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.panels;
  
  import org.apache.wicket.markup.html.form.Form;
  import org.apache.wicket.model.IModel;
  
  import org.apache.causeway.core.metamodel.context.HasMetaModelContext;
  import org.apache.causeway.viewer.wicket.ui.app.registry.ComponentFactoryRegistry;
  import org.apache.causeway.viewer.wicket.ui.app.registry.HasComponentFactoryRegistry;
  import org.apache.causeway.viewer.wicket.ui.pages.HasPageClassRegistry;
  import org.apache.causeway.viewer.wicket.ui.pages.PageClassRegistry;
  
  public abstract class FormAbstract<T> extends Form<T>
  implements
      HasMetaModelContext,
      HasComponentFactoryRegistry,
      HasPageClassRegistry {
  
      private static final long serialVersionUID = 1L;
  
      protected FormAbstract(final String id) {
          super(id);
      }
  
      protected FormAbstract(final String id, final IModel<T> model) {
          super(id, model);
      }
  
      // -- DEPENDENCIES
  
      private transient ComponentFactoryRegistry componentFactoryRegistry;
      @Override
      public final ComponentFactoryRegistry getComponentFactoryRegistry() {
          if(componentFactoryRegistry==null) {
              componentFactoryRegistry = ((HasComponentFactoryRegistry) getApplication()).getComponentFactoryRegistry();
          }
          return componentFactoryRegistry;
      }
  
      private transient PageClassRegistry pageClassRegistry;
      @Override
      public final PageClassRegistry getPageClassRegistry() {
          if(pageClassRegistry==null) {
              pageClassRegistry = ((HasPageClassRegistry) getApplication()).getPageClassRegistry();
          }
          return pageClassRegistry;
      }
  
  }
  