001// Copyright 2006, 2007, 2008 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.internal.structure.Page;
018import org.apache.tapestry5.services.ComponentEventResultProcessor;
019
020import java.io.IOException;
021
022/**
023 * Used when a component event handler returns a string value. The value is interpreted as the logical name of a page. A
024 * link to the page will be sent as a redirect.
025 */
026public class PageNameComponentEventResultProcessor implements ComponentEventResultProcessor<String>
027{
028    private final RequestPageCache requestPageCache;
029
030    private final ActionRenderResponseGenerator generator;
031
032    public PageNameComponentEventResultProcessor(RequestPageCache requestPageCache,
033                                                 ActionRenderResponseGenerator generator)
034    {
035        this.requestPageCache = requestPageCache;
036        this.generator = generator;
037    }
038
039    public void processResultValue(String value) throws IOException
040    {
041        Page page = requestPageCache.get(value);
042
043        generator.generateResponse(page);
044    }
045}