    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
    015    package org.apache.tapestry5.internal.services;
    016
    017    import org.apache.tapestry5.Link;
    018    import org.apache.tapestry5.services.PersistentFieldChange;
    019    import 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     */
    025    public 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    }