/*
    * 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.myfaces.cdi.behavior;
  
  import javax.faces.FacesWrapper;
  import javax.faces.component.PartialStateHolder;
  import javax.faces.component.behavior.Behavior;
  import javax.faces.context.FacesContext;
  import javax.faces.event.BehaviorEvent;
  import org.apache.myfaces.cdi.util.CDIUtils;
  
  /**
   *
   */
  public class FacesBehaviorCDIWrapper implements PartialStateHolder, Behavior, FacesWrapper<Behavior>
  {
      private transient Behavior delegate;
      
      private String behaviorId;
      private boolean _transient;
  
      public FacesBehaviorCDIWrapper()
      {
      }
  
      public FacesBehaviorCDIWrapper(Class<? extends Behavior> behaviorClass, String behaviorId)
      {
          this.behaviorId = behaviorId;
      }
      
      @Override
      public void broadcast(BehaviorEvent event)
      {
          getWrapped().broadcast(event);
      }
  
      @Override
      public Behavior getWrapped()
      {
          if (delegate == null)
          {
              delegate = (Behavior) CDIUtils.getInstance(CDIUtils.getBeanManager(
                  FacesContext.getCurrentInstance().getExternalContext()), 
                      Behavior.class, true, new FacesBehaviorAnnotationLiteral(behaviorId, true));
          }
          return delegate;
      }
      
      @Override
      public Object saveState(FacesContext context)
      {
          if (!initialStateMarked())
          {
              Object values[] = new Object[1];
              values[0] = behaviorId;
              return values;
          }
          return null;
      }
  
      @Override
      public void restoreState(FacesContext context, Object state)
      {
          if (state != null)
          {
              Object values[] = (Object[])state;
              behaviorId = (String)values[0];
          }
      }
  
      @Override
      public boolean isTransient()
      {
          return _transient;
      }
  
      @Override
      public void setTransient(boolean newTransientValue)
      {
          _transient = newTransientValue;
      }
  
     private boolean _initialStateMarked = false;
 
     public void clearInitialState()
     {
         _initialStateMarked = false;
     }
 
     public boolean initialStateMarked()
     {
         return _initialStateMarked;
     }
 
     public void markInitialState()
     {
         _initialStateMarked = true;
     }
 
 }