001/*
002 * #%L
003 * HAPI FHIR - Core Library
004 * %%
005 * Copyright (C) 2014 - 2025 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.rest.gclient;
021
022import ca.uhn.fhir.rest.server.exceptions.NotModifiedException;
023import org.hl7.fhir.instance.model.api.IBaseResource;
024
025public interface IReadIfNoneMatch<T extends IBaseResource> {
026
027        /**
028         * If the server responds with an <code>HTTP 301 Not Modified</code>,
029         * return the given instance.
030         */
031        IReadExecutable<T> returnResource(T theInstance);
032
033        /**
034         * If the server responds with an <code>HTTP 301 Not Modified</code>,
035         * return <code>null</code>.
036         */
037        IReadExecutable<T> returnNull();
038
039        /**
040         * If the server responds with an <code>HTTP 301 Not Modified</code>,
041         * throw a {@link NotModifiedException}.
042         */
043        IReadExecutable<T> throwNotModifiedException();
044}