AjaxBehaviorListenerImpl.java

/*
 * Copyright 2011-2012 Blazebit
 *
 * Licensed 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 com.blazebit.blazefaces.behavior.ajax;

import java.io.Serializable;
import javax.el.ELContext;
import javax.el.MethodExpression;
import javax.el.MethodNotFoundException;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.AjaxBehaviorEvent;
import javax.faces.event.AjaxBehaviorListener;

/**
 *
 * @author Christian Beikov
 */
public class AjaxBehaviorListenerImpl implements AjaxBehaviorListener, Serializable {
    
    private static final long serialVersionUID = 1L;

    private MethodExpression listener;

    public AjaxBehaviorListenerImpl() {}

    public AjaxBehaviorListenerImpl(MethodExpression listener) {
        this.listener = listener;
    }

    public void processAjaxBehavior(AjaxBehaviorEvent event) throws AbortProcessingException {
        FacesContext context = FacesContext.getCurrentInstance();
        final ELContext elContext = context.getELContext();
        
        try{
            listener.invoke(elContext, new Object[]{});
        } catch (MethodNotFoundException mnfe) {
            MethodExpression argListener = context.getApplication().getExpressionFactory().
                        createMethodExpression(elContext, listener.getExpressionString(), null, new Class<?>[]{event.getClass()});
            
            argListener.invoke(elContext, new Object[]{event});
        }
    }
}