pointcut.java

spring的源代码

/*
 * Copyright 2002-2005 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;

/**
 * Core Spring pointcut abstraction.
 * A pointcut is composed of a ClassFilter and a MethodMatcher. Both these
 * basic terms and a Pointcut itself can be combined to build up combinations.
 *
 * @author Rod Johnson
 * @see ClassFilter
 * @see MethodMatcher
 * @see org.springframework.aop.support.ClassFilters
 * @see org.springframework.aop.support.MethodMatchers
 * @see org.springframework.aop.support.ComposablePointcut
 */
public interface Pointcut {

	/**
	 * Return the ClassFilter for this pointcut.
	 */
	ClassFilter getClassFilter();

	/**
	 * Return the MethodMatcher for this pointcut.
	 */
	MethodMatcher getMethodMatcher();

	// could add getFieldMatcher() without breaking most existing code


	/**
	 * Canonical Pointcut instance that always matches.
	 */
	Pointcut TRUE = TruePointcut.INSTANCE;

}