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Java > Open Source Codes > org > springframework > aop > ClassFilter


1 /*
2  * Copyright 2002-2007 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.aop;
18
19 /**
20  * Filter that restricts matching of a pointcut or introduction to
21  * a given set of target classes.
22  *
23  * <p>Can be used as part of a {@link Pointcut} or for the entire
24  * targeting of an {@link IntroductionAdvisor}.
25  *
26  * @author Rod Johnson
27  * @see Pointcut
28  * @see MethodMatcher
29  */
30 public interface ClassFilter {
31
32     /**
33      * Should the pointcut apply to the given interface or target class?
34      * @param clazz the candidate target class
35      * @return whether the advice should apply to the given target class
36      */
37     boolean matches(Class JavaDoc clazz);
38
39
40     /**
41      * Canonical instance of a ClassFilter that matches all classes.
42      */
43     ClassFilter TRUE = TrueClassFilter.INSTANCE;
44
45 }
46
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