    001    // Copyright 2006, 2007, 2008, 2009 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.internal.services;
    016
    017    import org.apache.tapestry5.services.*;
    018
    019    import java.io.IOException;
    020
    021    /**
    022     * Dispatches incoming requests for render requests. Render requests consist of either just a logical page name (case
    023     * insensitive) or a logical page name plus additional context. Because of this structure, it take a little bit of work
    024     * to identify the split point between the page name and the context.
    025     */
    026    public class PageRenderDispatcher implements Dispatcher
    027    {
    028        private final ComponentRequestHandler componentRequestHandler;
    029
    030        private final ComponentEventLinkEncoder linkEncoder;
    031
    032        public PageRenderDispatcher(ComponentRequestHandler componentRequestHandler, ComponentEventLinkEncoder linkEncoder)
    033        {
    034            this.componentRequestHandler = componentRequestHandler;
    035            this.linkEncoder = linkEncoder;
    036        }
    037
    038        public boolean dispatch(Request request, final Response response) throws IOException
    039        {
    040
    041            PageRenderRequestParameters parameters = linkEncoder.decodePageRenderRequest(request);
    042
    043            if (parameters == null) return false;
    044
    045            componentRequestHandler.handlePageRender(parameters);
    046
    047            return true;
    048        }
    049    }