/*

  * 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.jstl.core;

 import java.io.IOException;

 import javax.el.ELException;

 import javax.faces.FacesException;

 import javax.faces.component.UIComponent;

 import javax.faces.view.facelets.FaceletContext;

 import javax.faces.view.facelets.FaceletException;

 import javax.faces.view.facelets.TagAttribute;

 import javax.faces.view.facelets.TagConfig;

 import javax.faces.view.facelets.TagHandler;

 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletAttribute;

 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletTag;

 /**

  * Catches any Throwable that occurs in its body and optionally 

  * exposes it.

  * 

  * @author Jacob Hookom

  * @version $Id$

  */

 @JSFFaceletTag(name="c:catch")

 public final class CatchHandler extends TagHandler

 {

     /**

      * Name of the exported scoped variable for the

      * exception thrown from a nested action. The type of the

      * scoped variable is the type of the exception thrown.

      */

     @JSFFaceletAttribute(className="java.lang.String")

     private final TagAttribute var;

     /**

      * @param config

      */

     public CatchHandler(TagConfig config)

     {

         super(config);

         this.var = this.getAttribute("var");

     }

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

             ELException

     {

         try

         {

             this.nextHandler.apply(ctx, parent);

         }

         catch (Exception e)

         {

             if (this.var != null)

             {

                 ctx.setAttribute(this.var.getValue(ctx), e);

             }

         }

     }

 }