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.commanddto.conmap;
  
  import java.util.List;
  
  import jakarta.annotation.Priority;
  import jakarta.inject.Inject;
  import jakarta.inject.Named;
  import jakarta.ws.rs.core.MediaType;
  
  import org.springframework.beans.factory.annotation.Qualifier;
  import org.jspecify.annotations.Nullable;
  import org.springframework.stereotype.Service;
  
  import org.apache.causeway.applib.CausewayModuleApplib;
  import org.apache.causeway.applib.annotation.PriorityPrecedence;
  import org.apache.causeway.applib.services.commanddto.HasCommandDto;
  import org.apache.causeway.applib.services.commanddto.processor.CommandDtoProcessor;
  import org.apache.causeway.applib.services.commanddto.processor.spi.CommandDtoProcessorService;
  import org.apache.causeway.applib.services.conmap.ContentMappingService;
  import org.apache.causeway.applib.services.metamodel.MetaModelService;
  import org.apache.causeway.schema.cmd.v2.CommandDto;
  
  /**
   * An implementation of {@link ContentMappingService}.
   * 
   * @since 2.0 {@index}
   */
  @Service
  @Named(ContentMappingServiceForCommandDto.LOGICAL_TYPE_NAME)
  @Priority(PriorityPrecedence.EARLY)
  @Qualifier("CommandDto")
  public class ContentMappingServiceForCommandDto implements ContentMappingService {
  
      static final String LOGICAL_TYPE_NAME = CausewayModuleApplib.NAMESPACE + ".ContentMappingServiceForCommandDto";
  
      @Override @Nullable
      public Object map(final Object object, final List<MediaType> acceptableMediaTypes) {
          final boolean supported = isSupported(CommandDto.class, acceptableMediaTypes);
          if(!supported) {
              return null;
          }
  
          return asProcessedDto(object);
      }
  
      @Nullable
      CommandDto asProcessedDto(final Object object) {
          var commandDto = asCommandDto(object);
          return asProcessedDto(object, commandDto);
      }
  
      @Nullable
      private CommandDto asCommandDto(final Object object) {
          if(object instanceof CommandDto) {
              return (CommandDto) object;
          }
          if(object instanceof HasCommandDto) {
              return ((HasCommandDto) object).getCommandDto();
          }
          return null;
      }
  
      @Nullable
      private CommandDto asProcessedDto(final Object domainObject, @Nullable CommandDto commandDto) {
  
          if(commandDto == null) {
              return null;
          }
  
          // global processors
          for (var commandDtoProcessorService : commandDtoProcessorServices) {
              commandDto = commandDtoProcessorService.process(domainObject, commandDto);
              if(commandDto == null) {
                  // any processor could return null, effectively breaking the chain.
                  return null;
              }
          }
  
          // specific processor for this specific member (action or property)
          var logicalMemberId = commandDto.getMember().getLogicalMemberIdentifier();
          final CommandDtoProcessor commandDtoProcessor =
                  metaModelService.commandDtoProcessorFor(logicalMemberId);
          if (commandDtoProcessor == null) {
              return commandDto;
          }
          return commandDtoProcessor.process(commandDto);
      }
  
      @Inject MetaModelService metaModelService;
      @Inject List<CommandDtoProcessorService> commandDtoProcessorServices;
  
  }
  