    001    // Copyright 2008, 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;
    016
    017    /**
    018     * Constants for persistent field strategies.
    019     *
    020     * @see org.apache.tapestry5.annotations.Persist#value()
    021     */
    022    public class PersistenceConstants
    023    {
    024        /**
    025         * The field's value is stored in the {@link org.apache.tapestry5.services.Session}.
    026         */
    027        public static final String SESSION = "session";
    028
    029        /**
    030         * The field's value is stored on the client, as a query parameter or hidden form field.
    031         */
    032        public static final String CLIENT = "client";
    033
    034        /**
    035         * A that stores data in the session, but only until the next request. This is often
    036         * used for confirmation messages presented to the user.
    037         */
    038        public static final String FLASH = "flash";
    039    }