/*
* 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.taglib.core;
import org.apache.myfaces.shared_impl.util.ClassUtils;
import javax.faces.component.ActionSource;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.faces.event.ActionListener;
import javax.faces.webapp.UIComponentTag;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;
import javax.servlet.jsp.tagext.TagSupport;
/**
* This tag creates an instance of the specified ActionListener, and
* associates it with the nearest parent UIComponent.
*
* Unless otherwise specified, all attributes accept static values
* or EL expressions.
*
* @JSFJspTag
* name="f:actionListener"
* bodyContent="empty"
*
* @author Manfred Geiler (latest modification by $Author: lu4242 $)
* @version $Revision: 659857 $ $Date: 2008-05-24 13:17:47 -0500 (Sat, 24 May 2008) $
*/
public class ActionListenerTag
extends TagSupport
{
//private static final Log log = LogFactory.getLog(ActionListenerTag.class);
private static final long serialVersionUID = -2021978765020549175L;
private String _type = null;
public ActionListenerTag()
{
}
/**
* The fully qualified class name of the ActionListener class.
*
* @JSFJspAttribute
* required="true"
*/
public void setType(String type)
{
_type = type;
}
public int doStartTag() throws JspException
{
if (_type == null)
{
throw new JspException("type attribute not set");
}
//Find parent UIComponentTag
UIComponentTag componentTag = UIComponentTag.getParentUIComponentTag(pageContext);
if (componentTag == null)
{
throw new JspException("ActionListenerTag has no UIComponentTag ancestor");
}
if (componentTag.getCreated())
{
//Component was just created, so we add the Listener
UIComponent component = componentTag.getComponentInstance();
if (component instanceof ActionSource)
{
String className;
if (UIComponentTag.isValueReference(_type))
{
FacesContext facesContext = FacesContext.getCurrentInstance();
ValueBinding vb = facesContext.getApplication().createValueBinding(_type);
className = (String)vb.getValue(facesContext);
}
else
{
className = _type;
}
ActionListener al = (ActionListener)ClassUtils.newInstance(className);
((ActionSource)component).addActionListener(al);
}
else
{
throw new JspException("Component " + component.getId() + " is no ActionSource");
}
}
return Tag.SKIP_BODY;
}
}