/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsf.taglib;
import java.io.*;
import java.util.*;
import javax.el.*;
import javax.faces.*;
import javax.faces.component.*;
import javax.faces.context.*;
import javax.faces.event.*;
import javax.faces.render.*;
import javax.faces.webapp.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import com.caucho.util.*;
public class ActionListenerTag extends TagSupport
{
private static final L10N L = new L10N(ActionListenerTag.class);
private ValueExpression _type;
private ValueExpression _binding;
public void setType(ValueExpression type)
{
_type = type;
}
public void setBinding(ValueExpression binding)
{
_binding = binding;
}
public int doStartTag()
throws JspException
{
FacesContext context = FacesContext.getCurrentInstance();
UIComponentClassicTagBase parent;
parent = UIComponentClassicTagBase.getParentUIComponentClassicTagBase(this.pageContext);
if (parent == null)
throw new JspException(L.l("f:actionListener must be nested inside a UIComponent tag."));
UIComponent parentComp = parent.getComponentInstance();
if (! (parentComp instanceof ActionSource)) {
throw new JspException(L.l("f:actionListener must be nested inside an ActionSource UIComponent tag."));
}
ActionSource actionComp = (ActionSource) parentComp;
ActionListener listener = null;
if (parent.getCreated()) {
ValueExpression bindingExpr = null;
if (_binding != null) {
listener = (ActionListener) _binding.getValue(context.getELContext());
}
if (listener == null && _type != null) {
String className = (String) _type.getValue(context.getELContext());
if (className != null) {
try {
Thread thread = Thread.currentThread();
ClassLoader loader = thread.getContextClassLoader();
Class cl = Class.forName(className, false, loader);
listener = (ActionListener) cl.newInstance();
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new JspException(e);
}
}
}
if (listener == null)
throw new JspException(L.l("f:actionListener cannot create an actionListener"));
actionComp.addActionListener(listener);
if (bindingExpr != null)
bindingExpr.setValue(context.getELContext(), listener);
}
return SKIP_BODY;
}
}