01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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,
44: ServletResponse response) throws IOException,
45: ServletException;
46:
47: }
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