/*
* 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 PhaseListenerTag extends TagSupport
{
private static final L10N L = new L10N(PhaseListenerTag.class);
private ValueExpression _typeExpr;
private ValueExpression _bindingExpr;
public void setType(ValueExpression type)
{
_typeExpr = type;
}
public void setBinding(ValueExpression binding)
{
_bindingExpr = binding;
}
public int doStartTag()
throws JspException
{
FacesContext context = FacesContext.getCurrentInstance();
UIComponentTagBase viewTag = findRootView();
if (viewTag == null)
throw new JspException(L.l("f:phaseListener must be nested inside a f:view tag."));
if (viewTag.getCreated()) {
UIViewRoot viewRoot = (UIViewRoot) viewTag.getComponentInstance();
PhaseListener listener = null;
ELContext elContext = context.getELContext();
if (_bindingExpr != null)
listener = (PhaseListener) _bindingExpr.getValue(elContext);
if (listener == null && _typeExpr != null) {
String type = (String) _typeExpr.getValue(elContext);
try {
ClassLoader loader = Thread.currentThread().getContextClassLoader();
Class cl = Class.forName(type, false, loader);
// XXX: messages
listener = (PhaseListener) cl.newInstance();
} catch (Exception e) {
throw new JspException(e);
}
if (_bindingExpr != null)
_bindingExpr.setValue(elContext, listener);
}
viewRoot.addPhaseListener(listener);
}
return SKIP_BODY;
}
private UIComponentTagBase findRootView()
{
UIComponentTagBase compTag = null;
for (Tag tag = this; tag != null; tag = tag.getParent()) {
if (! (tag instanceof UIComponentTagBase))
continue;
compTag = (UIComponentTagBase) tag;
}
return compTag;
}
}