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.conmap;
  
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  
  import jakarta.ws.rs.core.MediaType;
  
  import org.apache.causeway.commons.internal.base._NullSafe;
  
  /**
   *
   * @since 1.x {@index}
   */
  public interface ContentMappingService {
  
      /**
       * Typically for mapping from a domain object to a DTO.
       */
      Object map(
              Object object,
              final List<MediaType> acceptableMediaTypes);
  
      /**
       * Convenience utilities for implementations of {@link ContentMappingService}.
       */
      default boolean isSupported(
              final Class<?> clazz,
              final List<MediaType> acceptableMediaTypes) {
          final String domainType = determineDomainType(acceptableMediaTypes);
          return clazz.getName().equals(domainType);
      }
  
      default String determineDomainType(final List<MediaType> acceptableMediaTypes) {
          for (MediaType acceptableMediaType : acceptableMediaTypes) {
              final Map<String, String> parameters = acceptableMediaType.getParameters();
              final String domainType = parameters.get("x-ro-domain-type");
              if(domainType != null) {
                  return domainType;
              }
          }
          throw new IllegalArgumentException(
                  "Could not locate x-ro-domain-type parameter in any of the provided media types; got: " +
                          _NullSafe.stream(acceptableMediaTypes)
                                  .filter(_NullSafe::isPresent)
                                  .map(Object::toString)
                                  .collect(Collectors.joining(", ")) );
      }
  
  }
  