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