annotationclassfilter.java

来自「struts+spring 源码 希望能给大家带来帮助」· Java 代码 · 共 51 行

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

package org.springframework.aop.support.annotation;

import java.lang.annotation.Annotation;

import org.springframework.aop.ClassFilter;
import org.springframework.util.Assert;

/**
 * Simple ClassFilter that looks for a specific Java 5 annotation
 * being present on a class.
 *
 * @author Juergen Hoeller
 * @since 2.0
 */
public class AnnotationClassFilter implements ClassFilter {

	private final Class<? extends Annotation> annotationType;


	/**
	 * Create a new AnnotationClassFilter for the given annotation type.
	 * @param annotationType the annotation type to look for
	 */
	public AnnotationClassFilter(Class<? extends Annotation> annotationType) {
		Assert.notNull(annotationType, "Annotation type must not be null");
		this.annotationType = annotationType;
	}


	public boolean matches(Class clazz) {
		return clazz.isAnnotationPresent(this.annotationType);
	}

}