001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019 020 package javax.servlet; 021 022 import java.io.IOException; 023 024 /** 025 * A FilterChain is an object provided by the servlet container to the developer 026 * giving a view into the invocation chain of a filtered request for a resource. Filters 027 * use the FilterChain to invoke the next filter in the chain, or if the calling filter 028 * is the last filter in the chain, to invoke the resource at the end of the chain. 029 * 030 * @see Filter 031 * @since Servlet 2.3 032 **/ 033 034 public interface FilterChain { 035 036 /** 037 * Causes the next filter in the chain to be invoked, or if the calling filter is the last filter 038 * in the chain, causes the resource at the end of the chain to be invoked. 039 * 040 * @param request the request to pass along the chain. 041 * @param response the response to pass along the chain. 042 * 043 * @since 2.3 044 */ 045 046 public void doFilter ( ServletRequest request, ServletResponse response ) throws IOException, ServletException; 047 048 } 049