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.ui.app.registry;
  
  import java.io.Serializable;
  import java.util.Objects;
  
  import org.apache.wicket.model.LoadableDetachableModel;
  
  import org.apache.causeway.applib.services.registry.ServiceRegistry;
  import org.apache.causeway.core.metamodel.context.MetaModelContext;
  import org.apache.causeway.viewer.commons.model.components.UiComponentType;
  import org.apache.causeway.viewer.wicket.ui.ComponentFactory;
  
  import org.jspecify.annotations.NonNull;
  
  /**
   * Serializable key into the {@link ServiceRegistry} to lookup {@link ComponentFactory}s,
   * in order for the latter not having to be {@link Serializable}.
   */
  public record ComponentFactoryKey(
      Class<? extends ComponentFactory> factoryClass,
      String id,
      UiComponentType componentType,
      LoadableDetachableModel<ComponentFactory> componentFactoryLazy
      ) implements Serializable {
  
      public ComponentFactory componentFactory() {
          return componentFactoryLazy.getObject();
      }
  
      public ComponentFactoryKey(final @NonNull ComponentFactory componentFactory) {
          this(componentFactory, componentFactory.getClass());
      }
  
      private ComponentFactoryKey(
          final ComponentFactory componentFactory,
          final Class<? extends ComponentFactory> factoryClass) {
          this(
              /*factoryClass*/
              factoryClass,
              /*id*/
              componentFactory.getName(),
              /*componentType*/
              componentFactory.getComponentType(),
              /*componentFactoryLazy*/
              LoadableDetachableModel.of(()->MetaModelContext.instanceElseFail().getServiceRegistry()
                  .lookupServiceElseFail(ComponentFactoryRegistry.class)
                  .lookupFactoryElseFail(factoryClass)));
  
          componentFactoryLazy.setObject(componentFactory); // memoize
      }
  
      @Override
      public final boolean equals(final Object obj) {
          return obj instanceof ComponentFactoryKey other
              ? Objects.equals(this.factoryClass(), other.factoryClass())
              : false;
      }
  
      @Override
      public final int hashCode() {
          return factoryClass.hashCode();
      }
  
  }
  