    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
    015    package org.apache.tapestry5.internal.services;
    016
    017    import org.apache.tapestry5.internal.structure.Page;
    018    import org.apache.tapestry5.services.ComponentClassResolver;
    019    import org.apache.tapestry5.services.ComponentEventResultProcessor;
    020
    021    import 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     */
    027    public 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    }