/*
    * 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.ui.commons.wizards;
  
  import java.io.Serializable;
  import org.apache.commons.lang3.SerializationUtils;
  import org.apache.wicket.PageReference;
  import org.apache.wicket.event.IEventSink;
  
  public abstract class AbstractModalPanelBuilder<T extends Serializable> implements ModalPanelBuilder<T> {
  
      private static final long serialVersionUID = 5241745929825564456L;
  
      protected final PageReference pageRef;
  
      private final T defaultItem;
  
      private T item;
  
      protected IEventSink eventSink;
  
      /**
       * Construct.
       *
       * @param defaultItem default item.
       * @param pageRef Caller page reference.
       */
      public AbstractModalPanelBuilder(final T defaultItem, final PageReference pageRef) {
          this.defaultItem = defaultItem;
          this.pageRef = pageRef;
      }
  
      protected void onCancelInternal(final T modelObject) {
      }
  
      protected Serializable onApplyInternal(final T modelObject) {
          // do nothing
          return null;
      }
  
      protected T getOriginalItem() {
          return item;
      }
  
      @Override
      public T getDefaultItem() {
          return defaultItem;
      }
  
      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);
      }
  
      @Override
      public AbstractModalPanelBuilder<T> setItem(final T item) {
          this.item = item;
          return this;
      }
  
      @Override
      public PageReference getPageReference() {
          return pageRef;
      }
  
      @Override
      public ModalPanelBuilder<T> setEventSink(final IEventSink eventSink) {
          this.eventSink = eventSink;
          return this;
      }
  
      @Override
      public IEventSink getEventSink() {
          return eventSink;
      }
  }