Spring Framework example source code file (ControlFlowPointcutTests.java)

This example Spring Framework source code file (ControlFlowPointcutTests.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

controlflowpointcut, controlflowpointcuttests, defaultpointcutadvisor, itestbean, itestbean, nopinterceptor, nopinterceptor, one, pointcut, proxyfactory, proxyfactory, testbean, testbean, testcase

The Spring Framework ControlFlowPointcutTests.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 junit.framework.TestCase;

import org.springframework.aop.Pointcut;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.interceptor.NopInterceptor;
import org.springframework.beans.ITestBean;
import org.springframework.beans.TestBean;

/**
 * 
 * @author Rod Johnson
 */
public class ControlFlowPointcutTests extends TestCase {
	
	public ControlFlowPointcutTests(String s) {
		super(s);
	}
	
	public void testMatches() {
		TestBean target = new TestBean();
		target.setAge(27);
		NopInterceptor nop = new NopInterceptor();
		ControlFlowPointcut cflow = new ControlFlowPointcut(One.class, "getAge");
		ProxyFactory pf = new ProxyFactory(target);
		ITestBean proxied = (ITestBean) pf.getProxy();
		pf.addAdvisor(new DefaultPointcutAdvisor(cflow, nop));
		
		// Not advised, not under One
		assertEquals(target.getAge(), proxied.getAge());
		assertEquals(0, nop.getCount());
		
		// Will be advised
		assertEquals(target.getAge(), new One().getAge(proxied));
		assertEquals(1, nop.getCount());
		
		// Won't be advised
		assertEquals(target.getAge(), new One().nomatch(proxied));
		assertEquals(1, nop.getCount());
		assertEquals(3, cflow.getEvaluations());
	}
	
	/**
	 * Check that we can use a cflow pointcut only in conjunction with
	 * a static pointcut: e.g. all setter methods that are invoked under
	 * a particular class. This greatly reduces the number of calls
	 * to the cflow pointcut, meaning that it's not so prohibitively
	 * expensive.
	 */
	public void testSelectiveApplication() {
		TestBean target = new TestBean();
		target.setAge(27);
		NopInterceptor nop = new NopInterceptor();
		ControlFlowPointcut cflow = new ControlFlowPointcut(One.class);
		Pointcut settersUnderOne = Pointcuts.intersection(Pointcuts.SETTERS, cflow);
		ProxyFactory pf = new ProxyFactory(target);
		ITestBean proxied = (ITestBean) pf.getProxy();
		pf.addAdvisor(new DefaultPointcutAdvisor(settersUnderOne, nop));
	
		// Not advised, not under One
		target.setAge(16);
		assertEquals(0, nop.getCount());
	
		// Not advised; under One but not a setter
		assertEquals(16, new One().getAge(proxied));
		assertEquals(0, nop.getCount());
	
		// Won't be advised
		new One().set(proxied);
		assertEquals(1, nop.getCount());
		
		// We saved most evaluations
		assertEquals(1, cflow.getEvaluations());
	}

	public void testEqualsAndHashCode() throws Exception {
		assertEquals(new ControlFlowPointcut(One.class), new ControlFlowPointcut(One.class));
		assertEquals(new ControlFlowPointcut(One.class, "getAge"), new ControlFlowPointcut(One.class, "getAge"));
		assertFalse(new ControlFlowPointcut(One.class, "getAge").equals(new ControlFlowPointcut(One.class)));
		assertEquals(new ControlFlowPointcut(One.class).hashCode(), new ControlFlowPointcut(One.class).hashCode());
		assertEquals(new ControlFlowPointcut(One.class, "getAge").hashCode(), new ControlFlowPointcut(One.class, "getAge").hashCode());
		assertFalse(new ControlFlowPointcut(One.class, "getAge").hashCode() == new ControlFlowPointcut(One.class).hashCode());
	}
	
	public class One {
		int getAge(ITestBean proxied) {
			return proxied.getAge();
		}
		int nomatch(ITestBean proxied) {
			return proxied.getAge();
		}
		void set(ITestBean proxied) {
			proxied.setAge(5);
		}
	}

}