/*
 * Copyright 2002-2018 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
 *
 *      https://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.beans.factory.annotation;

import java.io.Serializable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Provider;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import org.springframework.beans.factory.BeanCreationException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.AutowireCandidateQualifier;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.tests.sample.beans.ITestBean;
import org.springframework.tests.sample.beans.IndexedTestBean;
import org.springframework.tests.sample.beans.NestedTestBean;
import org.springframework.tests.sample.beans.TestBean;
import org.springframework.util.SerializationTestUtils;

import static org.junit.Assert.*;

/**
 * Unit tests for {@link org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor}
 * processing the JSR-330 {@link javax.inject.Inject} annotation.
 *
 * @author Juergen Hoeller
 * @since 3.0
 */
public class InjectAnnotationBeanPostProcessorTests {

	private DefaultListableBeanFactory bf;

	private AutowiredAnnotationBeanPostProcessor bpp;


	@Before
	public void setup() {
		bf = new DefaultListableBeanFactory();
		bf.registerResolvableDependency(BeanFactory.class, bf);
		bpp = new AutowiredAnnotationBeanPostProcessor();
		bpp.setBeanFactory(bf);
		bf.addBeanPostProcessor(bpp);
		bf.setAutowireCandidateResolver(new QualifierAnnotationAutowireCandidateResolver());
	}

	@After
	public void close() {
		bf.destroySingletons();
	}


	@Test
	public void testIncompleteBeanDefinition() {
		bf.registerBeanDefinition("testBean", new GenericBeanDefinition());
		try {
			bf.getBean("testBean");
		}
		catch (BeanCreationException ex) {
			assertTrue(ex.getRootCause() instanceof IllegalStateException);
		}
	}

	@Test
	public void testResourceInjection() {
		RootBeanDefinition bd = new RootBeanDefinition(ResourceInjectionBean.class);
		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", bd);
		TestBean tb = new TestBean();
		bf.registerSingleton("testBean", tb);

		ResourceInjectionBean bean = (ResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean());
		assertSame(tb, bean.getTestBean2());

		bean = (ResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean());
		assertSame(tb, bean.getTestBean2());
	}

	@Test
	public void testExtendedResourceInjection() {
		RootBeanDefinition bd = new RootBeanDefinition(TypedExtendedResourceInjectionBean.class);
		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", bd);
		TestBean tb = new TestBean();
		bf.registerSingleton("testBean", tb);
		NestedTestBean ntb = new NestedTestBean();
		bf.registerSingleton("nestedTestBean", ntb);

		TypedExtendedResourceInjectionBean bean = (TypedExtendedResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean());
		assertSame(tb, bean.getTestBean2());
		assertSame(tb, bean.getTestBean3());
		assertSame(tb, bean.getTestBean4());
		assertSame(ntb, bean.getNestedTestBean());
		assertSame(bf, bean.getBeanFactory());

		bean = (TypedExtendedResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean());
		assertSame(tb, bean.getTestBean2());
		assertSame(tb, bean.getTestBean3());
		assertSame(tb, bean.getTestBean4());
		assertSame(ntb, bean.getNestedTestBean());
		assertSame(bf, bean.getBeanFactory());
	}

	@Test
	public void testExtendedResourceInjectionWithOverriding() {
		RootBeanDefinition annotatedBd = new RootBeanDefinition(TypedExtendedResourceInjectionBean.class);
		TestBean tb2 = new TestBean();
		annotatedBd.getPropertyValues().add("testBean2", tb2);
		bf.registerBeanDefinition("annotatedBean", annotatedBd);
		TestBean tb = new TestBean();
		bf.registerSingleton("testBean", tb);
		NestedTestBean ntb = new NestedTestBean();
		bf.registerSingleton("nestedTestBean", ntb);

		TypedExtendedResourceInjectionBean bean = (TypedExtendedResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean());
		assertSame(tb2, bean.getTestBean2());
		assertSame(tb, bean.getTestBean3());
		assertSame(tb, bean.getTestBean4());
		assertSame(ntb, bean.getNestedTestBean());
		assertSame(bf, bean.getBeanFactory());
	}

	@Test
	public void testExtendedResourceInjectionWithAtRequired() {
		bf.addBeanPostProcessor(new RequiredAnnotationBeanPostProcessor());
		RootBeanDefinition bd = new RootBeanDefinition(TypedExtendedResourceInjectionBean.class);
		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", bd);
		TestBean tb = new TestBean();
		bf.registerSingleton("testBean", tb);
		NestedTestBean ntb = new NestedTestBean();
		bf.registerSingleton("nestedTestBean", ntb);

		TypedExtendedResourceInjectionBean bean = (TypedExtendedResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean());
		assertSame(tb, bean.getTestBean2());
		assertSame(tb, bean.getTestBean3());
		assertSame(tb, bean.getTestBean4());
		assertSame(ntb, bean.getNestedTestBean());
		assertSame(bf, bean.getBeanFactory());
	}

	@Test
	public void testConstructorResourceInjection() {
		RootBeanDefinition bd = new RootBeanDefinition(ConstructorResourceInjectionBean.class);
		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", bd);
		TestBean tb = new TestBean();
		bf.registerSingleton("testBean", tb);
		NestedTestBean ntb = new NestedTestBean();
		bf.registerSingleton("nestedTestBean", ntb);

		ConstructorResourceInjectionBean bean = (ConstructorResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean());
		assertSame(tb, bean.getTestBean2());
		assertSame(tb, bean.getTestBean3());
		assertSame(tb, bean.getTestBean4());
		assertSame(ntb, bean.getNestedTestBean());
		assertSame(bf, bean.getBeanFactory());

		bean = (ConstructorResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean());
		assertSame(tb, bean.getTestBean2());
		assertSame(tb, bean.getTestBean3());
		assertSame(tb, bean.getTestBean4());
		assertSame(ntb, bean.getNestedTestBean());
		assertSame(bf, bean.getBeanFactory());
	}

	@Test
	public void testConstructorResourceInjectionWithMultipleCandidatesAsCollection() {
		bf.registerBeanDefinition("annotatedBean",
				new RootBeanDefinition(ConstructorsCollectionResourceInjectionBean.class));
		TestBean tb = new TestBean();
		bf.registerSingleton("testBean", tb);
		NestedTestBean ntb1 = new NestedTestBean();
		bf.registerSingleton("nestedTestBean1", ntb1);
		NestedTestBean ntb2 = new NestedTestBean();
		bf.registerSingleton("nestedTestBean2", ntb2);

		ConstructorsCollectionResourceInjectionBean bean = (ConstructorsCollectionResourceInjectionBean) bf.getBean("annotatedBean");
		assertNull(bean.getTestBean3());
		assertSame(tb, bean.getTestBean4());
		assertEquals(2, bean.getNestedTestBeans().size());
		assertSame(ntb1, bean.getNestedTestBeans().get(0));
		assertSame(ntb2, bean.getNestedTestBeans().get(1));
	}

	@Test
	public void testConstructorResourceInjectionWithMultipleCandidatesAndFallback() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ConstructorsResourceInjectionBean.class));
		TestBean tb = new TestBean();
		bf.registerSingleton("testBean", tb);

		ConstructorsResourceInjectionBean bean = (ConstructorsResourceInjectionBean) bf.getBean("annotatedBean");
		assertSame(tb, bean.getTestBean3());
		assertNull(bean.getTestBean4());
	}

	@Test
	public void testConstructorInjectionWithMap() {
		RootBeanDefinition bd = new RootBeanDefinition(MapConstructorInjectionBean.class);
		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", bd);
		TestBean tb1 = new TestBean();
		TestBean tb2 = new TestBean();
		bf.registerSingleton("testBean1", tb1);
		bf.registerSingleton("testBean2", tb1);

		MapConstructorInjectionBean bean = (MapConstructorInjectionBean) bf.getBean("annotatedBean");
		assertEquals(2, bean.getTestBeanMap().size());
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean1"));
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean2"));
		assertTrue(bean.getTestBeanMap().values().contains(tb1));
		assertTrue(bean.getTestBeanMap().values().contains(tb2));

		bean = (MapConstructorInjectionBean) bf.getBean("annotatedBean");
		assertEquals(2, bean.getTestBeanMap().size());
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean1"));
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean2"));
		assertTrue(bean.getTestBeanMap().values().contains(tb1));
		assertTrue(bean.getTestBeanMap().values().contains(tb2));
	}

	@Test
	public void testFieldInjectionWithMap() {
		RootBeanDefinition bd = new RootBeanDefinition(MapFieldInjectionBean.class);
		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", bd);
		TestBean tb1 = new TestBean();
		TestBean tb2 = new TestBean();
		bf.registerSingleton("testBean1", tb1);
		bf.registerSingleton("testBean2", tb1);

		MapFieldInjectionBean bean = (MapFieldInjectionBean) bf.getBean("annotatedBean");
		assertEquals(2, bean.getTestBeanMap().size());
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean1"));
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean2"));
		assertTrue(bean.getTestBeanMap().values().contains(tb1));
		assertTrue(bean.getTestBeanMap().values().contains(tb2));

		bean = (MapFieldInjectionBean) bf.getBean("annotatedBean");
		assertEquals(2, bean.getTestBeanMap().size());
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean1"));
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean2"));
		assertTrue(bean.getTestBeanMap().values().contains(tb1));
		assertTrue(bean.getTestBeanMap().values().contains(tb2));
	}

	@Test
	public void testMethodInjectionWithMap() {
		RootBeanDefinition bd = new RootBeanDefinition(MapMethodInjectionBean.class);
		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", bd);
		TestBean tb = new TestBean();
		bf.registerSingleton("testBean", tb);

		MapMethodInjectionBean bean = (MapMethodInjectionBean) bf.getBean("annotatedBean");
		assertEquals(1, bean.getTestBeanMap().size());
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean"));
		assertTrue(bean.getTestBeanMap().values().contains(tb));
		assertSame(tb, bean.getTestBean());

		bean = (MapMethodInjectionBean) bf.getBean("annotatedBean");
		assertEquals(1, bean.getTestBeanMap().size());
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean"));
		assertTrue(bean.getTestBeanMap().values().contains(tb));
		assertSame(tb, bean.getTestBean());
	}

	@Test
	public void testMethodInjectionWithMapAndMultipleMatches() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(MapMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean1", new RootBeanDefinition(TestBean.class));
		bf.registerBeanDefinition("testBean2", new RootBeanDefinition(TestBean.class));

		try {
			bf.getBean("annotatedBean");
			fail("should have failed, more than one bean of type");
		}
		catch (BeanCreationException e) {
			// expected
		}
	}

	@Test
	public void testMethodInjectionWithMapAndMultipleMatchesButOnlyOneAutowireCandidate() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(MapMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean1", new RootBeanDefinition(TestBean.class));
		RootBeanDefinition rbd2 = new RootBeanDefinition(TestBean.class);
		rbd2.setAutowireCandidate(false);
		bf.registerBeanDefinition("testBean2", rbd2);

		MapMethodInjectionBean bean = (MapMethodInjectionBean) bf.getBean("annotatedBean");
		TestBean tb = (TestBean) bf.getBean("testBean1");
		assertEquals(1, bean.getTestBeanMap().size());
		assertTrue(bean.getTestBeanMap().keySet().contains("testBean1"));
		assertTrue(bean.getTestBeanMap().values().contains(tb));
		assertSame(tb, bean.getTestBean());
	}

	@Test
	public void testObjectFactoryInjection() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ObjectFactoryQualifierFieldInjectionBean.class));
		RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);
		bd.addQualifier(new AutowireCandidateQualifier(Qualifier.class, "testBean"));
		bf.registerBeanDefinition("testBean", bd);
		bf.registerBeanDefinition("testBean2", new RootBeanDefinition(TestBean.class));

		ObjectFactoryQualifierFieldInjectionBean bean = (ObjectFactoryQualifierFieldInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryQualifierInjection() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ObjectFactoryQualifierFieldInjectionBean.class));
		RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);
		bd.addQualifier(new AutowireCandidateQualifier(Qualifier.class, "testBean"));
		bf.registerBeanDefinition("testBean", bd);

		ObjectFactoryQualifierFieldInjectionBean bean = (ObjectFactoryQualifierFieldInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryFieldInjectionIntoPrototypeBean() {
		RootBeanDefinition annotatedBeanDefinition = new RootBeanDefinition(ObjectFactoryQualifierFieldInjectionBean.class);
		annotatedBeanDefinition.setScope(BeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", annotatedBeanDefinition);
		RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);
		bd.addQualifier(new AutowireCandidateQualifier(Qualifier.class, "testBean"));
		bf.registerBeanDefinition("testBean", bd);
		bf.registerBeanDefinition("testBean2", new RootBeanDefinition(TestBean.class));

		ObjectFactoryQualifierFieldInjectionBean bean = (ObjectFactoryQualifierFieldInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
		ObjectFactoryQualifierFieldInjectionBean anotherBean = (ObjectFactoryQualifierFieldInjectionBean) bf.getBean("annotatedBean");
		assertNotSame(anotherBean, bean);
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryMethodInjectionIntoPrototypeBean() {
		RootBeanDefinition annotatedBeanDefinition = new RootBeanDefinition(ObjectFactoryQualifierMethodInjectionBean.class);
		annotatedBeanDefinition.setScope(BeanDefinition.SCOPE_PROTOTYPE);
		bf.registerBeanDefinition("annotatedBean", annotatedBeanDefinition);
		RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);
		bd.addQualifier(new AutowireCandidateQualifier(Qualifier.class, "testBean"));
		bf.registerBeanDefinition("testBean", bd);
		bf.registerBeanDefinition("testBean2", new RootBeanDefinition(TestBean.class));

		ObjectFactoryQualifierMethodInjectionBean bean = (ObjectFactoryQualifierMethodInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
		ObjectFactoryQualifierMethodInjectionBean anotherBean = (ObjectFactoryQualifierMethodInjectionBean) bf.getBean("annotatedBean");
		assertNotSame(anotherBean, bean);
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryWithBeanField() throws Exception {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ObjectFactoryFieldInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));
		bf.setSerializationId("test");

		ObjectFactoryFieldInjectionBean bean = (ObjectFactoryFieldInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
		bean = (ObjectFactoryFieldInjectionBean) SerializationTestUtils.serializeAndDeserialize(bean);
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryWithBeanMethod() throws Exception {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ObjectFactoryMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));
		bf.setSerializationId("test");

		ObjectFactoryMethodInjectionBean bean = (ObjectFactoryMethodInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
		bean = (ObjectFactoryMethodInjectionBean) SerializationTestUtils.serializeAndDeserialize(bean);
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryWithTypedListField() throws Exception {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ObjectFactoryListFieldInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));
		bf.setSerializationId("test");

		ObjectFactoryListFieldInjectionBean bean = (ObjectFactoryListFieldInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
		bean = (ObjectFactoryListFieldInjectionBean) SerializationTestUtils.serializeAndDeserialize(bean);
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryWithTypedListMethod() throws Exception {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ObjectFactoryListMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));
		bf.setSerializationId("test");

		ObjectFactoryListMethodInjectionBean bean = (ObjectFactoryListMethodInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
		bean = (ObjectFactoryListMethodInjectionBean) SerializationTestUtils.serializeAndDeserialize(bean);
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryWithTypedMapField() throws Exception {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ObjectFactoryMapFieldInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));
		bf.setSerializationId("test");

		ObjectFactoryMapFieldInjectionBean bean = (ObjectFactoryMapFieldInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
		bean = (ObjectFactoryMapFieldInjectionBean) SerializationTestUtils.serializeAndDeserialize(bean);
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testObjectFactoryWithTypedMapMethod() throws Exception {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ObjectFactoryMapMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));
		bf.setSerializationId("test");

		ObjectFactoryMapMethodInjectionBean bean = (ObjectFactoryMapMethodInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
		bean = (ObjectFactoryMapMethodInjectionBean) SerializationTestUtils.serializeAndDeserialize(bean);
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	/**
	 * Verifies that a dependency on a {@link org.springframework.beans.factory.FactoryBean}
	 * can be autowired via {@link org.springframework.beans.factory.annotation.Autowired @Inject},
	 * specifically addressing SPR-4040.
	 */
	@Test
	public void testBeanAutowiredWithFactoryBean() {
		bf.registerBeanDefinition("factoryBeanDependentBean", new RootBeanDefinition(FactoryBeanDependentBean.class));
		bf.registerSingleton("stringFactoryBean", new StringFactoryBean());

		final StringFactoryBean factoryBean = (StringFactoryBean) bf.getBean("&stringFactoryBean");
		final FactoryBeanDependentBean bean = (FactoryBeanDependentBean) bf.getBean("factoryBeanDependentBean");

		assertNotNull("The singleton StringFactoryBean should have been registered.", factoryBean);
		assertNotNull("The factoryBeanDependentBean should have been registered.", bean);
		assertEquals("The FactoryBeanDependentBean should have been autowired 'by type' with the StringFactoryBean.",
				factoryBean, bean.getFactoryBean());
	}

	@Test
	public void testNullableFieldInjectionWithBeanAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(NullableFieldInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));

		NullableFieldInjectionBean bean = (NullableFieldInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testNullableFieldInjectionWithBeanNotAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(NullableFieldInjectionBean.class));

		NullableFieldInjectionBean bean = (NullableFieldInjectionBean) bf.getBean("annotatedBean");
		assertNull(bean.getTestBean());
	}

	@Test
	public void testNullableMethodInjectionWithBeanAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(NullableMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));

		NullableMethodInjectionBean bean = (NullableMethodInjectionBean) bf.getBean("annotatedBean");
		assertSame(bf.getBean("testBean"), bean.getTestBean());
	}

	@Test
	public void testNullableMethodInjectionWithBeanNotAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(NullableMethodInjectionBean.class));

		NullableMethodInjectionBean bean = (NullableMethodInjectionBean) bf.getBean("annotatedBean");
		assertNull(bean.getTestBean());
	}

	@Test
	public void testOptionalFieldInjectionWithBeanAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalFieldInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));

		OptionalFieldInjectionBean bean = (OptionalFieldInjectionBean) bf.getBean("annotatedBean");
		assertTrue(bean.getTestBean().isPresent());
		assertSame(bf.getBean("testBean"), bean.getTestBean().get());
	}

	@Test
	public void testOptionalFieldInjectionWithBeanNotAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalFieldInjectionBean.class));

		OptionalFieldInjectionBean bean = (OptionalFieldInjectionBean) bf.getBean("annotatedBean");
		assertFalse(bean.getTestBean().isPresent());
	}

	@Test
	public void testOptionalMethodInjectionWithBeanAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));

		OptionalMethodInjectionBean bean = (OptionalMethodInjectionBean) bf.getBean("annotatedBean");
		assertTrue(bean.getTestBean().isPresent());
		assertSame(bf.getBean("testBean"), bean.getTestBean().get());
	}

	@Test
	public void testOptionalMethodInjectionWithBeanNotAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalMethodInjectionBean.class));

		OptionalMethodInjectionBean bean = (OptionalMethodInjectionBean) bf.getBean("annotatedBean");
		assertFalse(bean.getTestBean().isPresent());
	}

	@Test
	public void testOptionalListFieldInjectionWithBeanAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalListFieldInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));

		OptionalListFieldInjectionBean bean = (OptionalListFieldInjectionBean) bf.getBean("annotatedBean");
		assertTrue(bean.getTestBean().isPresent());
		assertSame(bf.getBean("testBean"), bean.getTestBean().get().get(0));
	}

	@Test
	public void testOptionalListFieldInjectionWithBeanNotAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalListFieldInjectionBean.class));

		OptionalListFieldInjectionBean bean = (OptionalListFieldInjectionBean) bf.getBean("annotatedBean");
		assertFalse(bean.getTestBean().isPresent());
	}

	@Test
	public void testOptionalListMethodInjectionWithBeanAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalListMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));

		OptionalListMethodInjectionBean bean = (OptionalListMethodInjectionBean) bf.getBean("annotatedBean");
		assertTrue(bean.getTestBean().isPresent());
		assertSame(bf.getBean("testBean"), bean.getTestBean().get().get(0));
	}

	@Test
	public void testOptionalListMethodInjectionWithBeanNotAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(OptionalListMethodInjectionBean.class));

		OptionalListMethodInjectionBean bean = (OptionalListMethodInjectionBean) bf.getBean("annotatedBean");
		assertFalse(bean.getTestBean().isPresent());
	}

	@Test
	public void testProviderOfOptionalFieldInjectionWithBeanAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ProviderOfOptionalFieldInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));

		ProviderOfOptionalFieldInjectionBean bean = (ProviderOfOptionalFieldInjectionBean) bf.getBean("annotatedBean");
		assertTrue(bean.getTestBean().isPresent());
		assertSame(bf.getBean("testBean"), bean.getTestBean().get());
	}

	@Test
	public void testProviderOfOptionalFieldInjectionWithBeanNotAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ProviderOfOptionalFieldInjectionBean.class));

		ProviderOfOptionalFieldInjectionBean bean = (ProviderOfOptionalFieldInjectionBean) bf.getBean("annotatedBean");
		assertFalse(bean.getTestBean().isPresent());
	}

	@Test
	public void testProviderOfOptionalMethodInjectionWithBeanAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ProviderOfOptionalMethodInjectionBean.class));
		bf.registerBeanDefinition("testBean", new RootBeanDefinition(TestBean.class));

		ProviderOfOptionalMethodInjectionBean bean = (ProviderOfOptionalMethodInjectionBean) bf.getBean("annotatedBean");
		assertTrue(bean.getTestBean().isPresent());
		assertSame(bf.getBean("testBean"), bean.getTestBean().get());
	}

	@Test
	public void testProviderOfOptionalMethodInjectionWithBeanNotAvailable() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ProviderOfOptionalMethodInjectionBean.class));

		ProviderOfOptionalMethodInjectionBean bean = (ProviderOfOptionalMethodInjectionBean) bf.getBean("annotatedBean");
		assertFalse(bean.getTestBean().isPresent());
	}

	@Test
	public void testAnnotatedDefaultConstructor() {
		bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(AnnotatedDefaultConstructorBean.class));

		assertNotNull(bf.getBean("annotatedBean"));
	}


	public static class ResourceInjectionBean {

		@Inject
		private TestBean testBean;

		private TestBean testBean2;

		@Inject
		public void setTestBean2(TestBean testBean2) {
			if (this.testBean2 != null) {
				throw new IllegalStateException("Already called");
			}
			this.testBean2 = testBean2;
		}

		public TestBean getTestBean() {
			return this.testBean;
		}

		public TestBean getTestBean2() {
			return this.testBean2;
		}
	}


	public static class ExtendedResourceInjectionBean<T> extends ResourceInjectionBean {

		@Inject
		protected ITestBean testBean3;

		private T nestedTestBean;

		private ITestBean testBean4;

		private BeanFactory beanFactory;

		public ExtendedResourceInjectionBean() {
		}

		@Override
		@Inject @Required
		public void setTestBean2(TestBean testBean2) {
			super.setTestBean2(testBean2);
		}

		@Inject
		private void inject(ITestBean testBean4, T nestedTestBean) {
			this.testBean4 = testBean4;
			this.nestedTestBean = nestedTestBean;
		}

		@Inject
		protected void initBeanFactory(BeanFactory beanFactory) {
			this.beanFactory = beanFactory;
		}

		public ITestBean getTestBean3() {
			return this.testBean3;
		}

		public ITestBean getTestBean4() {
			return this.testBean4;
		}

		public T getNestedTestBean() {
			return this.nestedTestBean;
		}

		public BeanFactory getBeanFactory() {
			return this.beanFactory;
		}
	}


	public static class TypedExtendedResourceInjectionBean extends ExtendedResourceInjectionBean<NestedTestBean> {
	}


	public static class OptionalResourceInjectionBean extends ResourceInjectionBean {

		@Inject
		protected ITestBean testBean3;

		private IndexedTestBean indexedTestBean;

		private NestedTestBean[] nestedTestBeans;

		@Inject
		public NestedTestBean[] nestedTestBeansField;

		private ITestBean testBean4;

		@Override
		@Inject
		public void setTestBean2(TestBean testBean2) {
			super.setTestBean2(testBean2);
		}

		@Inject
		private void inject(ITestBean testBean4, NestedTestBean[] nestedTestBeans, IndexedTestBean indexedTestBean) {
			this.testBean4 = testBean4;
			this.indexedTestBean = indexedTestBean;
			this.nestedTestBeans = nestedTestBeans;
		}

		public ITestBean getTestBean3() {
			return this.testBean3;
		}

		public ITestBean getTestBean4() {
			return this.testBean4;
		}

		public IndexedTestBean getIndexedTestBean() {
			return this.indexedTestBean;
		}

		public NestedTestBean[] getNestedTestBeans() {
			return this.nestedTestBeans;
		}
	}


	public static class OptionalCollectionResourceInjectionBean extends ResourceInjectionBean {

		@Inject
		protected ITestBean testBean3;

		private IndexedTestBean indexedTestBean;

		private List<NestedTestBean> nestedTestBeans;

		public List<NestedTestBean> nestedTestBeansSetter;

		@Inject
		public List<NestedTestBean> nestedTestBeansField;

		private ITestBean testBean4;

		@Override
		@Inject
		public void setTestBean2(TestBean testBean2) {
			super.setTestBean2(testBean2);
		}

		@Inject
		private void inject(ITestBean testBean4, List<NestedTestBean> nestedTestBeans, IndexedTestBean indexedTestBean) {
			this.testBean4 = testBean4;
			this.indexedTestBean = indexedTestBean;
			this.nestedTestBeans = nestedTestBeans;
		}

		@Inject
		public void setNestedTestBeans(List<NestedTestBean> nestedTestBeans) {
			this.nestedTestBeansSetter = nestedTestBeans;
		}

		public ITestBean getTestBean3() {
			return this.testBean3;
		}

		public ITestBean getTestBean4() {
			return this.testBean4;
		}

		public IndexedTestBean getIndexedTestBean() {
			return this.indexedTestBean;
		}

		public List<NestedTestBean> getNestedTestBeans() {
			return this.nestedTestBeans;
		}
	}


	public static class ConstructorResourceInjectionBean extends ResourceInjectionBean {

		@Inject
		protected ITestBean testBean3;

		private ITestBean testBean4;

		private NestedTestBean nestedTestBean;

		private ConfigurableListableBeanFactory beanFactory;


		public ConstructorResourceInjectionBean() {
			throw new UnsupportedOperationException();
		}

		public ConstructorResourceInjectionBean(ITestBean testBean3) {
			throw new UnsupportedOperationException();
		}

		@Inject
		public ConstructorResourceInjectionBean(ITestBean testBean4, NestedTestBean nestedTestBean,
				ConfigurableListableBeanFactory beanFactory) {
			this.testBean4 = testBean4;
			this.nestedTestBean = nestedTestBean;
			this.beanFactory = beanFactory;
		}

		public ConstructorResourceInjectionBean(NestedTestBean nestedTestBean) {
			throw new UnsupportedOperationException();
		}

		public ConstructorResourceInjectionBean(ITestBean testBean3, ITestBean testBean4, NestedTestBean nestedTestBean) {
			throw new UnsupportedOperationException();
		}

		@Override
		@Inject
		public void setTestBean2(TestBean testBean2) {
			super.setTestBean2(testBean2);
		}

		public ITestBean getTestBean3() {
			return this.testBean3;
		}

		public ITestBean getTestBean4() {
			return this.testBean4;
		}

		public NestedTestBean getNestedTestBean() {
			return this.nestedTestBean;
		}

		public ConfigurableListableBeanFactory getBeanFactory() {
			return this.beanFactory;
		}
	}


	public static class ConstructorsResourceInjectionBean {

		protected ITestBean testBean3;

		private ITestBean testBean4;

		private NestedTestBean[] nestedTestBeans;

		public ConstructorsResourceInjectionBean() {
		}

		@Inject
		public ConstructorsResourceInjectionBean(ITestBean testBean3) {
			this.testBean3 = testBean3;
		}

		public ConstructorsResourceInjectionBean(ITestBean testBean4, NestedTestBean[] nestedTestBeans) {
			this.testBean4 = testBean4;
			this.nestedTestBeans = nestedTestBeans;
		}

		public ConstructorsResourceInjectionBean(NestedTestBean nestedTestBean) {
			throw new UnsupportedOperationException();
		}

		public ConstructorsResourceInjectionBean(ITestBean testBean3, ITestBean testBean4, NestedTestBean nestedTestBean) {
			throw new UnsupportedOperationException();
		}

		public ITestBean getTestBean3() {
			return this.testBean3;
		}

		public ITestBean getTestBean4() {
			return this.testBean4;
		}

		public NestedTestBean[] getNestedTestBeans() {
			return this.nestedTestBeans;
		}
	}


	public static class ConstructorsCollectionResourceInjectionBean {

		protected ITestBean testBean3;

		private ITestBean testBean4;

		private List<NestedTestBean> nestedTestBeans;

		public ConstructorsCollectionResourceInjectionBean() {
		}

		public ConstructorsCollectionResourceInjectionBean(ITestBean testBean3) {
			this.testBean3 = testBean3;
		}

		@Inject
		public ConstructorsCollectionResourceInjectionBean(ITestBean testBean4, List<NestedTestBean> nestedTestBeans) {
			this.testBean4 = testBean4;
			this.nestedTestBeans = nestedTestBeans;
		}

		public ConstructorsCollectionResourceInjectionBean(NestedTestBean nestedTestBean) {
			throw new UnsupportedOperationException();
		}

		public ConstructorsCollectionResourceInjectionBean(ITestBean testBean3, ITestBean testBean4,
				NestedTestBean nestedTestBean) {
			throw new UnsupportedOperationException();
		}

		public ITestBean getTestBean3() {
			return this.testBean3;
		}

		public ITestBean getTestBean4() {
			return this.testBean4;
		}

		public List<NestedTestBean> getNestedTestBeans() {
			return this.nestedTestBeans;
		}
	}


	public static class MapConstructorInjectionBean {

		private Map<String, TestBean> testBeanMap;

		@Inject
		public MapConstructorInjectionBean(Map<String, TestBean> testBeanMap) {
			this.testBeanMap = testBeanMap;
		}

		public Map<String, TestBean> getTestBeanMap() {
			return this.testBeanMap;
		}
	}


	public static class MapFieldInjectionBean {

		@Inject
		private Map<String, TestBean> testBeanMap;

		public Map<String, TestBean> getTestBeanMap() {
			return this.testBeanMap;
		}
	}


	public static class MapMethodInjectionBean {

		private TestBean testBean;

		private Map<String, TestBean> testBeanMap;

		@Inject
		public void setTestBeanMap(TestBean testBean, Map<String, TestBean> testBeanMap) {
			this.testBean = testBean;
			this.testBeanMap = testBeanMap;
		}

		public TestBean getTestBean() {
			return this.testBean;
		}

		public Map<String, TestBean> getTestBeanMap() {
			return this.testBeanMap;
		}
	}


	@SuppressWarnings("serial")
	public static class ObjectFactoryFieldInjectionBean implements Serializable {

		@Inject
		private Provider<TestBean> testBeanFactory;

		public TestBean getTestBean() {
			return this.testBeanFactory.get();
		}
	}


	@SuppressWarnings("serial")
	public static class ObjectFactoryMethodInjectionBean implements Serializable {

		private Provider<TestBean> testBeanFactory;

		@Inject
		public void setTestBeanFactory(Provider<TestBean> testBeanFactory) {
			this.testBeanFactory = testBeanFactory;
		}

		public TestBean getTestBean() {
			return this.testBeanFactory.get();
		}
	}


	public static class ObjectFactoryQualifierFieldInjectionBean {

		@Inject
		@Named("testBean")
		private Provider<?> testBeanFactory;

		public TestBean getTestBean() {
			return (TestBean) this.testBeanFactory.get();
		}
	}


	public static class ObjectFactoryQualifierMethodInjectionBean {

		private Provider<?> testBeanFactory;

		@Inject
		@Named("testBean")
		public void setTestBeanFactory(Provider<?> testBeanFactory) {
			this.testBeanFactory = testBeanFactory;
		}

		public TestBean getTestBean() {
			return (TestBean) this.testBeanFactory.get();
		}
	}


	@SuppressWarnings("serial")
	public static class ObjectFactoryListFieldInjectionBean implements Serializable {

		@Inject
		private Provider<List<TestBean>> testBeanFactory;

		public void setTestBeanFactory(Provider<List<TestBean>> testBeanFactory) {
			this.testBeanFactory = testBeanFactory;
		}

		public TestBean getTestBean() {
			return this.testBeanFactory.get().get(0);
		}
	}


	@SuppressWarnings("serial")
	public static class ObjectFactoryListMethodInjectionBean implements Serializable {

		private Provider<List<TestBean>> testBeanFactory;

		@Inject
		public void setTestBeanFactory(Provider<List<TestBean>> testBeanFactory) {
			this.testBeanFactory = testBeanFactory;
		}

		public TestBean getTestBean() {
			return this.testBeanFactory.get().get(0);
		}
	}


	@SuppressWarnings("serial")
	public static class ObjectFactoryMapFieldInjectionBean implements Serializable {

		@Inject
		private Provider<Map<String, TestBean>> testBeanFactory;

		public void setTestBeanFactory(Provider<Map<String, TestBean>> testBeanFactory) {
			this.testBeanFactory = testBeanFactory;
		}

		public TestBean getTestBean() {
			return this.testBeanFactory.get().values().iterator().next();
		}
	}


	@SuppressWarnings("serial")
	public static class ObjectFactoryMapMethodInjectionBean implements Serializable {

		private Provider<Map<String, TestBean>> testBeanFactory;

		@Inject
		public void setTestBeanFactory(Provider<Map<String, TestBean>> testBeanFactory) {
			this.testBeanFactory = testBeanFactory;
		}

		public TestBean getTestBean() {
			return this.testBeanFactory.get().values().iterator().next();
		}
	}


	/**
	 * Bean with a dependency on a {@link org.springframework.beans.factory.FactoryBean}.
	 */
	private static class FactoryBeanDependentBean {

		@Inject
		private FactoryBean<?> factoryBean;

		public final FactoryBean<?> getFactoryBean() {
			return this.factoryBean;
		}
	}


	public static class StringFactoryBean implements FactoryBean<String> {

		@Override
		public String getObject() {
			return "";
		}

		@Override
		public Class<String> getObjectType() {
			return String.class;
		}

		@Override
		public boolean isSingleton() {
			return true;
		}
	}


	@Retention(RetentionPolicy.RUNTIME)
	public @interface Nullable {}


	public static class NullableFieldInjectionBean {

		@Inject @Nullable
		private TestBean testBean;

		public TestBean getTestBean() {
			return this.testBean;
		}
	}


	public static class NullableMethodInjectionBean {

		private TestBean testBean;

		@Inject
		public void setTestBean(@Nullable TestBean testBean) {
			this.testBean = testBean;
		}

		public TestBean getTestBean() {
			return this.testBean;
		}
	}


	public static class OptionalFieldInjectionBean {

		@Inject
		private Optional<TestBean> testBean;

		public Optional<TestBean> getTestBean() {
			return this.testBean;
		}
	}


	public static class OptionalMethodInjectionBean {

		private Optional<TestBean> testBean;

		@Inject
		public void setTestBean(Optional<TestBean> testBean) {
			this.testBean = testBean;
		}

		public Optional<TestBean> getTestBean() {
			return this.testBean;
		}
	}


	public static class OptionalListFieldInjectionBean {

		@Inject
		private Optional<List<TestBean>> testBean;

		public Optional<List<TestBean>> getTestBean() {
			return this.testBean;
		}
	}


	public static class OptionalListMethodInjectionBean {

		private Optional<List<TestBean>> testBean;

		@Inject
		public void setTestBean(Optional<List<TestBean>> testBean) {
			this.testBean = testBean;
		}

		public Optional<List<TestBean>> getTestBean() {
			return this.testBean;
		}
	}


	public static class ProviderOfOptionalFieldInjectionBean {

		@Inject
		private Provider<Optional<TestBean>> testBean;

		public Optional<TestBean> getTestBean() {
			return this.testBean.get();
		}
	}


	public static class ProviderOfOptionalMethodInjectionBean {

		private Provider<Optional<TestBean>> testBean;

		@Inject
		public void setTestBean(Provider<Optional<TestBean>> testBean) {
			this.testBean = testBean;
		}

		public Optional<TestBean> getTestBean() {
			return this.testBean.get();
		}
	}


	public static class AnnotatedDefaultConstructorBean {

		@Inject
		public AnnotatedDefaultConstructorBean() {
		}
	}

}
