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<?> clazz);
38
39
40 /**
41 * Canonical instance of a ClassFilter that matches all classes.
42 */
43 ClassFilter TRUE = TrueClassFilter.INSTANCE;
44
45 }