/*
 * 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.jetspeed.layout.impl;

import org.apache.jetspeed.ajax.AjaxRequestService;
import org.apache.jetspeed.pipeline.PipelineException;
import org.apache.jetspeed.pipeline.valve.Valve;
import org.apache.jetspeed.pipeline.valve.ValveContext;
import org.apache.jetspeed.request.RequestContext;

public class LayoutValve implements Valve
{

    // Ajax service handler
    AjaxRequestService ajaxService = null;

    public LayoutValve(AjaxRequestService ajaxService)
    {
        this.ajaxService = ajaxService;
    }

    public void initialize() throws PipelineException
    {
    }

    public void invoke(RequestContext requestContext,
            ValveContext valveContext) throws PipelineException
    {
        try
        {
            // Delegate the call to the AjaxService
            ajaxService.process(requestContext);

            if(valveContext != null) 
            {
                valveContext.invokeNext(requestContext);
            }            
        } 
        catch (Throwable t)
        {
            throw new PipelineException(t);
        }
    }
}
