.substring(colonIndex0 + 1, colonIndex1);
079                myParameterName = qualifier.substring(colonIndex1 + 1);
080                myParameterValue = theValue;
081        }
082
083        public String getOwningFieldName() {
084                return myOwningFieldName;
085        }
086
087        public String getParameterName() {
088                return myParameterName;
089        }
090
091        public String getParameterValue() {
092                return myParameterValue;
093        }
094
095        public String getTargetResourceType() {
096                return myTargetResourceType;
097        }
098
099        private static void validateColon(String theParameterName, int colonIndex) {
100                if (colonIndex == -1) {
101                        throwInvalidSyntaxException(theParameterName);
102                }
103        }
104
105
106        private static void throwInvalidSyntaxException(String theParameterName) {
107                throw new InvalidRequestException("Invalid _has parameter syntax: " + theParameterName);
108        }
109
110}