01: // Copyright 2006 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.services;
16:
17: import java.io.IOException;
18:
19: import javax.servlet.http.HttpServletRequest;
20: import javax.servlet.http.HttpServletResponse;
21:
22: /**
23: *
24: * @see org.apache.tapestry.services.HttpServletRequestHandler
25: */
26: public interface HttpServletRequestFilter {
27: /**
28: * Filter interface for the tapestry.request.HttpServletRequestHandler pipeline. A filter should
29: * delegate to the handler. It may perform operations before or after invoking the handler, and
30: * may modify the request and response passed in to the handler.
31: *
32: * @return true if the request has been handled, false otherwise
33: */
34: boolean service(HttpServletRequest request,
35: HttpServletResponse response,
36: HttpServletRequestHandler handler) throws IOException;
37: }
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