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
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.services.*;
018
019import 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 */
026public 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}