001    // Copyright 2011 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.services.ajax;
016    
017    import org.apache.tapestry5.json.JSONObject;
018    
019    /**
020     * A callback used with {@link AjaxResponseRenderer#addCallback(JSONCallback)}.
021     *
022     * @since 5.3
023     */
024    public interface JSONCallback
025    {
026        /**
027         * Modify the reply, typically by adding additional keys.
028         *
029         * @param reply the reply JSON object to be sent to the client
030         */
031        void run(JSONObject reply);
032    
033    }