001package ca.uhn.fhir.rest.api;
002
003/*-
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2022 Smile CDR, Inc.
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import javax.annotation.Nullable;
024import java.util.HashMap;
025
026/**
027 * Represents values for "return" value as provided in the the <a href="https://tools.ietf.org/html/rfc7240#section-4.2">HTTP Prefer header</a>.
028 */
029public enum PreferReturnEnum {
030
031        REPRESENTATION(Constants.HEADER_PREFER_RETURN_REPRESENTATION),
032        MINIMAL(Constants.HEADER_PREFER_RETURN_MINIMAL),
033        OPERATION_OUTCOME(Constants.HEADER_PREFER_RETURN_OPERATION_OUTCOME);
034
035        private static HashMap<String, PreferReturnEnum> ourValues;
036        private final String myHeaderValue;
037
038        PreferReturnEnum(String theHeaderValue) {
039                myHeaderValue = theHeaderValue;
040        }
041
042        public String getHeaderValue() {
043                return myHeaderValue;
044        }
045
046        @Nullable
047        public static PreferReturnEnum fromHeaderValue(String theHeaderValue) {
048                if (ourValues == null) {
049                        HashMap<String, PreferReturnEnum> values = new HashMap<>();
050                        for (PreferReturnEnum next : PreferReturnEnum.values()) {
051                                values.put(next.getHeaderValue(), next);
052                        }
053                        ourValues = values;
054                }
055                return ourValues.get(theHeaderValue);
056        }
057
058}