1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20 package javax.servlet; 21 22 import java.io.IOException; 23 24 /** 25 * A FilterChain is an object provided by the servlet container to the developer 26 * giving a view into the invocation chain of a filtered request for a resource. Filters 27 * use the FilterChain to invoke the next filter in the chain, or if the calling filter 28 * is the last filter in the chain, to invoke the resource at the end of the chain. 29 * 30 * @see Filter 31 * @since Servlet 2.3 32 **/ 33 34 public interface FilterChain { 35 36 /** 37 * Causes the next filter in the chain to be invoked, or if the calling filter is the last filter 38 * in the chain, causes the resource at the end of the chain to be invoked. 39 * 40 * @param request the request to pass along the chain. 41 * @param response the response to pass along the chain. 42 * 43 * @since 2.3 44 */ 45 46 public void doFilter ( ServletRequest request, ServletResponse response ) throws IOException, ServletException; 47 48 } 49