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