    001// Copyright 2008-2013 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;
    016
    017/**
    018 * Constants for persistent field strategies.
    019 *
    020 * @see org.apache.tapestry5.annotations.Persist#value()
    021 */
    022public class PersistenceConstants
    023{
    024    /**
    025     * The field's value is stored in the {@link org.apache.tapestry5.http.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     * The field's value is stored 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}