TrueMethodMatcher.java
上传用户:jiancairen
上传日期:2007-08-27
资源大小:26458k
文件大小:2k
- /*
- * Copyright 2002-2004 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;
- import java.io.ObjectStreamException;
- import java.io.Serializable;
- import java.lang.reflect.Method;
- /**
- * Canonical MethodMatcher instance that matches all methods.
- * @author Rod Johnson
- */
- class TrueMethodMatcher implements MethodMatcher, Serializable {
-
- public static final TrueMethodMatcher INSTANCE = new TrueMethodMatcher();
-
- /**
- * Enforce Singleton
- */
- private TrueMethodMatcher() {
- }
- public boolean isRuntime() {
- return false;
- }
- public boolean matches(Method m, Class targetClass) {
- return true;
- }
- public boolean matches(Method m, Class targetClass, Object[] args) {
- // should never be invoked as isRuntime returns false
- throw new UnsupportedOperationException();
- }
-
- /**
- * Required to support serialization.
- * Replaces with canonical instance on deserialization,
- * protecting Singleton pattern.
- * Alternative to overriding equals().
- */
- private Object readResolve() throws ObjectStreamException {
- return INSTANCE;
- }
-
- public String toString() {
- return "MethodMatcher.TRUE";
- }
- }