001// Copyright 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
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.http.Link;
018import org.apache.tapestry5.services.PersistentFieldChange;
019import org.apache.tapestry5.services.PersistentFieldStrategy;
020
021/**
022 * Describes an object that can store {@link PersistentFieldChange}s, and manage a query parameter stored into a {@link
023 * Link} to maining this data across requests.
024 */
025public interface ClientPersistentFieldStorage extends PersistentFieldStrategy
026{
027    /**
028     * Updates a link, adding a query parameter to it (if necessary) to store
029     *
030     * @param link
031     */
032    void updateLink(Link link);
033}