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.core.metamodel.facets.object.choices.enums;
  
  import java.util.function.BiConsumer;
  import java.util.stream.Collectors;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.core.metamodel.consent.InteractionInitiatedBy;
  import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
  import org.apache.causeway.core.metamodel.facets.objectvalue.choices.ChoicesFacetAbstract;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  
  import org.jspecify.annotations.NonNull;
  
  public class ChoicesFacetFromEnum
  extends ChoicesFacetAbstract {
  
      private final @NonNull Can<ManagedObject> choices;
  
      public ChoicesFacetFromEnum(final FacetHolder holder, final Class<?> enumClass) {
          super(holder);
  
          final Object[] choices = enumClass.getEnumConstants();
  
          var elementSpec = specForTypeElseFail(enumClass);
          this.choices = Can.ofArray(choices)
                  .map(choice->ManagedObject.value(elementSpec, choice));
      }
  
      @Override
      public Can<ManagedObject> getChoices(
              final ManagedObject adapter,
              final InteractionInitiatedBy interactionInitiatedBy) {
          return choices;
      }
  
      @Override
      public void visitAttributes(final BiConsumer<String, Object> visitor) {
          super.visitAttributes(visitor);
          visitor.accept("choices",
                  choices.stream()
                  .map(ManagedObject::getPojo)
                  .map(Enum.class::cast)
                  .map(Enum::name)
                  .collect(Collectors.joining(", ")));
  
      }
  }
  