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.wicket.model.models;
  
  import java.util.ArrayList;
  import java.util.stream.Collectors;
  
  import org.apache.wicket.model.IModel;
  import org.apache.wicket.model.Model;
  
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.object.ManagedObjects;
  import org.apache.causeway.core.metamodel.objectmanager.memento.ObjectMemento;
  
  import lombok.extern.log4j.Log4j2;
  
  /**
   * For widgets that use a <tt>org.wicketstuff.select2.Select2MultiChoice</tt>;
   * synchronizes the {@link Model} of the <tt>Select2MultiChoice</tt>
   * with the parent {@link UiAttributeWkt}, allowing also for pending values.
   */
  @Log4j2
  public record MultiChoiceModel(
      /**
       * chaining idiom: the {@link UiAttributeWkt} we are chained to
       */
      UiAttributeWkt attributeModel)
  implements
      IModel<ArrayList<ObjectMemento>>,
      AttributeModelWithChoice<ArrayList<ObjectMemento>> {
  
      @Override
      public ArrayList<ObjectMemento> getObject() {
  
          var packedValue = pendingValue().getValue().getValue();
          var unpackedValues = ManagedObjects.unpack(packedValue);
  
          log.debug("getObject() as unpackedValue {}", unpackedValues);
  
          var mementos = unpackedValues.stream()
          .map(ManagedObject::getMementoElseFail)
          .collect(Collectors.toCollection(()->new ArrayList<ObjectMemento>()));
  
          log.debug("getObject() as unpackedMemento {}", mementos);
          return mementos;
      }
  
      @Override
      public void setObject(final ArrayList<ObjectMemento> unpackedMemento) {
          log.debug("setObject() as unpackedMemento {}", unpackedMemento);
          var logicalType = attributeModel().getElementType().logicalType();
          var packedMemento = ObjectMemento.packed(logicalType, unpackedMemento);
          pendingValue().getValue().setValue(getObjectManager().demementify(packedMemento));
      }
  
      @Override
      public void detach() {
          attributeModel.detach();
      }
  
  }
  