001    // Copyright 2010 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.services;
016    
017    import java.io.IOException;
018    
019    /**
020     * Filter contributed into the {@link ComponentRequestHandler} pipeline to set the
021     * {@link RequestGlobals#getActivePageName() activePageName property}.
022     * 
023     * @since 5.2.0
024     */
025    public class InitializeActivePageName implements ComponentRequestFilter
026    {
027        private final RequestGlobals globals;
028    
029        public InitializeActivePageName(RequestGlobals globals)
030        {
031            this.globals = globals;
032        }
033    
034        public void handleComponentEvent(ComponentEventRequestParameters parameters,
035                ComponentRequestHandler handler) throws IOException
036        {
037            globals.storeActivePageName(parameters.getActivePageName());
038    
039            handler.handleComponentEvent(parameters);
040        }
041    
042        public void handlePageRender(PageRenderRequestParameters parameters,
043                ComponentRequestHandler handler) throws IOException
044        {
045            globals.storeActivePageName(parameters.getLogicalPageName());
046    
047            handler.handlePageRender(parameters);
048        }
049    
050    }