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
015package org.apache.tapestry5.services;
016
017import java.io.IOException;
018
019import org.apache.tapestry5.http.services.RequestGlobals;
020
021/**
022 * Filter contributed into the {@link ComponentRequestHandler} pipeline to set the
023 * {@link RequestGlobals#getActivePageName() activePageName property}.
024 * 
025 * @since 5.2.0
026 */
027public class InitializeActivePageName implements ComponentRequestFilter
028{
029    private final RequestGlobals globals;
030
031    public InitializeActivePageName(RequestGlobals globals)
032    {
033        this.globals = globals;
034    }
035
036    public void handleComponentEvent(ComponentEventRequestParameters parameters,
037            ComponentRequestHandler handler) throws IOException
038    {
039        globals.storeActivePageName(parameters.getActivePageName());
040
041        handler.handleComponentEvent(parameters);
042    }
043
044    public void handlePageRender(PageRenderRequestParameters parameters,
045            ComponentRequestHandler handler) throws IOException
046    {
047        globals.storeActivePageName(parameters.getLogicalPageName());
048
049        handler.handlePageRender(parameters);
050    }
051
052}