Spring Framework example source code file (MethodMatchersTests.java)

This example Spring Framework source code file (MethodMatchersTests.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, dynamicmethodmatcher, exception, exception, exception_getmessage, matched, method, methodmatcher, methodmatcher, object, reflection, startswithmatcher, startswithmatcher, testdynamicmethodmatcherwhichdoesnotmatch

The Spring Framework MethodMatchersTests.java source code

/*
 * 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.support;

import java.lang.reflect.Method;

import junit.framework.TestCase;

import org.springframework.aop.MethodMatcher;
import org.springframework.beans.IOther;
import org.springframework.beans.ITestBean;
import org.springframework.beans.TestBean;
import org.springframework.util.SerializationTestUtils;

/**
 * $Id: MethodMatchersTests.java,v 1.7 2005/03/25 09:28:18 jhoeller Exp $
 */
public class MethodMatchersTests extends TestCase {

	private final Method EXCEPTION_GETMESSAGE;

	private final Method ITESTBEAN_SETAGE;
	
	private final Method ITESTBEAN_GETAGE;
	
	private final Method IOTHER_ABSQUATULATE;

	public MethodMatchersTests() throws Exception {
		EXCEPTION_GETMESSAGE = Exception.class.getMethod("getMessage", (Class[]) null);
		ITESTBEAN_GETAGE = ITestBean.class.getMethod("getAge", (Class[]) null);
		ITESTBEAN_SETAGE = ITestBean.class.getMethod("setAge", new Class[] { int.class });
		IOTHER_ABSQUATULATE = IOther.class.getMethod("absquatulate", (Class[]) null);
	}

	public void testDefaultMatchesAll() throws Exception {
		MethodMatcher defaultMm = MethodMatcher.TRUE;
		assertTrue(defaultMm.matches(EXCEPTION_GETMESSAGE, Exception.class));
		assertTrue(defaultMm.matches(ITESTBEAN_SETAGE, TestBean.class));
	}
	
	public void testMethodMatcherTrueSerializable() throws Exception {
		assertSame(SerializationTestUtils.serializeAndDeserialize(MethodMatcher.TRUE), MethodMatcher.TRUE);
	}

	public void testSingle() throws Exception {
		MethodMatcher defaultMm = MethodMatcher.TRUE;
		assertTrue(defaultMm.matches(EXCEPTION_GETMESSAGE, Exception.class));
		assertTrue(defaultMm.matches(ITESTBEAN_SETAGE, TestBean.class));
		defaultMm = MethodMatchers.intersection(defaultMm, new StartsWithMatcher("get"));

		assertTrue(defaultMm.matches(EXCEPTION_GETMESSAGE, Exception.class));
		assertFalse(defaultMm.matches(ITESTBEAN_SETAGE, TestBean.class));
	}

	
	public void testDynamicAndStaticMethodMatcherIntersection() throws Exception {
		MethodMatcher mm1 = MethodMatcher.TRUE;
		MethodMatcher mm2 = new TestDynamicMethodMatcherWhichMatches();
		MethodMatcher intersection = MethodMatchers.intersection(mm1, mm2);
		assertTrue("Intersection is a dynamic matcher", intersection.isRuntime());
		assertTrue("2Matched setAge method", intersection.matches(ITESTBEAN_SETAGE, TestBean.class));
		assertTrue("3Matched setAge method", intersection.matches(ITESTBEAN_SETAGE, TestBean.class, new Object[] { new Integer(5) }));
		// Knock out dynamic part
		intersection = MethodMatchers.intersection(intersection, new TestDynamicMethodMatcherWhichDoesNotMatch());
		assertTrue("Intersection is a dynamic matcher", intersection.isRuntime());
		assertTrue("2Matched setAge method", intersection.matches(ITESTBEAN_SETAGE, TestBean.class));
		assertFalse("3 - not Matched setAge method", intersection.matches(ITESTBEAN_SETAGE, TestBean.class, new Object[] { new Integer(5) }));
	}
	
	public void testStaticMethodMatcherUnion() throws Exception {
		MethodMatcher getterMatcher = new StartsWithMatcher("get");
		MethodMatcher setterMatcher = new StartsWithMatcher("set");
		MethodMatcher union = MethodMatchers.union(getterMatcher, setterMatcher);
		
		assertFalse("Union is a static matcher", union.isRuntime());
		assertTrue("Matched setAge method", union.matches(ITESTBEAN_SETAGE, TestBean.class));
		assertTrue("Matched getAge method", union.matches(ITESTBEAN_GETAGE, TestBean.class));
		assertFalse("Didn't matched absquatulate method", union.matches(IOTHER_ABSQUATULATE, TestBean.class));

	}


	public static class StartsWithMatcher extends StaticMethodMatcher {
		private String prefix;
		public StartsWithMatcher(String s) {
			this.prefix = s;
		}
		public boolean matches(Method m, Class targetClass) {
			return m.getName().startsWith(prefix);
		}
	}


	private static class TestDynamicMethodMatcherWhichMatches extends DynamicMethodMatcher {
		public boolean matches(Method m, Class targetClass, Object[] args) {
			return true;
		}
	}

	private static class TestDynamicMethodMatcherWhichDoesNotMatch extends DynamicMethodMatcher {
		public boolean matches(Method m, Class targetClass, Object[] args) {
			return false;
		}
	}

}