/*
* $Id: AddTag.java 471754 2006-11-06 14:55:09Z husted $
*
* 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.struts.tiles.taglib;
import javax.servlet.jsp.JspException;
/**
* Add an element to the surrounding list tag.
* Same syntax as <code><put></code>.
*/
public class AddTag extends PutTag {
/**
* default constructor
*/
public AddTag() {
super();
}
/**
* Call parent tag which must implement AttributeContainer.
* @throws JspException If we can't find an appropriate enclosing tag.
*/
protected void callParent() throws JspException
{
// Get enclosing parent
AddTagParent enclosingParent = findEnclosingPutListTagParent();
enclosingParent.processNestedTag( this );
}
/**
* Find parent tag which must implement AttributeContainer.
* @throws JspException If we can't find an appropriate enclosing tag.
*/
protected AddTagParent findEnclosingPutListTagParent() throws JspException {
try
{
AddTagParent parent = (AddTagParent)findAncestorWithClass(this,AddTagParent.class);
if( parent == null )
{
throw new JspException( "Error - tag add : enclosing tag doesn't accept 'add' tag." );
}
return parent;
}
catch( ClassCastException ex )
{
throw new JspException( "Error - tag add : enclosing tag doesn't accept 'add' tag." , ex);
}
}
}