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Java > Open Source Codes > javax > servlet > FilterChain


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 JavaDoc;
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 JavaDoc request, ServletResponse JavaDoc response ) throws IOException JavaDoc, ServletException JavaDoc;
44
45 }
46
47
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