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
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 */
025public 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}