/*
    * 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.view.facelets.tag.composite;
  
  import java.io.IOException;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  
  import javax.faces.component.UIComponent;
  import javax.faces.view.facelets.FaceletContext;
  import javax.faces.view.facelets.TagConfig;
  import javax.faces.view.facelets.TagHandler;
  
  import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletTag;
  import org.apache.myfaces.view.facelets.AbstractFaceletContext;
  import org.apache.myfaces.view.facelets.FaceletCompositionContext;
  import org.apache.myfaces.view.facelets.tag.ComponentContainerHandler;
  
  /**
   * @author Leonardo Uribe (latest modification by $Author$)
   * @version $Revision$ $Date$
   */
  @JSFFaceletTag(name="composite:insertChildren")
  public class InsertChildrenHandler extends TagHandler implements ComponentContainerHandler
  {
      public static final String INSERT_CHILDREN_USED = "org.apache.myfaces.INSERT_CHILDREN_USED";
      
      private static final Logger log = Logger.getLogger(InsertChildrenHandler.class.getName());
  
      public InsertChildrenHandler(TagConfig config)
      {
          super(config);
      }
  
      public void apply(FaceletContext ctx, UIComponent parent)
              throws IOException
      {
          UIComponent parentCompositeComponent
                  = FaceletCompositionContext.getCurrentInstance(ctx).getCompositeComponentFromStack();
          
          AbstractFaceletContext actx = (AbstractFaceletContext) ctx;
  
          if (actx.isBuildingCompositeComponentMetadata())
          {
              CompositeComponentBeanInfo beanInfo = 
                  (CompositeComponentBeanInfo) parentCompositeComponent.getAttributes()
                  .get(UIComponent.BEANINFO_KEY);
              
              if (beanInfo == null)
              {
                  if (log.isLoggable(Level.SEVERE))
                  {
                      log.severe("Cannot find composite bean descriptor UIComponent.BEANINFO_KEY ");
                  }
                  return;
              }
              
              beanInfo.getBeanDescriptor().setValue(INSERT_CHILDREN_USED, Boolean.TRUE);
          }
          else
          {
              actx.includeCompositeComponentDefinition(parent, null);
          }
      }
  
  }