/*
    * 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.syncope.client.enduser.panels;
  
  import java.io.Serializable;
  import org.apache.commons.lang3.SerializationUtils;
  import org.apache.wicket.PageReference;
  import org.apache.wicket.markup.html.panel.Panel;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public abstract class AbstractFormPanel<T extends Serializable> extends Panel {
  
      private static final long serialVersionUID = 6650311507433421554L;
  
      protected static final Logger LOG = LoggerFactory.getLogger(AbstractFormPanel.class);
  
      protected final PageReference pageRef;
  
      protected final T defaultItem;
  
      protected T item;
  
      public AbstractFormPanel(final String id, final T defaultItem, final PageReference pageReference) {
          super(id);
          this.defaultItem = defaultItem;
          this.pageRef = pageReference;
      }
  
      protected T getOriginalItem() {
          return item;
      }
  
      protected T newModelObject() {
          if (item == null) {
              // keep the original item: the which one before the changes performed during wizard browsing
              item = SerializationUtils.clone(defaultItem);
          }
  
          // instantiate a new model object and return it
          return SerializationUtils.clone(item);
      }
  
      public PageReference getPageReference() {
          return pageRef;
      }
  }