from AbstractApplicationContext * fixed AbstractBeanFactory to allow child bean definitions to refer to a parent via its alias name * fixed AbstractBeanFactory to correctly delegate to parent BeanFactory "isFactoryBean" * optimized AbstractBeanFactory to avoid internal NoSuchBeanDefinitionException throw+catch as far as possible * reworked AbstractBeanFactory's currently-in-creation check to singleton is returned * fixed AbstractBeanFactory to use canonical bean name (id) for prototype creation, exposing it to BeanPostProcessors * fixed AbstractBeanFactory to destroy a failed bean completely

mentions the names of all matching beans * AbstractBeanFactory keeps singleton beans in registration order (requires JDK 1.4 or Commons Collections) * AbstractBeanFactory does not explicitly register a given to the canonical bean name * AbstractBeanFactory supports alias chaining, with an alias registered for a bean name that is itself an alias * fixed AbstractBeanFactory to accept re-registration of alias property to PropertiesFactoryBean, for merging multiple local Properties instances * fixed AbstractBeanFactory to avoid potential deadlock on singleton destruction with concurrent singleton creation * fixed

factored out FactoryBeanRegistrySupport base class from AbstractBeanFactory and AbstractAutowireCapableBeanFactory * optimized AbstractBeanFactory's access to cached FactoryBean-exposed objects, avoiding "addPropertyEditorRegistrar" * AbstractBeanFactory ignores PropertyEditorRegistrars which tried to obtain a currently created bean * revised AbstractBeanFactory to detect FactoryBeans which are in Annotated/ScannedGenericBeanDefinition * fixed AbstractBeanFactory's type check to ignore a null value (as potentially exposed by a FactoryBean) * fixed AbstractBeanFactory to never cache FactoryBean-exposed

"getEarlyBeanReference" hook to SmartInstantiationAwareBeanPostProcessor interface * AbstractBeanFactory does not log full exception stack trace (at debug level) on FactoryBean type check anymore names as well * factored out AliasRegistry/SimpleAliasRegistry from BeanDefinitionRegistry/AbstractBeanFactory * introduced SimpleBeanDefinitionRegistry implementation for bean definition reader factored out FactoryBeanRegistrySupport base class from AbstractBeanFactory and AbstractAutowireCapableBeanFactory * optimized AbstractBeanFactory's access to cached FactoryBean-exposed objects, avoiding

* factored out AliasRegistry/SimpleAliasRegistry from BeanDefinitionRegistry/AbstractBeanFactory * introduced SimpleBeanDefinitionRegistry implementation for bean definition reader testing factored out FactoryBeanRegistrySupport base class from AbstractBeanFactory and AbstractAutowireCapableBeanFactory * optimized AbstractBeanFactory's access to cached FactoryBean-exposed objects, avoiding "addPropertyEditorRegistrar" * AbstractBeanFactory ignores PropertyEditorRegistrars which tried to obtain a currently created bean * revised AbstractBeanFactory to detect FactoryBeans which are in

without actually loading the Class * AbstractBeanFactory supports alias chaining, with an alias registered for a bean name that is itself an alias * AbstractBeanFactory uses bean name as cache key for merged avoid equality matching overhead * AbstractBeanFactory detects circular references between non-singletons and throws a corresponding exception * AbstractBeanFactory overrides an inner bean's singleton keeps singleton beans in registration order (requires JDK 1.4 or Commons Collections) * AbstractBeanFactory does not explicitly register a given alias that is equal to the canonical bean name * dropped

"getEarlyBeanReference" hook to SmartInstantiationAwareBeanPostProcessor interface * AbstractBeanFactory does not log full exception stack trace (at debug level) on FactoryBean type check anymore names as well * factored out AliasRegistry/SimpleAliasRegistry from BeanDefinitionRegistry/AbstractBeanFactory $ ^{*} $ introduced SimpleBeanDefinitionRegistry implementation for bean definition factored out FactoryBeanRegistrySupport base class from AbstractBeanFactory and AbstractAutowireCapableBeanFactory * optimized AbstractBeanFactory's access to cached FactoryBean-exposed objects, avoiding

DefaultSingletonBeanRegistry eagerly cleans up cached dependency information when destroying a bean * AbstractBeanFactory rejects getBean request with arguments in case of a pre-existing singleton of same name as "getEarlyBeanReference" hook to SmartInstantiationAwareBeanPostProcessor interface * AbstractBeanFactory does not log full exception stack trace (at debug level) on FactoryBean type check anymore names as well * factored out AliasRegistry/SimpleAliasRegistry from BeanDefinitionRegistry/AbstractBeanFactory * introduced SimpleBeanDefinitionRegistry implementation for bean definition reader testing

DefaultSingletonBeanRegistry eagerly cleans up cached dependency information when destroying a bean * AbstractBeanFactory rejects getBean request with arguments in case of a pre-existing singleton of same name as "getEarlyBeanReference" hook to SmartInstantiationAwareBeanPostProcessor interface * AbstractBeanFactory does not log full exception stack trace (at debug level) on FactoryBean type check anymore names as well * factored out AliasRegistry/SimpleAliasRegistry from BeanDefinitionRegistry/AbstractBeanFactory $ ^{*} $ introduced SimpleBeanDefinitionRegistry implementation for bean definition reader

"determineConstructor(beanClass, beanName)" method to SmartInstantiationAwareBeanPostProcessor * AbstractBeanFactory's "containsBean"/"isSingleton"/"isTypeMatch"/"etc" behave behave correctly for "&" FactoryBean dereferences AbstractBeanFactory uses concurrent Maps for singletons, aliases and bean definitions (for better concurrency) DefaultListableBeanFactory PropertyPlaceholderConfigurer detects and processes placeholders in scope names as well * AbstractBeanFactory throws BeanCreationException will full context info if "postProcessObjectFromFactoryBean"