/*
 * Copyright 2002-2007 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.dao.annotation;

import junit.framework.TestCase;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;

import org.springframework.aop.Advisor;
import org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator;
import org.springframework.aop.framework.Advised;
import org.springframework.aop.support.AopUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisorTests.RepositoryInterface;
import org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisorTests.RepositoryInterfaceImpl;
import org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisorTests.StereotypedRepositoryInterfaceImpl;
import org.springframework.dao.support.ChainedPersistenceExceptionTranslator;
import org.springframework.stereotype.Repository;

/**
 * Unit tests for PersistenceExceptionTranslationPostProcessor. Does not test
 * translation; there are separate unit tests for the Spring AOP Advisor.
 * Just checks whether proxying occurs correctly, as a unit test should.
 *
 * @author Rod Johnson
 */
public class PersistenceExceptionTranslationPostProcessorTests extends TestCase {
	
	public void testFailsWithNoPersistenceExceptionTranslators() {
		GenericApplicationContext gac = new GenericApplicationContext();
		gac.registerBeanDefinition("translator",
				new RootBeanDefinition(PersistenceExceptionTranslationPostProcessor.class));
		gac.registerBeanDefinition("proxied", new RootBeanDefinition(StereotypedRepositoryInterfaceImpl.class));
		try {
			gac.refresh();
			fail("Should fail with no translators");
		}
		catch (BeansException ex) {
			// Ok
		}
	}
	
	public void testProxiesCorrectly() {
		GenericApplicationContext gac = new GenericApplicationContext();
		gac.registerBeanDefinition("translator",
				new RootBeanDefinition(PersistenceExceptionTranslationPostProcessor.class));
		gac.registerBeanDefinition("notProxied", new RootBeanDefinition(RepositoryInterfaceImpl.class));
		gac.registerBeanDefinition("proxied", new RootBeanDefinition(StereotypedRepositoryInterfaceImpl.class));
		gac.registerBeanDefinition("classProxied", new RootBeanDefinition(RepositoryWithoutInterface.class));
		gac.registerBeanDefinition("classProxiedAndAdvised",
				new RootBeanDefinition(RepositoryWithoutInterfaceAndOtherwiseAdvised.class));
		gac.registerBeanDefinition("chainedTranslator",
				new RootBeanDefinition(ChainedPersistenceExceptionTranslator.class));
		gac.registerBeanDefinition("proxyCreator",
				BeanDefinitionBuilder.rootBeanDefinition(AnnotationAwareAspectJAutoProxyCreator.class).
				addPropertyValue("order", 50).getBeanDefinition());
		gac.registerBeanDefinition("logger", new RootBeanDefinition(LogAllAspect.class));
		gac.refresh();

		RepositoryInterface shouldNotBeProxied = (RepositoryInterface) gac.getBean("notProxied");
		assertFalse(AopUtils.isAopProxy(shouldNotBeProxied));
		RepositoryInterface shouldBeProxied = (RepositoryInterface) gac.getBean("proxied");
		assertTrue(AopUtils.isAopProxy(shouldBeProxied));
		RepositoryWithoutInterface rwi = (RepositoryWithoutInterface) gac.getBean("classProxied");
		assertTrue(AopUtils.isAopProxy(rwi));
		checkWillTranslateExceptions(rwi);

		Additional rwi2 = (Additional) gac.getBean("classProxiedAndAdvised");
		assertTrue(AopUtils.isAopProxy(rwi2));
		rwi2.additionalMethod();
		checkWillTranslateExceptions(rwi2);
	}
	
	protected void checkWillTranslateExceptions(Object o) {
		assertTrue(o instanceof Advised);
		Advised a = (Advised) o;
		for (Advisor advisor : a.getAdvisors()) {
			if (advisor instanceof PersistenceExceptionTranslationAdvisor) {
				return;
			}
		}
		fail("No translation");
	}
	
	
	@Repository
	public static class RepositoryWithoutInterface {
		public void nameDoesntMatter() {			
		}
	}


	public interface Additional {

		void additionalMethod();
	}


	public static class RepositoryWithoutInterfaceAndOtherwiseAdvised extends StereotypedRepositoryInterfaceImpl
			implements Additional {

		public void additionalMethod() {
		}
	}


	@Aspect
	public static class LogAllAspect {
		//@Before("execution(* *())")
		@Before("execution(void *.additionalMethod())")
		public void log(JoinPoint jp) {
			System.out.println("Before " + jp.getSignature().getName());
		}
	}

}