AnnoheritedInterceptorTests.java

/**
 * Copyright (C) 2010 Daniel Manzke <daniel.manzke@googlemail.com>
 *
 * 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 de.devsurf.injection.guice.test.aop.annoherited;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.lang.reflect.Method;

import javax.interceptor.Interceptor;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.junit.Test;

import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.matcher.Matcher;
import com.google.inject.matcher.Matchers;

import de.devsurf.injection.guice.annotations.Bind;
import de.devsurf.injection.guice.aop.ClassMatcher;
import de.devsurf.injection.guice.aop.Intercept;
import de.devsurf.injection.guice.aop.MethodMatcher;
import de.devsurf.injection.guice.aop.feature.InterceptorFeature;
import de.devsurf.injection.guice.scanner.PackageFilter;
import de.devsurf.injection.guice.scanner.StartupModule;
import de.devsurf.injection.guice.scanner.asm.ASMClasspathScanner;

public class AnnoheritedInterceptorTests {
	private static ThreadLocal<Boolean> called = new ThreadLocal<Boolean>();

	@Test
	public void createDynamicModule() {
		StartupModule startup = StartupModule.create(ASMClasspathScanner.class,
			PackageFilter.create(AnnoheritedInterceptorTests.class));
		startup.addFeature(InterceptorFeature.class);

		Injector injector = Guice.createInjector(startup);
		assertNotNull(injector);
	}

	@Test
	public void createInheritedInterceptor() {
		called.set(false);
		StartupModule startup = StartupModule.create(ASMClasspathScanner.class,
			PackageFilter.create(AnnoheritedInterceptorTests.class));
		startup.addFeature(InterceptorFeature.class);

		Injector injector = Guice.createInjector(startup);
		assertNotNull(injector);

		TestInterface instance = injector.getInstance(TestInterface.class);
		instance.sayHello(); // should be intercepted
		instance.sayGoodBye(); // if intercepted an exception is thrown

		assertTrue("Interceptor was not invoked", called.get());
	}

	@Interceptor
	public static class InheritedMethodInterceptor implements MethodInterceptor {

		@Override
		public Object invoke(MethodInvocation invocation) throws Throwable {
			assertTrue(invocation.getMethod().getName().equals("sayHello"));
			called.set(true);
			return invocation.proceed();
		}

		@ClassMatcher
		public Matcher<? super Class<?>> getClassMatcher() {
			return Matchers.any();
		}

		@MethodMatcher
		public Matcher<? super Method> getMethodMatcher() {
			return Matchers.annotatedWith(Intercept.class);
		}

	}

	public static interface TestInterface {
		String sayHello();

		String sayGoodBye();
	}

	@Bind
	public static class TestInterfaceImplementation implements TestInterface {
		public static final String TEST = "test";

		@Override
		@Intercept
		public String sayHello() {
			return TEST;
		}

		@Override
		public String sayGoodBye() {
			return "Good Bye!";
		}
	}
}