001// Copyright 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.ComponentClassResolver;
019import org.apache.tapestry5.services.ComponentEventResultProcessor;
020
021import java.io.IOException;
022
023/**
024 * Used when a component event handler returns a class value. The value is interpreted as the page class. A link to the
025 * page will be sent.
026 */
027public class ClassResultProcessor implements ComponentEventResultProcessor<Class>
028{
029    private final ComponentClassResolver resolver;
030
031    private final RequestPageCache requestPageCache;
032
033    private final ActionRenderResponseGenerator generator;
034
035    public ClassResultProcessor(ComponentClassResolver resolver, RequestPageCache requestPageCache,
036                                ActionRenderResponseGenerator generator)
037    {
038        this.resolver = resolver;
039        this.requestPageCache = requestPageCache;
040        this.generator = generator;
041    }
042
043    public void processResultValue(Class value) throws IOException
044    {
045        String className = value.getName();
046        String pageName = resolver.resolvePageClassNameToPageName(className);
047
048        Page page = requestPageCache.get(pageName);
049
050        generator.generateResponse(page);
051    }
052
053}