abstractbeanfactory.java

spring api 源代码

			}
			else {
				return false;
			}
		}
	}

	public boolean isPrototype(String name) throws NoSuchBeanDefinitionException {
		String beanName = transformedBeanName(name);

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

		RootBeanDefinition bd = getMergedBeanDefinition(beanName, false);

		// In case of FactoryBean, return singleton status of created object if not a dereference.
		if (bd.isPrototype()) {
			return (!BeanFactoryUtils.isFactoryDereference(name) || isBeanClassMatch(beanName, bd, FactoryBean.class));
		}
		else {
			// Singleton or scoped - not a prototype.
			// However, FactoryBean may still produce a prototype object...
			if (!BeanFactoryUtils.isFactoryDereference(name) && isBeanClassMatch(beanName, bd, FactoryBean.class)) {
				FactoryBean factoryBean = (FactoryBean) getBean(FACTORY_BEAN_PREFIX + beanName);
				return ((factoryBean instanceof SmartFactoryBean && ((SmartFactoryBean) factoryBean).isPrototype()) ||
						!factoryBean.isSingleton());
			}
			else {
				return false;
			}
		}
	}

	public boolean isTypeMatch(String name, Class targetType) throws NoSuchBeanDefinitionException {
		String beanName = transformedBeanName(name);
		Class typeToMatch = (targetType != null ? targetType : Object.class);

		// Check manually registered singletons.
		Object beanInstance = getSingleton(beanName);
		if (beanInstance != null) {
			if (beanInstance instanceof FactoryBean) {
				if (!BeanFactoryUtils.isFactoryDereference(name)) {
					Class type = getTypeForFactoryBean((FactoryBean) beanInstance);
					return (type != null && typeToMatch.isAssignableFrom(type));
				}
				else {
					return typeToMatch.isAssignableFrom(beanInstance.getClass())					;
				}
			}
			else {
				return !BeanFactoryUtils.isFactoryDereference(name) &&
						typeToMatch.isAssignableFrom(beanInstance.getClass());
			}
		}

		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.isTypeMatch(originalBeanName(name), targetType);
			}

			RootBeanDefinition mbd = getMergedBeanDefinition(beanName, false);
			Class beanClass = predictBeanType(beanName, mbd);

			if (beanClass == null) {
				return false;
			}

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

	public Class getType(String name) throws NoSuchBeanDefinitionException {
		String beanName = transformedBeanName(name);

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

		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 = getMergedBeanDefinition(beanName, false);
			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 the factory class.
					return getTypeForFactoryBean(beanName, mbd);
				}
				else {
					return beanClass;
				}
			}
			else {
				return (!BeanFactoryUtils.isFactoryDereference(name) ? beanClass : null);
			}
		}
	}

	public String[] getAliases(String name) {
		String beanName = transformedBeanName(name);
		List aliases = new ArrayList();
		boolean factoryPrefix = name.startsWith(FACTORY_BEAN_PREFIX);
		String fullBeanName = beanName;
		if (factoryPrefix) {
			fullBeanName = FACTORY_BEAN_PREFIX + beanName;
		}
		if (!fullBeanName.equals(name)) {
			aliases.add(fullBeanName);
		}
		synchronized (this.aliasMap) {
			for (Iterator it = this.aliasMap.entrySet().iterator(); it.hasNext();) {
				Map.Entry entry = (Map.Entry) it.next();
				if (entry.getValue().equals(beanName)) {
					String key = (factoryPrefix ? FACTORY_BEAN_PREFIX : "") + entry.getKey();
					if (!key.equals(name)) {
						aliases.add(key);
					}
				}
			}
		}
		if (!containsSingleton(beanName) && !containsBeanDefinition(beanName)) {
			BeanFactory parentBeanFactory = getParentBeanFactory();
			if (parentBeanFactory != null) {
				aliases.addAll(Arrays.asList(parentBeanFactory.getAliases(fullBeanName)));
			}
		}
		return StringUtils.toStringArray(aliases);
	}


	//---------------------------------------------------------------------
	// Implementation of HierarchicalBeanFactory interface
	//---------------------------------------------------------------------

	public BeanFactory getParentBeanFactory() {
		return this.parentBeanFactory;
	}

	public boolean containsLocalBean(String name) {
		String beanName = transformedBeanName(name);
		return ((containsSingleton(beanName) || containsBeanDefinition(beanName)) &&
				(!BeanFactoryUtils.isFactoryDereference(name) || isFactoryBean(beanName)));
	}


	//---------------------------------------------------------------------
	// Implementation of ConfigurableBeanFactory interface
	//---------------------------------------------------------------------

	public void setParentBeanFactory(BeanFactory parentBeanFactory) {
		if (this.parentBeanFactory != null && this.parentBeanFactory != parentBeanFactory) {
			throw new IllegalStateException("Already associated with parent BeanFactory: " + this.parentBeanFactory);
		}
		this.parentBeanFactory = parentBeanFactory;
	}

	public void setBeanClassLoader(ClassLoader beanClassLoader) {
		this.beanClassLoader = (beanClassLoader != null ? beanClassLoader : ClassUtils.getDefaultClassLoader());
	}

	public ClassLoader getBeanClassLoader() {
		return this.beanClassLoader;
	}

	public void setCacheBeanMetadata(boolean cacheBeanMetadata) {
		this.cacheBeanMetadata = cacheBeanMetadata;
	}

	public boolean isCacheBeanMetadata() {
		return this.cacheBeanMetadata;
	}

	public void addPropertyEditorRegistrar(PropertyEditorRegistrar registrar) {
		Assert.notNull(registrar, "PropertyEditorRegistrar must not be null");
		this.propertyEditorRegistrars.add(registrar);
	}

	/**
	 * Return the set of PropertyEditorRegistrars.
	 */
	public Set getPropertyEditorRegistrars() {
		return this.propertyEditorRegistrars;
	}

	public void registerCustomEditor(Class requiredType, PropertyEditor propertyEditor) {
		Assert.notNull(requiredType, "Required type must not be null");
		Assert.notNull(propertyEditor, "PropertyEditor must not be null");
		this.customEditors.put(requiredType, propertyEditor);
	}

	/**
	 * Return the map of custom editors, with Classes as keys
	 * and PropertyEditors as values.
	 */
	public Map getCustomEditors() {
		return this.customEditors;
	}

	public TypeConverter getTypeConverter() {
		SimpleTypeConverter typeConverter = new SimpleTypeConverter();
		registerCustomEditors(typeConverter);
		return typeConverter;
	}

	public void addBeanPostProcessor(BeanPostProcessor beanPostProcessor) {
		Assert.notNull(beanPostProcessor, "BeanPostProcessor must not be null");
		this.beanPostProcessors.add(beanPostProcessor);
		if (beanPostProcessor instanceof InstantiationAwareBeanPostProcessor) {
			this.hasInstantiationAwareBeanPostProcessors = true;
		}
		if (beanPostProcessor instanceof DestructionAwareBeanPostProcessor) {
			this.hasDestructionAwareBeanPostProcessors = true;
		}
	}

	public int getBeanPostProcessorCount() {
		return this.beanPostProcessors.size();
	}

	/**
	 * Return the list of BeanPostProcessors that will get applied
	 * to beans created with this factory.
	 */
	public List getBeanPostProcessors() {
		return this.beanPostProcessors;
	}

	/**
	 * Return whether this factory holds a InstantiationAwareBeanPostProcessor
	 * that will get applied to singleton beans on shutdown.
	 * @see #addBeanPostProcessor
	 * @see org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor
	 */
	protected boolean hasInstantiationAwareBeanPostProcessors() {
		return this.hasInstantiationAwareBeanPostProcessors;
	}

	/**
	 * Return whether this factory holds a DestructionAwareBeanPostProcessor
	 * that will get applied to singleton beans on shutdown.
	 * @see #addBeanPostProcessor
	 * @see org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor
	 */
	protected boolean hasDestructionAwareBeanPostProcessors() {
		return this.hasDestructionAwareBeanPostProcessors;
	}

	public void registerScope(String scopeName, Scope scope) {
		Assert.notNull(scopeName, "Scope identifier must not be null");
		Assert.notNull(scope, "Scope must not be null");
		if (SCOPE_SINGLETON.equals(scopeName) || SCOPE_PROTOTYPE.equals(scopeName)) {
			throw new IllegalArgumentException("Cannot replace existing scopes 'singleton' and 'prototype'");
		}
		this.scopes.put(scopeName, scope);
	}

	public String[] getRegisteredScopeNames() {
		return StringUtils.toStringArray(this.scopes.keySet());
	}

	public Scope getRegisteredScope(String scopeName) {
		Assert.notNull(scopeName, "Scope identifier must not be null");
		return (Scope) this.scopes.get(scopeName);
	}

	public void copyConfigurationFrom(ConfigurableBeanFactory otherFactory) {
		Assert.notNull(otherFactory, "BeanFactory must not be null");
		setBeanClassLoader(otherFactory.getBeanClassLoader());
		setCacheBeanMetadata(otherFactory.isCacheBeanMetadata());
		if (otherFactory instanceof AbstractBeanFactory) {
			AbstractBeanFactory otherAbstractFactory = (AbstractBeanFactory) otherFactory;
			this.customEditors.putAll(otherAbstractFactory.customEditors);
			this.propertyEditorRegistrars.addAll(otherAbstractFactory.propertyEditorRegistrars);
			this.beanPostProcessors.addAll(otherAbstractFactory.beanPostProcessors);
			this.hasInstantiationAwareBeanPostProcessors = this.hasInstantiationAwareBeanPostProcessors ||
					otherAbstractFactory.hasInstantiationAwareBeanPostProcessors;
			this.hasDestructionAwareBeanPostProcessors = this.hasDestructionAwareBeanPostProcessors ||
					otherAbstractFactory.hasDestructionAwareBeanPostProcessors;
			this.scopes.putAll(otherAbstractFactory.scopes);
		}
	}

	public void registerAlias(String beanName, String alias) throws BeanDefinitionStoreException {
		Assert.hasText(beanName, "'beanName' must not be empty");
		Assert.hasText(alias, "'alias' must not be empty");
		if (!alias.equals(beanName)) {
			// Only actually register the alias if it is not equal to the bean name itself.
			if (logger.isDebugEnabled()) {
				logger.debug("Registering alias '" + alias + "' for bean with name '" + beanName + "'");
			}
			synchronized (this.aliasMap) {
				Object registeredName = this.aliasMap.get(alias);
				if (registeredName != null && !registeredName.equals(beanName)) {
					throw new BeanDefinitionStoreException("Cannot register alias '" + alias + "' for bean name '" +
							beanName + "': It's already registered for bean name '" + registeredName + "'.");
				}
				this.aliasMap.put(alias, beanName);
			}
		}
	}

	/**
	 * Callback before prototype creation.
	 * <p>The default implementation register the prototype as currently in creation.
	 * @param beanName the name of the prototype about to be created
	 * @see #isPrototypeCurrentlyInCreation
	 */
	protected void beforePrototypeCreation(String beanName) {
		Object curVal = this.prototypesCurrentlyInCreation.get();
		if (curVal == null) {
			this.prototypesCurrentlyInCreation.set(beanName);
		}
		else if (curVal instanceof String) {
			Set beanNameSet = new HashSet(2);
			beanNameSet.add(curVal);
			beanNameSet.add(beanName);
			this.prototypesCurrentlyInCreation.set(beanNameSet);
		}
		else {
			Set beanNameSet = (Set) curVal;
			beanNameSet.add(beanName);
		}
	}

	/**
	 * Callback after prototype creation.
	 * <p>The default implementation marks the prototype as not in creation anymore.