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Java > Open Source Codes > org > springframework > web > servlet > mvc > multiaction > MethodNameResolver


1 /*
2  * Copyright 2002-2006 the original author or authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16
17 package org.springframework.web.servlet.mvc.multiaction;
18
19 import javax.servlet.http.HttpServletRequest JavaDoc;
20
21 /**
22  * Interface that parameterizes the MultiActionController class
23  * using the <b>Strategy</b> GoF Design pattern, allowing
24  * the mapping from incoming request to handler method name
25  * to be varied without affecting other application code.
26  *
27  * <p>Illustrates how delegation can be more flexible than subclassing.
28  *
29  * @author Rod Johnson
30  * @see MultiActionController#setMethodNameResolver
31  */

32 public interface MethodNameResolver {
33     
34     /**
35      * Return a method name that can handle this request. Such
36      * mappings are typically, but not necessarily, based on URL.
37      * @param request current HTTP request
38      * @return a method name that can handle this request.
39      * Never returns <code>null</code>; throws exception if not resolvable.
40      * @throws NoSuchRequestHandlingMethodException if no handler method
41      * can be found for the given request
42      */

43     String JavaDoc getHandlerMethodName(HttpServletRequest JavaDoc request) throws NoSuchRequestHandlingMethodException;
44
45 }
46
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