## org.springframework.beans.factory.support
Class DefaultListableBeanFactory

    java.lang.Object
      org.springframework.core.SimpleAliasRegistry
          org.springframework.beans.factory.support.DefaultSingletonBeanRegistry
              org.springframework.beans.factory.support.FactoryBeanRegistrySupport
                  org.springframework.beans.factory.support.AbstractBeanFactory
                      org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory
                          org.springframework.beans.factory.support.DefaultListableBeanFactory

All Implemented Interfaces:
  BeanFactory, AutowireCapableBeanFactory, ConfigurableBeanFactory, ConfigurableListableBeanFactory, SingletonBeanRegistry, HierarchicalBeanFactory, ListableBeanFactory, BeanDefinitionRegistry, AliasRegistry

Direct Known Subclasses:
  XmlBeanFactory

    public class DefaultListableBeanFactory

extends AbstractAutowireCapableBeanFactory
implements ConfigurableListableBeanFactory, BeanDefinitionRegistry

Default implementation of the `ListableBeanFactory` and `BeanDefinitionRegistry` interfaces: a full-fledged bean factory based on bean definition objects.

Typical usage is registering all bean definitions first (possibly read from a bean definition file), before accessing beans. Bean definition lookup is therefore an inexpensive operation in a local bean definition table, operating on pre-built bean definition metadata objects.

Can be used as a standalone bean factory, or as a superclass for custom bean factories. Note that readers for specific bean definition formats are typically implemented separately rather than as bean factory subclasses: see for example `PropertiesBeanDefinitionReader` and `XmlBeanDefinitionReader`.

For an alternative implementation of the `ListableBeanFactory` interface, have a look at `StaticListableBeanFactory`, which manages existing bean instances rather than creating new ones based on bean definitions.

Since:
  16 April 2001
Author:
  Rod Johnson, Juergen Hoeller, Sam Brannen
See Also:
  `StaticListableBeanFactory`, `PropertiesBeanDefinitionReader`, `XmlBeanDefinitionReader`

Field Summary

Fields inherited from class org.springframework.beans.factory.support.DefaultSingletonBeanRegistry
`logger, NULL_OBJECT`

Fields inherited from interface org.springframework.beans.factory.config.AutowireCapableBeanFactory
`AUTOWIRE_AUTODETECT, AUTOWIRE_BY_NAME, AUTOWIRE_BY_TYPE, AUTOWIRE_CONSTRUCTOR, AUTOWIRE_NO`

Fields inherited from interface org.springframework.beans.factory.config.ConfigurableBeanFactory
`SCOPE_PROTOTYPE, SCOPE_SINGLETON`

Fields inherited from interface org.springframework.beans.factory.BeanFactory
`FACTORY_BEAN_PREFIX`

Constructor Summary
`DefaultListableBeanFactory()` Create a new DefaultListableBeanFactory.
`DefaultListableBeanFactory(BeanFactory parentBeanFactory)` Create a new DefaultListableBeanFactory with the given parent.

Method Summary
`protected boolean` `allowAliasOverriding()` Only allows alias overriding if bean definition overriding is allowed.
`boolean` `containsBeanDefinition(String beanName)` Check if this bean factory contains a bean definition with the given name.
`void` `copyConfigurationFrom(ConfigurableBeanFactory otherFactory)` Copy all relevant configuration from the given other factory.
`protected String` `determinePrimaryCandidate(Map candidateBeans, Class type)` Determine the primary autowire candidate in the given set of beans.
`protected Map` `findAutowireCandidates(String beanName, Class requiredType, DependencyDescriptor descriptor)` Find bean instances that match the required type.
`void` `freezeConfiguration()` Freeze all bean definitions, signalling that the registered bean definitions will not be modified or post-processed any further.
`AutowireCandidateResolver` `getAutowireCandidateResolver()` Return the autowire candidate resolver for this BeanFactory (never `null`).
`BeanDefinition` `getBeanDefinition(String beanName)` Return the bean definition for the given bean name.
`int` `getBeanDefinitionCount()` Return the number of beans defined in the factory.
`String[]` `getBeanDefinitionNames()` Return the names of all beans defined in this factory.
`String[]` `getBeanNamesForType(Class type)` Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.
`String[]` `getBeanNamesForType(Class type, boolean includeNonSingletons, boolean allowEagerInit)` Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.
`Map` `getBeansOfType(Class type)` Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.
`Map` `getBeansOfType(Class type, boolean includeNonSingletons, boolean allowEagerInit)` Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.
`boolean` `isAutowireCandidate(String beanName, DependencyDescriptor descriptor)` Determine whether the specified bean qualifies as an autowire candidate, to be injected into other beans which declare a dependency of matching type.
`protected boolean` `isAutowireCandidate(String beanName, RootBeanDefinition mbd, DependencyDescriptor descriptor)` Determine whether the specified bean definition qualifies as an autowire candidate, to be injected into other beans which declare a dependency of matching type.
`protected boolean` `isBeanEligibleForMetadataCaching(String beanName)` Considers all beans as eligible for metdata caching if the factory's configuration has been marked as frozen.
`boolean` `isConfigurationFrozen()` Return whether this factory's bean definitions are frozen, i.e. are not supposed to be modified or post-processed any further.
`protected boolean` `isPrimary(String beanName, Object beanInstance)` Return whether the bean definition for the given bean name has been marked as a primary bean.
`void` `preInstantiateSingletons()` Ensure that all non-lazy-init singletons are instantiated, also considering `FactoryBeans`.
`void` `registerBeanDefinition(String beanName, BeanDefinition beanDefinition)` Register a new bean definition with this registry.
`void` `registerResolvableDependency(Class dependencyType, Object autowiredValue)` Register a special dependency type with corresponding autowired value.
`void` `removeBeanDefinition(String beanName)` Remove the BeanDefinition for the given name.
`protected void` `resetBeanDefinition(String beanName)` Reset all bean definition caches for the given bean, including the caches of beans that are derived from it.
`Object` `resolveDependency(DependencyDescriptor descriptor, String beanName, Set autowiredBeanNames, TypeConverter typeConverter)` Resolve the specified dependency against the beans defined in this factory.
`void` `setAllowBeanDefinitionOverriding(boolean allowBeanDefinitionOverriding)` Set whether it should be allowed to override bean definitions by registering a different definition with the same name, automatically replacing the former.
`void` `setAllowEagerClassLoading(boolean allowEagerClassLoading)` Set whether the factory is allowed to eagerly load bean classes even for bean definitions that are marked as "lazy-init".
`void` `setAutowireCandidateResolver(AutowireCandidateResolver autowireCandidateResolver)` Set a custom autowire candidate resolver for this BeanFactory to use when deciding whether a bean definition should be considered as a candidate for autowiring.
`String` `toString()`

Methods inherited from class org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory

`applyBeanPostProcessorsAfterInitialization, applyBeanPostProcessorsBeforeInitialization, applyBeanPostProcessorsBeforeInstantiation, applyBeanPropertyValues, applyMergedBeanDefinitionPostProcessors, applyPropertyValues, autowire, autowireBean, autowireBeanProperties, autowireByName, autowireByType, autowireConstructor, checkDependencies, configureBean, createBean, createBean, createBean, createBeanInstance, determineConstructorsFromBeanPostProcessors, doCreateBean, filterPropertyDescriptorsForDependencyCheck, getEarlyBeanReference, getInstantiationStrategy, getTypeForFactoryBean, getTypeForFactoryMethod, ignoreDependencyInterface, ignoreDependencyType, initializeBean, initializeBean, instantiateBean, instantiateUsingFactoryMethod, invokeCustomInitMethod, invokeInitMethods, isExcludedFromDependencyCheck, populateBean, postProcessObjectFromFactoryBean, predictBeanType, removeSingleton, resolveBeforeInstantiation, resolveDependency, setAllowCircularReferences, setAllowRawInjectionDespiteWrapping, setInstantiationStrategy, unsatisfiedNonSimpleProperties`

Methods inherited from class org.springframework.beans.factory.support.AbstractBeanFactory

`addBeanPostProcessor, addPropertyEditorRegistrar, afterPrototypeCreation, beforePrototypeCreation, checkMergedBeanDefinition, clearMergedBeanDefinition, containsBean, containsLocalBean, copyRegisteredEditorsTo, destroyBean, destroyBean, destroyScopedBean, doGetBean, getAliases, getBean, getBean, getBean, getBean, getBeanClassLoader, getBeanPostProcessorCount, getBeanPostProcessors, getCustomEditors, getCustomTypeConverter, getMergedBeanDefinition, getMergedBeanDefinition, getMergedBeanDefinition, getMergedLocalBeanDefinition, getObjectForBeanInstance, getParentBeanFactory, getPropertyEditorRegistrars, getRegisteredScope, getRegisteredScopeNames, getTempClassLoader, getType, getTypeConverter, hasDestructionAwareBeanPostProcessors, hasInstantiationAwareBeanPostProcessors, initBeanWrapper, isBeanNameInUse, isCacheBeanMetadata, isCurrentlyInCreation, isFactoryBean, isFactoryBean, isPrototype, isPrototypeCurrentlyInCreation, isSingleton, isTypeMatch, markBeanAsCreated, originalBeanName, registerCustomEditor, registerCustomEditor, registerCustomEditors, registerDisposableBeanIfNecessary, registerScope, removeSingletonIfCreatedForTypeCheckOnly, requiresDestruction, resolveBeanClass, resolveBeanClass, setBeanClassLoader, setCacheBeanMetadata, setParentBeanFactory, setTempClassLoader, setTypeConverter, transformedBeanName`

Methods inherited from class org.springframework.beans.factory.support.FactoryBeanRegistrySupport
`getCachedObjectForFactoryBean, getFactoryBean, getObjectFromFactoryBean, getTypeForFactoryBean`

Methods inherited from class org.springframework.beans.factory.support.DefaultSingletonBeanRegistry

`addSingleton, addSingletonFactory, afterSingletonCreation, beforeSingletonCreation, containsSingleton, destroyBean, destroySingleton, destroySingletons, getDependenciesForBean, getDependentBeans, getSingleton, getSingleton, getSingleton, getSingletonCount, getSingletonMutex, getSingletonNames, hasDependentBean, isSingletonCurrentlyInCreation, onSuppressedException, registerContainedBean, registerDependentBean, registerDisposableBean, registerSingleton`

Methods inherited from class org.springframework.core.SimpleAliasRegistry
`canonicalName, isAlias, registerAlias, removeAlias, resolveAliases`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface org.springframework.beans.factory.config.ConfigurableListableBeanFactory
`ignoreDependencyInterface, ignoreDependencyType`

Methods inherited from interface org.springframework.beans.factory.config.AutowireCapableBeanFactory
`applyBeanPostProcessorsAfterInitialization, applyBeanPostProcessorsBeforeInitialization, applyBeanPropertyValues, autowire, autowireBean, autowireBeanProperties, configureBean, createBean, createBean, initializeBean, resolveDependency`

Methods inherited from interface org.springframework.beans.factory.config.ConfigurableBeanFactory

`addBeanPostProcessor, addPropertyEditorRegistrar, copyRegisteredEditorsTo, destroyBean, destroyScopedBean, destroySingletons, getBeanClassLoader, getBeanPostProcessorCount, getDependenciesForBean, getDependentBeans, getMergedBeanDefinition, getRegisteredScope, getRegisteredScopeNames, getTempClassLoader, getTypeConverter, isCacheBeanMetadata, isCurrentlyInCreation, isFactoryBean, registerAlias, registerCustomEditor, registerCustomEditor, registerDependentBean, registerScope, resolveAliases, setBeanClassLoader, setCacheBeanMetadata, setParentBeanFactory, setTempClassLoader, setTypeConverter`

Methods inherited from interface org.springframework.beans.factory.HierarchicalBeanFactory
`containsLocalBean, getParentBeanFactory`

Methods inherited from interface org.springframework.beans.factory.BeanFactory
`containsBean, getAliases, getBean, getBean, getBean, getType, isPrototype, isSingleton, isTypeMatch`

Methods inherited from interface org.springframework.beans.factory.config.SingletonBeanRegistry
`containsSingleton, getSingleton, getSingletonCount, getSingletonNames, registerSingleton`

Methods inherited from interface org.springframework.beans.factory.support.BeanDefinitionRegistry
`isBeanNameInUse`

Methods inherited from interface org.springframework.core.AliasRegistry
`getAliases, isAlias, registerAlias, removeAlias`

Constructor Detail

### DefaultListableBeanFactory

    public DefaultListableBeanFactory()

  Create a new DefaultListableBeanFactory.

### DefaultListableBeanFactory

    public DefaultListableBeanFactory(BeanFactory parentBeanFactory)

  Create a new DefaultListableBeanFactory with the given parent.

  Parameters:
    `parentBeanFactory` - the parent BeanFactory

Method Detail

### setAutowireCandidateResolver

    public void setAutowireCandidateResolver(AutowireCandidateResolver autowireCandidateResolver)

  Set a custom autowire candidate resolver for this BeanFactory to use when deciding whether a bean definition should be considered as a candidate for autowiring.

### getAutowireCandidateResolver

    public AutowireCandidateResolver getAutowireCandidateResolver()

  Return the autowire candidate resolver for this BeanFactory (never `null`).

### setAllowBeanDefinitionOverriding

    public void setAllowBeanDefinitionOverriding(boolean allowBeanDefinitionOverriding)

  Set whether it should be allowed to override bean definitions by registering a different definition with the same name, automatically replacing the former. If not, an exception will be thrown. This also applies to overriding aliases.

  Default is "true".

  See Also:
    `registerBeanDefinition(java.lang.String, org.springframework.beans.factory.config.BeanDefinition)`

### setAllowEagerClassLoading

    public void setAllowEagerClassLoading(boolean allowEagerClassLoading)

  Set whether the factory is allowed to eagerly load bean classes even for bean definitions that are marked as "lazy-init".

  Default is "true". Turn this flag off to suppress class loading for lazy-init beans unless such a bean is explicitly requested. In particular, by-type lookups will then simply ignore bean definitions without resolved class name, instead of loading the bean classes on demand just to perform a type check.

  See Also:
    `AbstractBeanDefinition.setLazyInit(boolean)`

### copyConfigurationFrom

    public void copyConfigurationFrom(ConfigurableBeanFactory otherFactory)

  Description copied from interface: `ConfigurableBeanFactory`
  Copy all relevant configuration from the given other factory.

  Should include all standard configuration settings as well as BeanPostProcessors, Scopes, and factory-specific internal settings. Should not include any metadata of actual bean definitions, such as BeanDefinition objects and bean name aliases.

  Specified by:
    `copyConfigurationFrom` in interface `ConfigurableBeanFactory`
  Overrides:
    `copyConfigurationFrom` in class `AbstractAutowireCapableBeanFactory`
  Parameters:
    `otherFactory` - the other BeanFactory to copy from

### containsBeanDefinition

    public boolean containsBeanDefinition(String beanName)

  Description copied from class: `AbstractBeanFactory`
  Check if this bean factory contains a bean definition with the given name. Does not consider any hierarchy this factory may participate in. Invoked by `containsBean` when no cached singleton instance is found.

  Depending on the nature of the concrete bean factory implementation, this operation might be expensive (for example, because of directory lookups in external registries). However, for listable bean factories, this usually just amounts to a local hash lookup: The operation is therefore part of the public interface there. The same implementation can serve for both this template method and the public interface method in that case.

  Specified by:
    `containsBeanDefinition` in interface `ListableBeanFactory`
  Specified by:
    `containsBeanDefinition` in interface `BeanDefinitionRegistry`
  Specified by:
    `containsBeanDefinition` in class `AbstractBeanFactory`
  Parameters:
    `beanName` - the name of the bean to look for
  Returns:
    if this bean factory contains a bean definition with the given name
  See Also:
    `AbstractBeanFactory.containsBean(java.lang.String)`, `ListableBeanFactory.containsBeanDefinition(java.lang.String)`

### getBeanDefinitionCount

    public int getBeanDefinitionCount()

  Description copied from interface: `ListableBeanFactory`
  Return the number of beans defined in the factory.

  Does not consider any hierarchy this factory may participate in, and ignores any singleton beans that have been registered by other means than bean definitions.

  Specified by:
    `getBeanDefinitionCount` in interface `ListableBeanFactory`
  Specified by:
    `getBeanDefinitionCount` in interface `BeanDefinitionRegistry`
  Returns:
    the number of beans defined in the factory

### getBeanDefinitionNames

    public String[] getBeanDefinitionNames()

  Description copied from interface: `ListableBeanFactory`
  Return the names of all beans defined in this factory.

  Does not consider any hierarchy this factory may participate in, and ignores any singleton beans that have been registered by other means than bean definitions.

  Specified by:
    `getBeanDefinitionNames` in interface `ListableBeanFactory`
  Specified by:
    `getBeanDefinitionNames` in interface `BeanDefinitionRegistry`
  Returns:
    the names of all beans defined in this factory, or an empty array if none defined

### getBeanNamesForType

    public String[] getBeanNamesForType(Class type)

  Description copied from interface: `ListableBeanFactory`
  Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.

  NOTE: This method introspects top-level beans only. It does not check nested beans which might match the specified type as well.

  Does consider objects created by FactoryBeans, which means that FactoryBeans will get initialized. If the object created by the FactoryBean doesn't match, the raw FactoryBean itself will be matched against the type.

  Does not consider any hierarchy this factory may participate in. Use BeanFactoryUtils' `beanNamesForTypeIncludingAncestors` to include beans in ancestor factories too.

  Note: Does not ignore singleton beans that have been registered by other means than bean definitions.

  This version of `getBeanNamesForType` matches all kinds of beans, be it singletons, prototypes, or FactoryBeans. In most implementations, the result will be the same as for `getBeanNamesOfType(type, true, true)`.

  Bean names returned by this method should always return bean names in the order of definition in the backend configuration, as far as possible.

  Specified by:
    `getBeanNamesForType` in interface `ListableBeanFactory`
  Parameters:
    `type` - the class or interface to match, or `null` for all bean names
  Returns:
    the names of beans (or objects created by FactoryBeans) matching the given object type (including subclasses), or an empty array if none
  See Also:
    `FactoryBean.getObjectType()`, `BeanFactoryUtils.beanNamesForTypeIncludingAncestors(ListableBeanFactory, Class)`

### getBeanNamesForType

    public String[] getBeanNamesForType(Class type,
                                        boolean includeNonSingletons,
                                        boolean allowEagerInit)

  Description copied from interface: `ListableBeanFactory`
  Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.

  NOTE: This method introspects top-level beans only. It does not check nested beans which might match the specified type as well.

  Does consider objects created by FactoryBeans if the "allowEagerInit" flag is set, which means that FactoryBeans will get initialized. If the object created by the FactoryBean doesn't match, the raw FactoryBean itself will be matched against the type. If "allowEagerInit" is not set, only raw FactoryBeans will be checked (which doesn't require initialization of each FactoryBean). $ *

  Does not consider any hierarchy this factory may participate in. Use BeanFactoryUtils' `beanNamesForTypeIncludingAncestors` to include beans in ancestor factories too.

  Note: Does not ignore singleton beans that have been registered by other means than bean definitions.

  Bean names returned by this method should always return bean names in the order of definition in the backend configuration, as far as possible.

  Specified by:
    `getBeanNamesForType` in interface `ListableBeanFactory`
  Parameters:
    `type` - the class or interface to match, or `null` for all bean names
    `includeNonSingletons` - whether to include prototype or scoped beans too or just singletons (also applies to FactoryBeans)
    `allowEagerInit` - whether to initialize lazy-init singletons and objects created by FactoryBeans (or by factory methods with a "factory-bean" reference) for the type check. Note that FactoryBeans need to be eagerly initialized to determine their type: So be aware that passing in "true" for this flag will initialize FactoryBeans and "factory-bean" references.
  Returns:
    the names of beans (or objects created by FactoryBeans) matching the given object type (including subclasses), or an empty array if none
  See Also:
    `FactoryBean.getObjectType()`, `BeanFactoryUtils.beanNamesForTypeIncludingAncestors(ListableBeanFactory, Class, boolean, boolean)`

### getBeansOfType

    public Map getBeansOfType(Class type)
                       throws BeansException

  Description copied from interface: `ListableBeanFactory`
  Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.

  NOTE: This method introspects top-level beans only. It does not check nested beans which might match the specified type as well.

  Does consider objects created by FactoryBeans, which means that FactoryBeans will get initialized. If the object created by the FactoryBean doesn't match, the raw FactoryBean itself will be matched against the type.

  Does not consider any hierarchy this factory may participate in. Use BeanFactoryUtils' `beansOfTypeIncludingAncestors` to include beans in ancestor factories too.

  Note: Does not ignore singleton beans that have been registered by other means than bean definitions.

  This version of getBeansOfType matches all kinds of beans, be it singletons, prototypes, or FactoryBeans. In most implementations, the result will be the same as for `getBeansOfType(type, true, true)`.

  The Map returned by this method should always return bean names and corresponding bean instances in the order of definition in the backend configuration, as far as possible.

  Specified by:
    `getBeansOfType` in interface `ListableBeanFactory`
  Parameters:
    `type` - the class or interface to match, or `null` for all concrete beans
  Returns:
    a Map with the matching beans, containing the bean names as keys and the corresponding bean instances as values
  Throws:
    `BeansException` - if a bean could not be created
  See Also:
    `FactoryBean.getObjectType()`, `BeanFactoryUtils.beansOfTypeIncludingAncestors(ListableBeanFactory, Class)`

### getBeansOfType

    public Map getBeansOfType(Class type,
                              boolean includeNonSingletons,
                              boolean allowEagerInit)
                       throws BeansException

  Description copied from interface: `ListableBeanFactory`
  Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of `getObjectType` in the case of FactoryBeans.

  NOTE: This method introspects top-level beans only. It does not check nested beans which might match the specified type as well.

  Does consider objects created by FactoryBeans if the "allowEagerInit" flag is set, which means that FactoryBeans will get initialized. If the object created by the FactoryBean doesn't match, the raw FactoryBean itself will be matched against the type. If "allowEagerInit" is not set, only raw FactoryBeans will be checked (which doesn't require initialization of each FactoryBean).

  Does not consider any hierarchy this factory may participate in. Use BeanFactoryUtils' `beansOfTypeIncludingAncestors` to include beans in ancestor factories too.

  Note: Does not ignore singleton beans that have been registered by other means than bean definitions.

  The Map returned by this method should always return bean names and corresponding bean instances in the order of definition in the backend configuration, as far as possible.

  Specified by:
    `getBeansOfType` in interface `ListableBeanFactory`
  Parameters:
    `type` - the class or interface to match, or `null` for all concrete beans
    `includeNonSingletons` - whether to include prototype or scoped beans too or just singletons (also applies to FactoryBeans)
    `allowEagerInit` - whether to initialize lazy-init singletons and objects created by FactoryBeans (or by factory methods with a "factory-bean" reference) for the type check. Note that FactoryBeans need to be eagerly initialized to determine their type: So be aware that passing in "true" for this flag will initialize FactoryBeans and "factory-bean" references.
  Returns:
    a Map with the matching beans, containing the bean names as keys and the corresponding bean instances as values
  Throws:
    `BeansException` - if a bean could not be created
  See Also:
    `FactoryBean.getObjectType()`, `BeanFactoryUtils.beansOfTypeIncludingAncestors(ListableBeanFactory, Class, boolean, boolean)`

### registerResolvableDependency

    public void registerResolvableDependency(Class dependencyType,
                                             Object autowiredValue)

  Description copied from interface: `ConfigurableListableBeanFactory`
  Register a special dependency type with corresponding autowired value.

  This is intended for factory/context references that are supposed to be autowirable but are not defined as beans in the factory: e.g. a dependency of type ApplicationContext resolved to the ApplicationContext instance that the bean is living in.

  Note: There are no such default types registered in a plain BeanFactory, not even for the BeanFactory interface itself.

  Specified by:
    `registerResolvableDependency` in interface `ConfigurableListableBeanFactory`
  Parameters:
    `dependencyType` - the dependency type to register. This will typically be a base interface such as BeanFactory, with extensions of it resolved as well if declared as an autowiring dependency (e.g. ListableBeanFactory), as long as the given value actually implements the extended interface.
    `autowiredValue` - the corresponding autowired value. This may also be an implementation of the `ObjectFactory` interface, which allows for lazy resolution of the actual target value.

### isAutowireCandidate

    public boolean isAutowireCandidate(String beanName,
                                       DependencyDescriptor descriptor)
                                throws NoSuchBeanDefinitionException

  Description copied from interface: `ConfigurableListableBeanFactory`
  Determine whether the specified bean qualifies as an autowire candidate, to be injected into other beans which declare a dependency of matching type.

  This method checks ancestor factories as well.

  Specified by:
    `isAutowireCandidate` in interface `ConfigurableListableBeanFactory`
  Parameters:
    `beanName` - the name of the bean to check
    `descriptor` - the descriptor of the dependency to resolve
  Returns:
    whether the bean should be considered as autowire candidate
  Throws:
    `NoSuchBeanDefinitionException` - if there is no bean with the given name

### isAutowireCandidate

    protected boolean isAutowireCandidate(String beanName,
                                          RootBeanDefinition mbd,
                                          DependencyDescriptor descriptor)

  Determine whether the specified bean definition qualifies as an autowire candidate, to be injected into other beans which declare a dependency of matching type.

  Parameters:
    `beanName` - the name of the bean definition to check
    `mbd` - the merged bean definition to check
    `descriptor` - the descriptor of the dependency to resolve
  Returns:
    whether the bean should be considered as autowire candidate

### getBeanDefinition

    public BeanDefinition getBeanDefinition(String beanName)
                                     throws NoSuchBeanDefinitionException

  Description copied from class: `AbstractBeanFactory`
  Return the bean definition for the given bean name. Subclasses should normally implement caching, as this method is invoked by this class every time bean definition metadata is needed.

  Depending on the nature of the concrete bean factory implementation, this operation might be expensive (for example, because of directory lookups in external registries). However, for listable bean factories, this usually just amounts to a local hash lookup: The operation is therefore part of the public interface there. The same implementation can serve for both this template method and the public interface method in that case.

  Specified by:
    `getBeanDefinition` in interface `ConfigurableListableBeanFactory`
  Specified by:
    `getBeanDefinition` in interface `BeanDefinitionRegistry`
  Specified by:
    `getBeanDefinition` in class `AbstractBeanFactory`
  Parameters:
    `beanName` - the name of the bean to find a definition for
  Returns:
    the BeanDefinition for this prototype name (never `null`)
  Throws:
    `NoSuchBeanDefinitionException` - if there is no bean with the given name defined in this factory
  See Also:
    `RootBeanDefinition`, `ChildBeanDefinition`, `ConfigurableListableBeanFactory.getBeanDefinition(java.lang.String)`

### freezeConfiguration

    public void freezeConfiguration()

  Description copied from interface: `ConfigurableListableBeanFactory`
  Freeze all bean definitions, signalling that the registered bean definitions will not be modified or post-processed any further.

  This allows the factory to aggressively cache bean definition metadata.

  Specified by:
    `freezeConfiguration` in interface `ConfigurableListableBeanFactory`

### isConfigurationFrozen

    public boolean isConfigurationFrozen()

  Description copied from interface: `ConfigurableListableBeanFactory`
  Return whether this factory's bean definitions are frozen, i.e. are not supposed to be modified or post-processed any further.

  Specified by:
    `isConfigurationFrozen` in interface `ConfigurableListableBeanFactory`
  Returns:
    `true` if the factory's configuration is considered frozen

### isBeanEligibleForMetadataCaching

    protected boolean isBeanEligibleForMetadataCaching(String beanName)

  Considers all beans as eligible for metdata caching if the factory's configuration has been marked as frozen.

  Overrides:
    `isBeanEligibleForMetadataCaching` in class `AbstractBeanFactory`
  Parameters:
    `beanName` - the name of the bean
  Returns:
    `true` if the bean's metadata may be cached at this point already
  See Also:
    `freezeConfiguration()`

### preInstantiateSingletons

    public void preInstantiateSingletons()
                                  throws BeansException

  Description copied from interface: `ConfigurableListableBeanFactory`
  Ensure that all non-lazy-init singletons are instantiated, also considering `FactoryBeans`. Typically invoked at the end of factory setup, if desired.

  Specified by:
    `preInstantiateSingletons` in interface `ConfigurableListableBeanFactory`
  Throws:
    `BeansException` - if one of the singleton beans could not be created. Note: This may have left the factory with some beans already initialized! Call `ConfigurableBeanFactory.destroySingletons()` for full cleanup in this case.
  See Also:
    `ConfigurableBeanFactory.destroySingletons()`

### registerBeanDefinition

    public void registerBeanDefinition(String beanName,
                                       BeanDefinition beanDefinition)
                                throws BeanDefinitionStoreException

  Description copied from interface: `BeanDefinitionRegistry`
  Register a new bean definition with this registry. Must support RootBeanDefinition and ChildBeanDefinition.

  Specified by:
    `registerBeanDefinition` in interface `BeanDefinitionRegistry`
  Parameters:
    `beanName` - the name of the bean instance to register
    `beanDefinition` - definition of the bean instance to register
  Throws:
    `BeanDefinitionStoreException` - if the BeanDefinition is invalid or if there is already a BeanDefinition for the specified bean name (and we are not allowed to override it)
  See Also:
    `RootBeanDefinition`, `ChildBeanDefinition`

### removeBeanDefinition

    public void removeBeanDefinition(String beanName)
                              throws NoSuchBeanDefinitionException

  Description copied from interface: `BeanDefinitionRegistry`
  Remove the BeanDefinition for the given name.

  Specified by:
    `removeBeanDefinition` in interface `BeanDefinitionRegistry`
  Parameters:
    `beanName` - the name of the bean instance to register
  Throws:
    `NoSuchBeanDefinitionException` - if there is no such bean definition

### resetBeanDefinition

    protected void resetBeanDefinition(String beanName)

  Reset all bean definition caches for the given bean, including the caches of beans that are derived from it.

  Parameters:
    `beanName` - the name of the bean to reset

### allowAliasOverriding

    protected boolean allowAliasOverriding()

  Only allows alias overriding if bean definition overriding is allowed.

  Overrides:
    `allowAliasOverriding` in class `SimpleAliasRegistry`

### resolveDependency

    public Object resolveDependency(DependencyDescriptor descriptor,
                                    String beanName,
                                    Set autowiredBeanNames,
                                    TypeConverter typeConverter)
                             throws BeansException

  Description copied from interface: `AutowireCapableBeanFactory`
  Resolve the specified dependency against the beans defined in this factory.

  Specified by:
    `resolveDependency` in interface `AutowireCapableBeanFactory`
  Parameters:
    `descriptor` - the descriptor for the dependency
    `beanName` - the name of the bean which declares the present dependency
    `autowiredBeanNames` - a Set that all names of autowired beans (used for resolving the present dependency) are supposed to be added to
    `typeConverter` - the TypeConverter to use for populating arrays and collections
  Returns:
    the resolved object, or `null` if none found
  Throws:
    `BeansException` - in dependency resolution failed

### findAutowireCandidates

    protected Map findAutowireCandidates(String beanName,
                                         Class requiredType,
                                         DependencyDescriptor descriptor)

  Find bean instances that match the required type. Called during autowiring for the specified bean.

  Parameters:
    `beanName` - the name of the bean that is about to be wired
    `requiredType` - the actual type of bean to look for (may be an array component type or collection element type)
    `descriptor` - the descriptor of the dependency to resolve
  Returns:
    a Map of candidate names and candidate instances that match the required type (never `null`)
  Throws:
    `BeansException` - in case of errors
  See Also:
    `AbstractAutowireCapableBeanFactory.autowireByType(java.lang.String, org.springframework.beans.factory.support.AbstractBeanDefinition, org.springframework.beans.BeanWrapper, org.springframework.beans.MutablePropertyValues)`, `AbstractAutowireCapableBeanFactory.autowireConstructor(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, java.lang.reflect.Constructor[], java.lang.Object[])`

### determinePrimaryCandidate

    protected String determinePrimaryCandidate(Map candidateBeans,
                                               Class type)

  Determine the primary autowire candidate in the given set of beans.

  Parameters:
    `candidateBeans` - a Map of candidate names and candidate instances that match the required type, as returned by `findAutowireCandidates(java.lang.String, java.lang.Class, org.springframework.beans.factory.config.DependencyDescriptor)`
    `type` - the required type
  Returns:
    the name of the primary candidate, or `null` if none found

### isPrimary

    protected boolean isPrimary(String beanName,
                                Object beanInstance)

  Return whether the bean definition for the given bean name has been marked as a primary bean.

  Parameters:
    `beanName` - the name of the bean
    `beanInstance` - the corresponding bean instance
  Returns:
    whether the given bean qualifies as primary

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

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