/**
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.ajax4jsf.event;
import java.io.Serializable;
import javax.faces.component.StateHolder;
import javax.faces.component.UIComponentBase;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import org.ajax4jsf.event.AjaxEvent;
import org.ajax4jsf.event.AjaxListener;
/**
* Helper class to keep reference to listener binded as EL-expression.
* @author shura
*
*/
public class AjaxListenerHelper implements AjaxListener,StateHolder {
private ValueBinding _binding;
private boolean _transient = false;
/**
*
*/
public AjaxListenerHelper() {
super();
// TODO Auto-generated constructor stub
}
/**
* @param binding
*/
public AjaxListenerHelper(ValueBinding binding) {
super();
if (null == binding) {
throw new IllegalArgumentException("Binding expression for AjaxListener helper must be not null");
}
_binding = binding;
}
private AjaxListener getHandler(FacesContext context) {
return (AjaxListener) _binding.getValue(context);
}
/* (non-Javadoc)
* @see javax.faces.component.StateHolder#restoreState(javax.faces.context.FacesContext, java.lang.Object)
*/
public void restoreState(FacesContext context, Object state) {
State helperState = (State) state;
_binding = (ValueBinding) UIComponentBase.restoreAttachedState(context,helperState.binding);
}
/* (non-Javadoc)
* @see javax.faces.component.StateHolder#saveState(javax.faces.context.FacesContext)
*/
public Object saveState(FacesContext context) {
State helperState = new State();
helperState.binding = UIComponentBase.saveAttachedState(context,_binding);
return helperState;
}
/**
* @return Returns the transient.
*/
public boolean isTransient() {
return _transient;
}
/**
* @param transient1 The transient to set.
*/
public void setTransient(boolean transient1) {
_transient = transient1;
}
/**
* @author shura
*
*/
private static class State implements Serializable {
private Object binding;
}
public void processAjax(AjaxEvent event) {
FacesContext context = FacesContext.getCurrentInstance();
AjaxListener handler = getHandler(context);
handler.processAjax(event);
}
}