1 // ======================================================================== 2 // Copyright 2007 Dojo Foundation 3 // ------------------------------------------------------------------------ 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 //======================================================================== 14 15 package dojox.cometd; 16 17 18 /* ------------------------------------------------------------ */ 19 /** Data Filter 20 * Data filters are used to transform data as it is sent to a Channel. 21 * 22 */ 23 public interface DataFilter 24 { 25 /** 26 * @param from 27 * @param to TODO 28 * @param data 29 * @return The filtered data. 30 * @throws IllegalStateException If the message should be aborted 31 */ 32 Object filter(Client from, Channel to, Object data) throws IllegalStateException; 33 }