001// Copyright 2007, 2008, 2011 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.ioc.annotations.Primary;
018import org.apache.tapestry5.services.ComponentClassResolver;
019import org.apache.tapestry5.services.ComponentEventResultProcessor;
020import org.apache.tapestry5.services.Traditional;
021
022import java.io.IOException;
023
024/**
025 * Used when a component event handler returns a class value. The value is interpreted as the page class. A redirect
026 * to the page will be sent.
027 */
028public class ClassResultProcessor implements ComponentEventResultProcessor<Class>
029{
030    private final ComponentClassResolver resolver;
031
032    private final ComponentEventResultProcessor primary;
033
034    public ClassResultProcessor(ComponentClassResolver resolver,
035
036                                @Traditional @Primary
037                                ComponentEventResultProcessor primary)
038    {
039        this.resolver = resolver;
040        this.primary = primary;
041    }
042
043    public void processResultValue(Class value) throws IOException
044    {
045        String className = value.getName();
046
047        String pageName = resolver.resolvePageClassNameToPageName(className);
048
049        primary.processResultValue(pageName);
050    }
051
052}