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.viewer.restfulobjects.rendering.domainobjects;
  
  import jakarta.ws.rs.core.MediaType;
  
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.spec.ObjectSpecification;
  import org.apache.causeway.core.metamodel.spec.feature.HasObjectFeature;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectFeature;
  import org.apache.causeway.viewer.restfulobjects.applib.JsonRepresentation;
  import org.apache.causeway.viewer.restfulobjects.applib.Rel;
  import org.apache.causeway.viewer.restfulobjects.rendering.IResourceContext;
  import org.apache.causeway.viewer.restfulobjects.rendering.LinkFollowSpecs;
  import org.apache.causeway.viewer.restfulobjects.rendering.ReprRendererAbstract;
  import org.apache.causeway.viewer.restfulobjects.rendering.ReprRendererException;
  import org.apache.causeway.viewer.restfulobjects.rendering.service.valuerender.JsonValueConverter;
  
  import lombok.Getter;
  
  public class ScalarValueReprRenderer
  extends ReprRendererAbstract<ManagedObject>
  implements HasObjectFeature {
  
      private ObjectSpecification returnType;
      @Getter(onMethod_ = {@Override}) private ObjectFeature objectFeature;
  
      public ScalarValueReprRenderer(
              final IResourceContext resourceContext,
              final ObjectFeature objectFeature,
              final LinkFollowSpecs linkFollower,
              final JsonRepresentation representation) {
          // null for representationType (there is none)
          super(resourceContext, linkFollower, null, representation);
          this.objectFeature = objectFeature;
      }
  
      /**
       * Fail early...
       *
       * <p>
       * In case I forget in the future that scalar values don't have a representation.
       */
      @Override
      public MediaType getMediaType() {
          throw new UnsupportedOperationException("no mediaType defined for scalar values");
      }
  
      @Override
      public ScalarValueReprRenderer with(final ManagedObject objectAdapter) {
          if (!objectAdapter.objSpec().isValue()) {
              throw ReprRendererException.create("Not an (encodable) value", objectAdapter.getTitle());
          }
  
          var context = JsonValueConverter.Context.of(
                  getObjectFeature(),
                  getResourceContext().config().isSuppressMemberExtensions());
          final Object value = jsonValueEncoder.asObject(objectAdapter, context);
  
          representation.mapPut("value", value);
          return this;
      }
  
      @Override
      public JsonRepresentation render() {
  
          addLinkToReturnType();
  
          getExtensions();
  
          return representation;
      }
  
      public ScalarValueReprRenderer withReturnType(final ObjectSpecification returnType) {
          this.returnType = returnType;
          return this;
      }
  
      private void addLinkToReturnType() {
          addLink(Rel.RETURN_TYPE, returnType);
      }
  
  }
  