org.springframework.beans.factory.BeanFactory#getType ( )源码实例Demo

/**
 * Create an instance from a bean name, a method, and a {@code BeanFactory}.
 * The method {@link #createWithResolvedBean()} may be used later to
 * re-create the {@code HandlerMethod} with an initialized bean.
 */
public HandlerMethod(String beanName, BeanFactory beanFactory, Method method) {
	Assert.hasText(beanName, "Bean name is required");
	Assert.notNull(beanFactory, "BeanFactory is required");
	Assert.notNull(method, "Method is required");
	this.bean = beanName;
	this.beanFactory = beanFactory;
	Class<?> beanType = beanFactory.getType(beanName);
	if (beanType == null) {
		throw new IllegalStateException("Cannot resolve bean type for bean with name '" + beanName + "'");
	}
	this.beanType = ClassUtils.getUserClass(beanType);
	this.method = method;
	this.bridgedMethod = BridgeMethodResolver.findBridgedMethod(method);
	this.parameters = initMethodParameters();
}
 

@Override
public void setBeanFactory(BeanFactory beanFactory) {
	if (!StringUtils.hasText(this.targetBeanName)) {
		throw new IllegalArgumentException("Property 'targetBeanName' is required");
	}
	if (!StringUtils.hasText(this.methodName)) {
		throw new IllegalArgumentException("Property 'methodName' is required");
	}

	Class<?> beanClass = beanFactory.getType(this.targetBeanName);
	if (beanClass == null) {
		throw new IllegalArgumentException("Can't determine type of bean with name '" + this.targetBeanName + "'");
	}
	this.method = BeanUtils.resolveSignature(this.methodName, beanClass);

	if (this.method == null) {
		throw new IllegalArgumentException("Unable to locate method [" + this.methodName +
				"] on bean [" + this.targetBeanName + "]");
	}
}
 

/**
 * Create an instance from a bean name, a method, and a {@code BeanFactory}.
 * The method {@link #createWithResolvedBean()} may be used later to
 * re-create the {@code HandlerMethod} with an initialized bean.
 */
public HandlerMethod(String beanName, BeanFactory beanFactory, Method method) {
	Assert.hasText(beanName, "Bean name is required");
	Assert.notNull(beanFactory, "BeanFactory is required");
	Assert.notNull(method, "Method is required");
	this.bean = beanName;
	this.beanFactory = beanFactory;
	Class<?> beanType = beanFactory.getType(beanName);
	if (beanType == null) {
		throw new IllegalStateException("Cannot resolve bean type for bean with name '" + beanName + "'");
	}
	this.beanType = ClassUtils.getUserClass(beanType);
	this.method = method;
	this.bridgedMethod = BridgeMethodResolver.findBridgedMethod(method);
	this.parameters = initMethodParameters();
	evaluateResponseStatus();
	this.description = initDescription(this.beanType, this.method);
}
 

/**
 * Create an instance from a bean name, a method, and a {@code BeanFactory}.
 * The method {@link #createWithResolvedBean()} may be used later to
 * re-create the {@code HandlerMethod} with an initialized bean.
 */
public HandlerMethod(String beanName, BeanFactory beanFactory, Method method) {
	Assert.hasText(beanName, "Bean name is required");
	Assert.notNull(beanFactory, "BeanFactory is required");
	Assert.notNull(method, "Method is required");
	this.bean = beanName;
	this.beanFactory = beanFactory;
	Class<?> beanType = beanFactory.getType(beanName);
	if (beanType == null) {
		throw new IllegalStateException("Cannot resolve bean type for bean with name '" + beanName + "'");
	}
	this.beanType = ClassUtils.getUserClass(beanType);
	this.method = method;
	this.bridgedMethod = BridgeMethodResolver.findBridgedMethod(method);
	this.parameters = initMethodParameters();
}
 

@Override
public void setBeanFactory(BeanFactory beanFactory) {
	if (!StringUtils.hasText(this.targetBeanName)) {
		throw new IllegalArgumentException("Property 'targetBeanName' is required");
	}
	if (!StringUtils.hasText(this.methodName)) {
		throw new IllegalArgumentException("Property 'methodName' is required");
	}

	Class<?> beanClass = beanFactory.getType(this.targetBeanName);
	if (beanClass == null) {
		throw new IllegalArgumentException("Can't determine type of bean with name '" + this.targetBeanName + "'");
	}
	this.method = BeanUtils.resolveSignature(this.methodName, beanClass);

	if (this.method == null) {
		throw new IllegalArgumentException("Unable to locate method [" + this.methodName +
				"] on bean [" + this.targetBeanName + "]");
	}
}
 

@Override
public void setBeanFactory(BeanFactory beanFactory) {
	if (!StringUtils.hasText(this.targetBeanName)) {
		throw new IllegalArgumentException("Property 'targetBeanName' is required");
	}
	if (!StringUtils.hasText(this.methodName)) {
		throw new IllegalArgumentException("Property 'methodName' is required");
	}

	Class<?> beanClass = beanFactory.getType(this.targetBeanName);
	if (beanClass == null) {
		throw new IllegalArgumentException("Can't determine type of bean with name '" + this.targetBeanName + "'");
	}
	this.method = BeanUtils.resolveSignature(this.methodName, beanClass);

	if (this.method == null) {
		throw new IllegalArgumentException("Unable to locate method [" + this.methodName +
				"] on bean [" + this.targetBeanName + "]");
	}
}
 

@Override
public void setBeanFactory(BeanFactory beanFactory) {
	if (!StringUtils.hasText(this.targetBeanName)) {
		throw new IllegalArgumentException("Property 'targetBeanName' is required");
	}
	if (!StringUtils.hasText(this.methodName)) {
		throw new IllegalArgumentException("Property 'methodName' is required");
	}

	Class<?> beanClass = beanFactory.getType(this.targetBeanName);
	if (beanClass == null) {
		throw new IllegalArgumentException("Can't determine type of bean with name '" + this.targetBeanName + "'");
	}
	this.method = BeanUtils.resolveSignature(this.methodName, beanClass);

	if (this.method == null) {
		throw new IllegalArgumentException("Unable to locate method [" + this.methodName +
				"] on bean [" + this.targetBeanName + "]");
	}
}
 

/**
 * Create a BeanFactoryAspectInstanceFactory, providing a type that AspectJ should
 * introspect to create AJType metadata. Use if the BeanFactory may consider the type
 * to be a subclass (as when using CGLIB), and the information should relate to a superclass.
 * @param beanFactory the BeanFactory to obtain instance(s) from
 * @param name the name of the bean
 * @param type the type that should be introspected by AspectJ
 * ({@code null} indicates resolution through {@link BeanFactory#getType} via the bean name)
 */
public BeanFactoryAspectInstanceFactory(BeanFactory beanFactory, String name, @Nullable Class<?> type) {
	Assert.notNull(beanFactory, "BeanFactory must not be null");
	Assert.notNull(name, "Bean name must not be null");
	this.beanFactory = beanFactory;
	this.name = name;
	Class<?> resolvedType = type;
	if (type == null) {
		resolvedType = beanFactory.getType(name);
		Assert.notNull(resolvedType, "Unresolvable bean type - explicitly specify the aspect class");
	}
	this.aspectMetadata = new AspectMetadata(resolvedType, name);
}
 

@Override
public void setBeanFactory(BeanFactory beanFactory) {
	if (!(beanFactory instanceof ConfigurableBeanFactory)) {
		throw new IllegalStateException("Not running in a ConfigurableBeanFactory: " + beanFactory);
	}
	ConfigurableBeanFactory cbf = (ConfigurableBeanFactory) beanFactory;

	this.scopedTargetSource.setBeanFactory(beanFactory);

	ProxyFactory pf = new ProxyFactory();
	pf.copyFrom(this);
	pf.setTargetSource(this.scopedTargetSource);

	Assert.notNull(this.targetBeanName, "Property 'targetBeanName' is required");
	Class<?> beanType = beanFactory.getType(this.targetBeanName);
	if (beanType == null) {
		throw new IllegalStateException("Cannot create scoped proxy for bean '" + this.targetBeanName +
				"': Target type could not be determined at the time of proxy creation.");
	}
	if (!isProxyTargetClass() || beanType.isInterface() || Modifier.isPrivate(beanType.getModifiers())) {
		pf.setInterfaces(ClassUtils.getAllInterfacesForClass(beanType, cbf.getBeanClassLoader()));
	}

	// Add an introduction that implements only the methods on ScopedObject.
	ScopedObject scopedObject = new DefaultScopedObject(cbf, this.scopedTargetSource.getTargetBeanName());
	pf.addAdvice(new DelegatingIntroductionInterceptor(scopedObject));

	// Add the AopInfrastructureBean marker to indicate that the scoped proxy
	// itself is not subject to auto-proxying! Only its target bean is.
	pf.addInterface(AopInfrastructureBean.class);

	this.proxy = pf.getProxy(cbf.getBeanClassLoader());
}
 

/**
 * Create a BeanFactoryAspectInstanceFactory, providing a type that AspectJ should
 * introspect to create AJType metadata. Use if the BeanFactory may consider the type
 * to be a subclass (as when using CGLIB), and the information should relate to a superclass.
 * @param beanFactory the BeanFactory to obtain instance(s) from
 * @param name the name of the bean
 * @param type the type that should be introspected by AspectJ
 * ({@code null} indicates resolution through {@link BeanFactory#getType} via the bean name)
 */
public BeanFactoryAspectInstanceFactory(BeanFactory beanFactory, String name, @Nullable Class<?> type) {
	Assert.notNull(beanFactory, "BeanFactory must not be null");
	Assert.notNull(name, "Bean name must not be null");
	this.beanFactory = beanFactory;
	this.name = name;
	Class<?> resolvedType = type;
	if (type == null) {
		resolvedType = beanFactory.getType(name);
		Assert.notNull(resolvedType, "Unresolvable bean type - explicitly specify the aspect class");
	}
	this.aspectMetadata = new AspectMetadata(resolvedType, name);
}
 

@Override
public void setBeanFactory(BeanFactory beanFactory) {
	if (!(beanFactory instanceof ConfigurableBeanFactory)) {
		throw new IllegalStateException("Not running in a ConfigurableBeanFactory: " + beanFactory);
	}
	ConfigurableBeanFactory cbf = (ConfigurableBeanFactory) beanFactory;

	this.scopedTargetSource.setBeanFactory(beanFactory);

	ProxyFactory pf = new ProxyFactory();
	pf.copyFrom(this);
	pf.setTargetSource(this.scopedTargetSource);

	Class<?> beanType = beanFactory.getType(this.targetBeanName);
	if (beanType == null) {
		throw new IllegalStateException("Cannot create scoped proxy for bean '" + this.targetBeanName +
				"': Target type could not be determined at the time of proxy creation.");
	}
	if (!isProxyTargetClass() || beanType.isInterface() || Modifier.isPrivate(beanType.getModifiers())) {
		pf.setInterfaces(ClassUtils.getAllInterfacesForClass(beanType, cbf.getBeanClassLoader()));
	}

	// Add an introduction that implements only the methods on ScopedObject.
	ScopedObject scopedObject = new DefaultScopedObject(cbf, this.scopedTargetSource.getTargetBeanName());
	pf.addAdvice(new DelegatingIntroductionInterceptor(scopedObject));

	// Add the AopInfrastructureBean marker to indicate that the scoped proxy
	// itself is not subject to auto-proxying! Only its target bean is.
	pf.addInterface(AopInfrastructureBean.class);

	this.proxy = pf.getProxy(cbf.getBeanClassLoader());
}
 

@Override
public Class<?> getType(String name) throws NoSuchBeanDefinitionException {
	for (BeanFactory f : factories) {
		try {
			Class<?> c = f.getType(name);
			if (c != null) {
				return c;
			}	
		} catch (BeansException e) {
			LOG.info("bean exception", e);
		}
	}
	return null;
}
 

@Override
public void setBeanFactory(BeanFactory beanFactory) {
	if (!(beanFactory instanceof ConfigurableBeanFactory)) {
		throw new IllegalStateException("Not running in a ConfigurableBeanFactory: " + beanFactory);
	}
	ConfigurableBeanFactory cbf = (ConfigurableBeanFactory) beanFactory;

	this.scopedTargetSource.setBeanFactory(beanFactory);

	ProxyFactory pf = new ProxyFactory();
	pf.copyFrom(this);
	pf.setTargetSource(this.scopedTargetSource);

	Class<?> beanType = beanFactory.getType(this.targetBeanName);
	if (beanType == null) {
		throw new IllegalStateException("Cannot create scoped proxy for bean '" + this.targetBeanName +
				"': Target type could not be determined at the time of proxy creation.");
	}
	if (!isProxyTargetClass() || beanType.isInterface() || Modifier.isPrivate(beanType.getModifiers())) {
		pf.setInterfaces(ClassUtils.getAllInterfacesForClass(beanType, cbf.getBeanClassLoader()));
	}

	// Add an introduction that implements only the methods on ScopedObject.
	ScopedObject scopedObject = new DefaultScopedObject(cbf, this.scopedTargetSource.getTargetBeanName());
	pf.addAdvice(new DelegatingIntroductionInterceptor(scopedObject));

	// Add the AopInfrastructureBean marker to indicate that the scoped proxy
	// itself is not subject to auto-proxying! Only its target bean is.
	pf.addInterface(AopInfrastructureBean.class);

	this.proxy = pf.getProxy(cbf.getBeanClassLoader());
}
 

@Override
public Class<?> getType(ELContext elContext, Object base, Object property) throws ELException {
	if (base == null) {
		String beanName = property.toString();
		BeanFactory bf = getBeanFactory(elContext);
		if (bf.containsBean(beanName)) {
			elContext.setPropertyResolved(true);
			return bf.getType(beanName);
		}
	}
	return null;
}
 

private boolean matchesBeanType(Class<?> targetType, String beanName, BeanFactory beanFactory) {
	Class<?> beanType = beanFactory.getType(beanName);
	return (beanType != null && targetType.isAssignableFrom(beanType));
}
 

@Override
@Nullable
public Class<?> getType(String name) throws NoSuchBeanDefinitionException {
	String beanName = transformedBeanName(name);

	// Check manually registered singletons.
	Object beanInstance = getSingleton(beanName, false);
	if (beanInstance != null && beanInstance.getClass() != NullBean.class) {
		if (beanInstance instanceof FactoryBean && !BeanFactoryUtils.isFactoryDereference(name)) {
			return getTypeForFactoryBean((FactoryBean<?>) beanInstance);
		}
		else {
			return beanInstance.getClass();
		}
	}

	// No singleton instance found -> check bean definition.
	BeanFactory parentBeanFactory = getParentBeanFactory();
	if (parentBeanFactory != null && !containsBeanDefinition(beanName)) {
		// No bean definition found in this factory -> delegate to parent.
		return parentBeanFactory.getType(originalBeanName(name));
	}

	RootBeanDefinition mbd = getMergedLocalBeanDefinition(beanName);

	// Check decorated bean definition, if any: We assume it'll be easier
	// to determine the decorated bean's type than the proxy's type.
	BeanDefinitionHolder dbd = mbd.getDecoratedDefinition();
	if (dbd != null && !BeanFactoryUtils.isFactoryDereference(name)) {
		RootBeanDefinition tbd = getMergedBeanDefinition(dbd.getBeanName(), dbd.getBeanDefinition(), mbd);
		Class<?> targetClass = predictBeanType(dbd.getBeanName(), tbd);
		if (targetClass != null && !FactoryBean.class.isAssignableFrom(targetClass)) {
			return targetClass;
		}
	}

	Class<?> beanClass = predictBeanType(beanName, mbd);

	// Check bean class whether we're dealing with a FactoryBean.
	if (beanClass != null && FactoryBean.class.isAssignableFrom(beanClass)) {
		if (!BeanFactoryUtils.isFactoryDereference(name)) {
			// If it's a FactoryBean, we want to look at what it creates, not at the factory class.
			return getTypeForFactoryBean(beanName, mbd);
		}
		else {
			return beanClass;
		}
	}
	else {
		return (!BeanFactoryUtils.isFactoryDereference(name) ? beanClass : null);
	}
}
 

@Override
@Nullable
public Class<?> getType(String name) throws NoSuchBeanDefinitionException {
	String beanName = transformedBeanName(name);

	// Check manually registered singletons.
	Object beanInstance = getSingleton(beanName, false);
	if (beanInstance != null && beanInstance.getClass() != NullBean.class) {
		if (beanInstance instanceof FactoryBean && !BeanFactoryUtils.isFactoryDereference(name)) {
			return getTypeForFactoryBean((FactoryBean<?>) beanInstance);
		}
		else {
			return beanInstance.getClass();
		}
	}

	// No singleton instance found -> check bean definition.
	BeanFactory parentBeanFactory = getParentBeanFactory();
	if (parentBeanFactory != null && !containsBeanDefinition(beanName)) {
		// No bean definition found in this factory -> delegate to parent.
		return parentBeanFactory.getType(originalBeanName(name));
	}

	RootBeanDefinition mbd = getMergedLocalBeanDefinition(beanName);

	// Check decorated bean definition, if any: We assume it'll be easier
	// to determine the decorated bean's type than the proxy's type.
	BeanDefinitionHolder dbd = mbd.getDecoratedDefinition();
	if (dbd != null && !BeanFactoryUtils.isFactoryDereference(name)) {
		RootBeanDefinition tbd = getMergedBeanDefinition(dbd.getBeanName(), dbd.getBeanDefinition(), mbd);
		Class<?> targetClass = predictBeanType(dbd.getBeanName(), tbd);
		if (targetClass != null && !FactoryBean.class.isAssignableFrom(targetClass)) {
			return targetClass;
		}
	}

	Class<?> beanClass = predictBeanType(beanName, mbd);

	// Check bean class whether we're dealing with a FactoryBean.
	if (beanClass != null && FactoryBean.class.isAssignableFrom(beanClass)) {
		if (!BeanFactoryUtils.isFactoryDereference(name)) {
			// If it's a FactoryBean, we want to look at what it creates, not at the factory class.
			return getTypeForFactoryBean(beanName, mbd);
		}
		else {
			return beanClass;
		}
	}
	else {
		return (!BeanFactoryUtils.isFactoryDereference(name) ? beanClass : null);
	}
}
 

@Override
public Class<?> getType(String name) throws NoSuchBeanDefinitionException {
	String beanName = transformedBeanName(name);

	// Check manually registered singletons.
	Object beanInstance = getSingleton(beanName, false);
	if (beanInstance != null) {
		if (beanInstance instanceof FactoryBean && !BeanFactoryUtils.isFactoryDereference(name)) {
			return getTypeForFactoryBean((FactoryBean<?>) beanInstance);
		}
		else {
			return beanInstance.getClass();
		}
	}
	else if (containsSingleton(beanName) && !containsBeanDefinition(beanName)) {
		// null instance registered
		return null;
	}

	else {
		// No singleton instance found -> check bean definition.
		BeanFactory parentBeanFactory = getParentBeanFactory();
		if (parentBeanFactory != null && !containsBeanDefinition(beanName)) {
			// No bean definition found in this factory -> delegate to parent.
			return parentBeanFactory.getType(originalBeanName(name));
		}

		RootBeanDefinition mbd = getMergedLocalBeanDefinition(beanName);

		// Check decorated bean definition, if any: We assume it'll be easier
		// to determine the decorated bean's type than the proxy's type.
		BeanDefinitionHolder dbd = mbd.getDecoratedDefinition();
		if (dbd != null && !BeanFactoryUtils.isFactoryDereference(name)) {
			RootBeanDefinition tbd = getMergedBeanDefinition(dbd.getBeanName(), dbd.getBeanDefinition(), mbd);
			Class<?> targetClass = predictBeanType(dbd.getBeanName(), tbd);
			if (targetClass != null && !FactoryBean.class.isAssignableFrom(targetClass)) {
				return targetClass;
			}
		}

		Class<?> beanClass = predictBeanType(beanName, mbd);

		// Check bean class whether we're dealing with a FactoryBean.
		if (beanClass != null && FactoryBean.class.isAssignableFrom(beanClass)) {
			if (!BeanFactoryUtils.isFactoryDereference(name)) {
				// If it's a FactoryBean, we want to look at what it creates, not at the factory class.
				return getTypeForFactoryBean(beanName, mbd);
			}
			else {
				return beanClass;
			}
		}
		else {
			return (!BeanFactoryUtils.isFactoryDereference(name) ? beanClass : null);
		}
	}
}
 

/**
 * Create a BeanFactoryAspectInstanceFactory. AspectJ will be called to
 * introspect to create AJType metadata using the type returned for the
 * given bean name from the BeanFactory.
 * @param beanFactory BeanFactory to obtain instance(s) from
 * @param name name of the bean
 */
public BeanFactoryAspectInstanceFactory(BeanFactory beanFactory, String name) {
	this(beanFactory, name, beanFactory.getType(name));
}
 

/**
 * Create a BeanFactoryAspectInstanceFactory. AspectJ will be called to
 * introspect to create AJType metadata using the type returned for the
 * given bean name from the BeanFactory.
 * @param beanFactory BeanFactory to obtain instance(s) from
 * @param name name of the bean
 */
public BeanFactoryAspectInstanceFactory(BeanFactory beanFactory, String name) {
	this(beanFactory, name, beanFactory.getType(name));
}