/*

  * 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 javax.faces.view.facelets;

 import java.io.IOException;

 import javax.faces.component.UIComponent;

 /**

  * A participant in UIComponent tree building

  * 

  * @since 2.0

  */

 public interface FaceletHandler

 {

     /**

      * Process changes on a particular UIComponent

      * 

      * @param ctx the current FaceletContext instance for this execution

      * @param parent the parent UIComponent to operate upon

      * @throws IOException

      * @throws javax.faces.FacesException

      * @throws FaceletException

      * @throws javax.el.ELException

      */

     public void apply(FaceletContext ctx, UIComponent parent)throws IOException;

 }