content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   */
  package org.apache.causeway.applib.services.acceptheader;
  
  import java.util.List;
  
  import jakarta.ws.rs.core.MediaType;
  
  /**
   * This service simply exposes the HTTP `Accept` header to the domain.
   *
   * <p>
   * Its intended use is to support multiple versions of a REST API, where the
   * responsibility for content negotiation (determining which version of the
   * REST API is to be used) is managed by logic in the domain objects themselves.
   *
   * </p>
   *
   * @since 1.x {@index}
   */
  public interface AcceptHeaderService {
      /**
       * The intention is that this service only returns a list when the request
       * is initiated through the _Restful Objects viewer_.
       *
       * <p>
       * Otherwise the service will likely return `null`.
       * </p>
       */
      List<MediaType> getAcceptableMediaTypes();
  }
  