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Java > Open Source Codes > org > springframework > aop > support > annotation > AnnotationClassFilter


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.support.annotation;
18
19 import java.lang.annotation.Annotation JavaDoc;
20
21 import org.springframework.aop.ClassFilter;
22 import org.springframework.util.Assert;
23
24 /**
25  * Simple ClassFilter that looks for a specific Java 5 annotation
26  * being present on a class.
27  *
28  * @author Juergen Hoeller
29  * @since 2.0
30  * @see AnnotationMatchingPointcut
31  */
32 public class AnnotationClassFilter implements ClassFilter {
33
34     private final Class JavaDoc<? extends Annotation JavaDoc> annotationType;
35
36
37     /**
38      * Create a new AnnotationClassFilter for the given annotation type.
39      * @param annotationType the annotation type to look for
40      */
41     public AnnotationClassFilter(Class JavaDoc<? extends Annotation JavaDoc> annotationType) {
42         Assert.notNull(annotationType, "Annotation type must not be null");
43         this.annotationType = annotationType;
44     }
45
46
47     public boolean matches(Class JavaDoc clazz) {
48         return clazz.isAnnotationPresent(this.annotationType);
49     }
50
51 }
52
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