Spring Framework example source code file (TrueMethodMatcher.java)

This example Spring Framework source code file (TrueMethodMatcher.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

class, class, instance, instance, io, methodmatcher, object, object, reflection, serializable, string, truemethodmatcher, truemethodmatcher, unsupportedoperationexception

The Spring Framework TrueMethodMatcher.java source code

/*
 * 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;

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 pattern.
	 */
	private TrueMethodMatcher() {
	}

	public boolean isRuntime() {
		return false;
	}

	public boolean matches(Method method, Class targetClass) {
		return true;
	}

	public boolean matches(Method method, 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 <code>equals().
	 */
	private Object readResolve() {
		return INSTANCE;
	}
	
	public String toString() {
		return "MethodMatcher.TRUE";
	}

}