001    // Copyright 2006, 2007 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.services.Request;
018    import org.apache.tapestry5.services.Session;
019    
020    /**
021     * A strategy for storing persistent page properties into the {@link Session session}.
022     * <p/>
023     * Builds attribute names as: <code>state:<em>page-name</em>:<em>component-id</em>:<em>field-name</em></code>
024     */
025    
026    public class SessionPersistentFieldStrategy extends AbstractSessionPersistentFieldStrategy
027    {
028        /**
029         * Prefix used to identify keys stored in the session that are being used to store persistent field data.
030         */
031        static final String PREFIX = "state:";
032    
033        public SessionPersistentFieldStrategy(Request request)
034        {
035            super(PREFIX, request);
036        }
037    }