    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    }