org.springframework.beans.factory.support
Class AbstractBeanFactory

java.lang.Object
  extended by org.springframework.core.SimpleAliasRegistry
      extended by org.springframework.beans.factory.support.DefaultSingletonBeanRegistry
          extended by org.springframework.beans.factory.support.FactoryBeanRegistrySupport
              extended by org.springframework.beans.factory.support.AbstractBeanFactory
All Implemented Interfaces:
BeanFactory, ConfigurableBeanFactory, SingletonBeanRegistry, HierarchicalBeanFactory, AliasRegistry
Direct Known Subclasses:
AbstractAutowireCapableBeanFactory

public abstract class AbstractBeanFactory
extends FactoryBeanRegistrySupport
implements ConfigurableBeanFactory

Abstract base class for BeanFactory implementations, providing the full capabilities of the ConfigurableBeanFactory SPI. Does not assume a listable bean factory: can therefore also be used as base class for bean factory implementations which obtain bean definitions from some backend resource (where bean definition access is an expensive operation).

This class provides a singleton cache (through its base class DefaultSingletonBeanRegistry, singleton/prototype determination, FactoryBean handling, aliases, bean definition merging for child bean definitions, and bean destruction (DisposableBean interface, custom destroy methods). Furthermore, it can manage a bean factory hierarchy (delegating to the parent in case of an unknown bean), through implementing the HierarchicalBeanFactory interface.

The main template methods to be implemented by subclasses are getBeanDefinition(java.lang.String) and createBean(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, java.lang.Object[]), retrieving a bean definition for a given bean name and creating a bean instance for a given bean definition, respectively. Default implementations of those operations can be found in DefaultListableBeanFactory and AbstractAutowireCapableBeanFactory.

Since:
15 April 2001
Author:
Rod Johnson, Juergen Hoeller
See Also:
getBeanDefinition(java.lang.String), createBean(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, java.lang.Object[]), AbstractAutowireCapableBeanFactory.createBean(java.lang.Class), DefaultListableBeanFactory.getBeanDefinition(java.lang.String)

Field Summary
 
Fields inherited from class org.springframework.beans.factory.support.DefaultSingletonBeanRegistry
logger, NULL_OBJECT
 
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
AbstractBeanFactory()
          Create a new AbstractBeanFactory.
AbstractBeanFactory(BeanFactory parentBeanFactory)
          Create a new AbstractBeanFactory with the given parent.
 
Method Summary
 void addBeanPostProcessor(BeanPostProcessor beanPostProcessor)
          Add a new BeanPostProcessor that will get applied to beans created by this factory.
 void addEmbeddedValueResolver(StringValueResolver valueResolver)
          Add a String resolver for embedded values such as annotation attributes.
 void addPropertyEditorRegistrar(PropertyEditorRegistrar registrar)
          Add a PropertyEditorRegistrar to be applied to all bean creation processes.
protected  void afterPrototypeCreation(java.lang.String beanName)
          Callback after prototype creation.
protected  void beforePrototypeCreation(java.lang.String beanName)
          Callback before prototype creation.
protected  void checkMergedBeanDefinition(RootBeanDefinition mbd, java.lang.String beanName, java.lang.Object[] args)
          Check the given merged bean definition, potentially throwing validation exceptions.
protected  void clearMergedBeanDefinition(java.lang.String beanName)
          Remove the merged bean definition for the specified bean, recreating it on next access.
 boolean containsBean(java.lang.String name)
          Does this bean factory contain a bean with the given name? More specifically, is BeanFactory.getBean(java.lang.String) able to obtain a bean instance for the given name?
protected abstract  boolean containsBeanDefinition(java.lang.String beanName)
          Check if this bean factory contains a bean definition with the given name.
 boolean containsLocalBean(java.lang.String name)
          Return whether the local bean factory contains a bean of the given name, ignoring beans defined in ancestor contexts.
 void copyConfigurationFrom(ConfigurableBeanFactory otherFactory)
          Copy all relevant configuration from the given other factory.
 void copyRegisteredEditorsTo(PropertyEditorRegistry registry)
          Initialize the given PropertyEditorRegistry with the custom editors that have been registered with this BeanFactory.
protected abstract  java.lang.Object createBean(java.lang.String beanName, RootBeanDefinition mbd, java.lang.Object[] args)
          Create a bean instance for the given bean definition.
 void destroyBean(java.lang.String beanName, java.lang.Object beanInstance)
          Destroy the given bean instance (usually a prototype instance obtained from this factory) according to its bean definition.
protected  void destroyBean(java.lang.String beanName, java.lang.Object beanInstance, RootBeanDefinition mbd)
          Destroy the given bean instance (usually a prototype instance obtained from this factory) according to the given bean definition.
 void destroyScopedBean(java.lang.String beanName)
          Destroy the specified scoped bean in the current target scope, if any.
protected
<T> T
doGetBean(java.lang.String name, java.lang.Class<T> requiredType, java.lang.Object[] args, boolean typeCheckOnly)
          Return an instance, which may be shared or independent, of the specified bean.
protected  java.lang.Object evaluateBeanDefinitionString(java.lang.String value, BeanDefinition beanDefinition)
          Evaluate the given String as contained in a bean definition, potentially resolving it as an expression.
 java.lang.String[] getAliases(java.lang.String name)
          Return the aliases for the given name, if defined.
 java.lang.Object getBean(java.lang.String name)
          Return an instance, which may be shared or independent, of the specified bean.
<T> T
getBean(java.lang.String name, java.lang.Class<T> requiredType)
          Return an instance, which may be shared or independent, of the specified bean.
<T> T
getBean(java.lang.String name, java.lang.Class<T> requiredType, java.lang.Object[] args)
          Return an instance, which may be shared or independent, of the specified bean.
 java.lang.Object getBean(java.lang.String name, java.lang.Object[] args)
          Return an instance, which may be shared or independent, of the specified bean.
 java.lang.ClassLoader getBeanClassLoader()
          Return this factory's class loader for loading bean classes.
protected abstract  BeanDefinition getBeanDefinition(java.lang.String beanName)
          Return the bean definition for the given bean name.
 BeanExpressionResolver getBeanExpressionResolver()
          Return the resolution strategy for expressions in bean definition values.
 int getBeanPostProcessorCount()
          Return the current number of registered BeanPostProcessors, if any.
 java.util.List<BeanPostProcessor> getBeanPostProcessors()
          Return the list of BeanPostProcessors that will get applied to beans created with this factory.
 java.util.Map<java.lang.Class,java.lang.Class<? extends java.beans.PropertyEditor>> getCustomEditors()
          Return the map of custom editors, with Classes as keys and PropertyEditor classes as values.
protected  TypeConverter getCustomTypeConverter()
          Return the custom TypeConverter to use, if any.
 BeanDefinition getMergedBeanDefinition(java.lang.String name)
          Return a 'merged' BeanDefinition for the given bean name, merging a child bean definition with its parent if necessary.
protected  RootBeanDefinition getMergedBeanDefinition(java.lang.String beanName, BeanDefinition bd)
          Return a RootBeanDefinition for the given top-level bean, by merging with the parent if the given bean's definition is a child bean definition.
protected  RootBeanDefinition getMergedBeanDefinition(java.lang.String beanName, BeanDefinition bd, BeanDefinition containingBd)
          Return a RootBeanDefinition for the given bean, by merging with the parent if the given bean's definition is a child bean definition.
protected  RootBeanDefinition getMergedLocalBeanDefinition(java.lang.String beanName)
          Return a merged RootBeanDefinition, traversing the parent bean definition if the specified bean corresponds to a child bean definition.
protected  java.lang.Object getObjectForBeanInstance(java.lang.Object beanInstance, java.lang.String name, java.lang.String beanName, RootBeanDefinition mbd)
          Get the object for the given bean instance, either the bean instance itself or its created object in case of a FactoryBean.
 BeanFactory getParentBeanFactory()
          Return the parent bean factory, or null if there is none.
 java.util.Set<PropertyEditorRegistrar> getPropertyEditorRegistrars()
          Return the set of PropertyEditorRegistrars.
 Scope getRegisteredScope(java.lang.String scopeName)
          Return the Scope implementation for the given scope name, if any.
 java.lang.String[] getRegisteredScopeNames()
          Return the names of all currently registered scopes.
 java.lang.ClassLoader getTempClassLoader()
          Return the temporary ClassLoader to use for type matching purposes, if any.
 java.lang.Class getType(java.lang.String name)
          Determine the type of the bean with the given name.
 TypeConverter getTypeConverter()
          Obtain a type converter as used by this BeanFactory.
protected  java.lang.Class getTypeForFactoryBean(java.lang.String beanName, RootBeanDefinition mbd)
          Determine the bean type for the given FactoryBean definition, as far as possible.
protected  boolean hasDestructionAwareBeanPostProcessors()
          Return whether this factory holds a DestructionAwareBeanPostProcessor that will get applied to singleton beans on shutdown.
protected  boolean hasInstantiationAwareBeanPostProcessors()
          Return whether this factory holds a InstantiationAwareBeanPostProcessor that will get applied to singleton beans on shutdown.
protected  void initBeanWrapper(BeanWrapper bw)
          Initialize the given BeanWrapper with the custom editors registered with this factory.
protected  boolean isBeanEligibleForMetadataCaching(java.lang.String beanName)
          Determine whether the specified bean is eligible for having its bean definition metadata cached.
 boolean isBeanNameInUse(java.lang.String beanName)
          Determine whether the given bean name is already in use within this factory, i.e.
 boolean isCacheBeanMetadata()
          Return whether to cache bean metadata such as given bean definitions (in merged fashion) and resolved bean classes.
 boolean isCurrentlyInCreation(java.lang.String beanName)
          Determine whether the specified bean is currently in creation.
 boolean isFactoryBean(java.lang.String name)
          Determine whether the bean with the given name is a FactoryBean.
protected  boolean isFactoryBean(java.lang.String beanName, RootBeanDefinition mbd)
          Check whether the given bean is defined as a FactoryBean.
 boolean isPrototype(java.lang.String name)
          Is this bean a prototype? That is, will BeanFactory.getBean(java.lang.String) always return independent instances?
protected  boolean isPrototypeCurrentlyInCreation(java.lang.String beanName)
          Return whether the specified prototype bean is currently in creation (within the current thread).
 boolean isSingleton(java.lang.String name)
          Is this bean a shared singleton? That is, will BeanFactory.getBean(java.lang.String) always return the same instance?
 boolean isTypeMatch(java.lang.String name, java.lang.Class targetType)
          Check whether the bean with the given name matches the specified type.
protected  void markBeanAsCreated(java.lang.String beanName)
          Mark the specified bean as already created (or about to be created).
protected  java.lang.String originalBeanName(java.lang.String name)
          Determine the original bean name, resolving locally defined aliases to canonical names.
protected  java.lang.Class predictBeanType(java.lang.String beanName, RootBeanDefinition mbd, java.lang.Class[] typesToMatch)
          Predict the eventual bean type (of the processed bean instance) for the specified bean.
 void registerCustomEditor(java.lang.Class requiredType, java.lang.Class<? extends java.beans.PropertyEditor> propertyEditorClass)
          Register the given custom property editor for all properties of the given type.
protected  void registerCustomEditors(PropertyEditorRegistry registry)
          Initialize the given PropertyEditorRegistry with the custom editors that have been registered with this BeanFactory.
protected  void registerDisposableBeanIfNecessary(java.lang.String beanName, java.lang.Object bean, RootBeanDefinition mbd)
          Add the given bean to the list of disposable beans in this factory, registering its DisposableBean interface and/or the given destroy method to be called on factory shutdown (if applicable).
 void registerScope(java.lang.String scopeName, Scope scope)
          Register the given scope, backed by the given Scope implementation.
protected  boolean removeSingletonIfCreatedForTypeCheckOnly(java.lang.String beanName)
          Remove the singleton instance (if any) for the given bean name, but only if it hasn't been used for other purposes than type checking.
protected  boolean requiresDestruction(java.lang.Object bean, RootBeanDefinition mbd)
          Determine whether the given bean requires destruction on shutdown.
protected  java.lang.Class resolveBeanClass(RootBeanDefinition mbd, java.lang.String beanName)
          Resolve the bean class for the specified bean definition, resolving a bean class name into a Class reference (if necessary) and storing the resolved Class in the bean definition for further use.
protected  java.lang.Class resolveBeanClass(RootBeanDefinition mbd, java.lang.String beanName, java.lang.Class[] typesToMatch)
          Resolve the bean class for the specified bean definition, resolving a bean class name into a Class reference (if necessary) and storing the resolved Class in the bean definition for further use.
 java.lang.String resolveEmbeddedValue(java.lang.String value)
          Resolve the given embedded value, e.g.
 void setBeanClassLoader(java.lang.ClassLoader beanClassLoader)
          Set the class loader to use for loading bean classes.
 void setBeanExpressionResolver(BeanExpressionResolver resolver)
          Specify the resolution strategy for expressions in bean definition values.
 void setCacheBeanMetadata(boolean cacheBeanMetadata)
          Set whether to cache bean metadata such as given bean definitions (in merged fashion) and resolved bean classes.
 void setParentBeanFactory(BeanFactory parentBeanFactory)
          Set the parent of this bean factory.
 void setTempClassLoader(java.lang.ClassLoader tempClassLoader)
          Specify a temporary ClassLoader to use for type matching purposes.
 void setTypeConverter(TypeConverter typeConverter)
          Set a custom type converter that this BeanFactory should use for converting bean property values, constructor argument values, etc.
protected  java.lang.String transformedBeanName(java.lang.String name)
          Return the bean name, stripping out the factory dereference prefix if necessary, and resolving aliases to canonical names.
 
Methods inherited from class org.springframework.beans.factory.support.FactoryBeanRegistrySupport
getCachedObjectForFactoryBean, getFactoryBean, getObjectFromFactoryBean, getTypeForFactoryBean, postProcessObjectFromFactoryBean, removeSingleton
 
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
allowAliasOverriding, canonicalName, isAlias, registerAlias, removeAlias, resolveAliases
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.springframework.beans.factory.config.ConfigurableBeanFactory
destroySingletons, getDependenciesForBean, getDependentBeans, registerAlias, registerDependentBean, resolveAliases
 
Methods inherited from interface org.springframework.beans.factory.config.SingletonBeanRegistry
containsSingleton, getSingleton, getSingletonCount, getSingletonNames, registerSingleton
 

Constructor Detail

AbstractBeanFactory

public AbstractBeanFactory()
Create a new AbstractBeanFactory.


AbstractBeanFactory

public AbstractBeanFactory(BeanFactory parentBeanFactory)
Create a new AbstractBeanFactory with the given parent.

Parameters:
parentBeanFactory - parent bean factory, or null if none
See Also:
getBean(java.lang.String)
Method Detail

getBean

public java.lang.Object getBean(java.lang.String name)
                         throws BeansException
Description copied from interface: BeanFactory
Return an instance, which may be shared or independent, of the specified bean.

This method allows a Spring BeanFactory to be used as a replacement for the Singleton or Prototype design pattern. Callers may retain references to returned objects in the case of Singleton beans.

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:
getBean in interface BeanFactory
Parameters:
name - the name of the bean to retrieve
Returns:
an instance of the bean
Throws:
NoSuchBeanDefinitionException - if there is no bean definition with the specified name
BeansException - if the bean could not be obtained

getBean

public <T> T getBean(java.lang.String name,
                     java.lang.Class<T> requiredType)
          throws BeansException
Description copied from interface: BeanFactory
Return an instance, which may be shared or independent, of the specified bean.

Behaves the same as BeanFactory.getBean(String), but provides a measure of type safety by throwing a BeanNotOfRequiredTypeException if the bean is not of the required type. This means that ClassCastException can't be thrown on casting the result correctly, as can happen with BeanFactory.getBean(String).

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:
getBean in interface BeanFactory
Parameters:
name - the name of the bean to retrieve
requiredType - type the bean must match. Can be an interface or superclass of the actual class, or null for any match. For example, if the value is Object.class, this method will succeed whatever the class of the returned instance.
Returns:
an instance of the bean
Throws:
NoSuchBeanDefinitionException - if there's no such bean definition
BeanNotOfRequiredTypeException - if the bean is not of the required type
BeansException - if the bean could not be created

getBean

public java.lang.Object getBean(java.lang.String name,
                                java.lang.Object[] args)
                         throws BeansException
Description copied from interface: BeanFactory
Return an instance, which may be shared or independent, of the specified bean.

Allows for specifying explicit constructor arguments / factory method arguments, overriding the specified default arguments (if any) in the bean definition.

Specified by:
getBean in interface BeanFactory
Parameters:
name - the name of the bean to retrieve
args - arguments to use if creating a prototype using explicit arguments to a static factory method. It is invalid to use a non-null args value in any other case.
Returns:
an instance of the bean
Throws:
NoSuchBeanDefinitionException - if there's no such bean definition
BeanDefinitionStoreException - if arguments have been given but the affected bean isn't a prototype
BeansException - if the bean could not be created

getBean

public <T> T getBean(java.lang.String name,
                     java.lang.Class<T> requiredType,
                     java.lang.Object[] args)
          throws BeansException
Return an instance, which may be shared or independent, of the specified bean.

Parameters:
name - the name of the bean to retrieve
requiredType - the required type of the bean to retrieve
args - arguments to use if creating a prototype using explicit arguments to a static factory method. It is invalid to use a non-null args value in any other case.
Returns:
an instance of the bean
Throws:
BeansException - if the bean could not be created

doGetBean

protected <T> T doGetBean(java.lang.String name,
                          java.lang.Class<T> requiredType,
                          java.lang.Object[] args,
                          boolean typeCheckOnly)
               throws BeansException
Return an instance, which may be shared or independent, of the specified bean.

Parameters:
name - the name of the bean to retrieve
requiredType - the required type of the bean to retrieve
args - arguments to use if creating a prototype using explicit arguments to a static factory method. It is invalid to use a non-null args value in any other case.
typeCheckOnly - whether the instance is obtained for a type check, not for actual use
Returns:
an instance of the bean
Throws:
BeansException - if the bean could not be created

containsBean

public boolean containsBean(java.lang.String name)
Description copied from interface: BeanFactory
Does this bean factory contain a bean with the given name? More specifically, is BeanFactory.getBean(java.lang.String) able to obtain a bean instance for the given name?

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:
containsBean in interface BeanFactory
Parameters:
name - the name of the bean to query
Returns:
whether a bean with the given name is defined

isSingleton

public boolean isSingleton(java.lang.String name)
                    throws NoSuchBeanDefinitionException
Description copied from interface: BeanFactory
Is this bean a shared singleton? That is, will BeanFactory.getBean(java.lang.String) always return the same instance?

Note: This method returning false does not clearly indicate independent instances. It indicates non-singleton instances, which may correspond to a scoped bean as well. Use the BeanFactory.isPrototype(java.lang.String) operation to explicitly check for independent instances.

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:
isSingleton in interface BeanFactory
Parameters:
name - the name of the bean to query
Returns:
whether this bean corresponds to a singleton instance
Throws:
NoSuchBeanDefinitionException - if there is no bean with the given name
See Also:
BeanFactory.getBean(java.lang.String), BeanFactory.isPrototype(java.lang.String)

isPrototype

public boolean isPrototype(java.lang.String name)
                    throws NoSuchBeanDefinitionException
Description copied from interface: BeanFactory
Is this bean a prototype? That is, will BeanFactory.getBean(java.lang.String) always return independent instances?

Note: This method returning false does not clearly indicate a singleton object. It indicates non-independent instances, which may correspond to a scoped bean as well. Use the BeanFactory.isSingleton(java.lang.String) operation to explicitly check for a shared singleton instance.

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:
isPrototype in interface BeanFactory
Parameters:
name - the name of the bean to query
Returns:
whether this bean will always deliver independent instances
Throws:
NoSuchBeanDefinitionException - if there is no bean with the given name
See Also:
BeanFactory.getBean(java.lang.String), BeanFactory.isSingleton(java.lang.String)

isTypeMatch

public boolean isTypeMatch(java.lang.String name,
                           java.lang.Class targetType)
                    throws NoSuchBeanDefinitionException
Description copied from interface: BeanFactory
Check whether the bean with the given name matches the specified type. More specifically, check whether a BeanFactory.getBean(java.lang.String) call for the given name would return an object that is assignable to the specified target type.

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:
isTypeMatch in interface BeanFactory
Parameters:
name - the name of the bean to query
targetType - the type to match against
Returns:
true if the bean type matches, false if it doesn't match or cannot be determined yet
Throws:
NoSuchBeanDefinitionException - if there is no bean with the given name
See Also:
BeanFactory.getBean(java.lang.String), BeanFactory.getType(java.lang.String)

getType

public java.lang.Class getType(java.lang.String name)
                        throws NoSuchBeanDefinitionException
Description copied from interface: BeanFactory
Determine the type of the bean with the given name. More specifically, determine the type of object that BeanFactory.getBean(java.lang.String) would return for the given name.

For a FactoryBean, return the type of object that the FactoryBean creates, as exposed by FactoryBean.getObjectType().

Translates aliases back to the corresponding canonical bean name. Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:
getType in interface BeanFactory
Parameters:
name - the name of the bean to query
Returns:
the type of the bean, or null if not determinable
Throws:
NoSuchBeanDefinitionException - if there is no bean with the given name
See Also:
BeanFactory.getBean(java.lang.String), BeanFactory.isTypeMatch(java.lang.String, java.lang.Class)

getAliases

public java.lang.String[] getAliases(java.lang.String name)
Description copied from interface: AliasRegistry
Return the aliases for the given name, if defined.

Specified by:
getAliases in interface BeanFactory
Specified by:
getAliases in interface AliasRegistry
Overrides:
getAliases in class SimpleAliasRegistry
Parameters:
name - the name to check for aliases
Returns:
the aliases, or an empty array if none
See Also:
BeanFactory.getBean(java.lang.String)

getParentBeanFactory

public BeanFactory getParentBeanFactory()
Description copied from interface: HierarchicalBeanFactory
Return the parent bean factory, or null if there is none.

Specified by:
getParentBeanFactory in interface HierarchicalBeanFactory

containsLocalBean

public boolean containsLocalBean(java.lang.String name)
Description copied from interface: HierarchicalBeanFactory
Return whether the local bean factory contains a bean of the given name, ignoring beans defined in ancestor contexts.

This is an alternative to containsBean, ignoring a bean of the given name from an ancestor bean factory.

Specified by:
containsLocalBean in interface HierarchicalBeanFactory
Parameters:
name - the name of the bean to query
Returns:
whether a bean with the given name is defined in the local factory
See Also:
BeanFactory.containsBean(java.lang.String)

setParentBeanFactory

public void setParentBeanFactory(BeanFactory parentBeanFactory)
Description copied from interface: ConfigurableBeanFactory
Set the parent of this bean factory.

Note that the parent cannot be changed: It should only be set outside a constructor if it isn't available at the time of factory instantiation.

Specified by:
setParentBeanFactory in interface ConfigurableBeanFactory
Parameters:
parentBeanFactory - the parent BeanFactory
See Also:
HierarchicalBeanFactory.getParentBeanFactory()

setBeanClassLoader

public void setBeanClassLoader(java.lang.ClassLoader beanClassLoader)
Description copied from interface: ConfigurableBeanFactory
Set the class loader to use for loading bean classes. Default is the thread context class loader.

Note that this class loader will only apply to bean definitions that do not carry a resolved bean class yet. This is the case as of Spring 2.0 by default: Bean definitions only carry bean class names, to be resolved once the factory processes the bean definition.

Specified by:
setBeanClassLoader in interface ConfigurableBeanFactory
Parameters:
beanClassLoader - the class loader to use, or null to suggest the default class loader

getBeanClassLoader

public java.lang.ClassLoader getBeanClassLoader()
Description copied from interface: ConfigurableBeanFactory
Return this factory's class loader for loading bean classes.

Specified by:
getBeanClassLoader in interface ConfigurableBeanFactory

setTempClassLoader

public void setTempClassLoader(java.lang.ClassLoader tempClassLoader)
Description copied from interface: ConfigurableBeanFactory
Specify a temporary ClassLoader to use for type matching purposes. Default is none, simply using the standard bean ClassLoader.

A temporary ClassLoader is usually just specified if load-time weaving is involved, to make sure that actual bean classes are loaded as lazily as possible. The temporary loader is then removed once the BeanFactory completes its bootstrap phase.

Specified by:
setTempClassLoader in interface ConfigurableBeanFactory

getTempClassLoader

public java.lang.ClassLoader getTempClassLoader()
Description copied from interface: ConfigurableBeanFactory
Return the temporary ClassLoader to use for type matching purposes, if any.

Specified by:
getTempClassLoader in interface ConfigurableBeanFactory

setCacheBeanMetadata

public void setCacheBeanMetadata(boolean cacheBeanMetadata)
Description copied from interface: ConfigurableBeanFactory
Set whether to cache bean metadata such as given bean definitions (in merged fashion) and resolved bean classes. Default is on.

Turn this flag off to enable hot-refreshing of bean definition objects and in particular bean classes. If this flag is off, any creation of a bean instance will re-query the bean class loader for newly resolved classes.

Specified by:
setCacheBeanMetadata in interface ConfigurableBeanFactory

isCacheBeanMetadata

public boolean isCacheBeanMetadata()
Description copied from interface: ConfigurableBeanFactory
Return whether to cache bean metadata such as given bean definitions (in merged fashion) and resolved bean classes.

Specified by:
isCacheBeanMetadata in interface ConfigurableBeanFactory

setBeanExpressionResolver

public void setBeanExpressionResolver(BeanExpressionResolver resolver)
Description copied from interface: ConfigurableBeanFactory
Specify the resolution strategy for expressions in bean definition values.

There is no expression support active in a BeanFactory by default. An ApplicationContext will typically set a standard expression strategy here, supporting "#{...}" expressions in a Unified EL compatible style.

Specified by:
setBeanExpressionResolver in interface ConfigurableBeanFactory

getBeanExpressionResolver

public BeanExpressionResolver getBeanExpressionResolver()
Description copied from interface: ConfigurableBeanFactory
Return the resolution strategy for expressions in bean definition values.

Specified by:
getBeanExpressionResolver in interface ConfigurableBeanFactory

addPropertyEditorRegistrar

public void addPropertyEditorRegistrar(PropertyEditorRegistrar registrar)
Description copied from interface: ConfigurableBeanFactory
Add a PropertyEditorRegistrar to be applied to all bean creation processes.

Such a registrar creates new PropertyEditor instances and registers them on the given registry, fresh for each bean creation attempt. This avoids the need for synchronization on custom editors; hence, it is generally preferable to use this method instead of ConfigurableBeanFactory.registerCustomEditor(java.lang.Class, java.lang.Class).

Specified by:
addPropertyEditorRegistrar in interface ConfigurableBeanFactory
Parameters:
registrar - the PropertyEditorRegistrar to register

getPropertyEditorRegistrars

public java.util.Set<PropertyEditorRegistrar> getPropertyEditorRegistrars()
Return the set of PropertyEditorRegistrars.


registerCustomEditor

public void registerCustomEditor(java.lang.Class requiredType,
                                 java.lang.Class<? extends java.beans.PropertyEditor> propertyEditorClass)
Description copied from interface: ConfigurableBeanFactory
Register the given custom property editor for all properties of the given type. To be invoked during factory configuration.

Note that this method will register a shared custom editor instance; access to that instance will be synchronized for thread-safety. It is generally preferable to use ConfigurableBeanFactory.addPropertyEditorRegistrar(org.springframework.beans.PropertyEditorRegistrar) instead of this method, to avoid for the need for synchronization on custom editors.

Specified by:
registerCustomEditor in interface ConfigurableBeanFactory
Parameters:
requiredType - type of the property
propertyEditorClass - the PropertyEditor class to register

copyRegisteredEditorsTo

public void copyRegisteredEditorsTo(PropertyEditorRegistry registry)
Description copied from interface: ConfigurableBeanFactory
Initialize the given PropertyEditorRegistry with the custom editors that have been registered with this BeanFactory.

Specified by:
copyRegisteredEditorsTo in interface ConfigurableBeanFactory
Parameters:
registry - the PropertyEditorRegistry to initialize

getCustomEditors

public java.util.Map<java.lang.Class,java.lang.Class<? extends java.beans.PropertyEditor>> getCustomEditors()
Return the map of custom editors, with Classes as keys and PropertyEditor classes as values.


setTypeConverter

public void setTypeConverter(TypeConverter typeConverter)
Description copied from interface: ConfigurableBeanFactory
Set a custom type converter that this BeanFactory should use for converting bean property values, constructor argument values, etc.

This will override the default PropertyEditor mechanism and hence make any custom editors or custom editor registrars irrelevant.

Specified by:
setTypeConverter in interface ConfigurableBeanFactory
See Also:
ConfigurableBeanFactory.addPropertyEditorRegistrar(org.springframework.beans.PropertyEditorRegistrar), ConfigurableBeanFactory.registerCustomEditor(java.lang.Class, java.lang.Class)

getCustomTypeConverter

protected TypeConverter getCustomTypeConverter()
Return the custom TypeConverter to use, if any.

Returns:
the custom TypeConverter, or null if none specified

getTypeConverter

public TypeConverter getTypeConverter()
Description copied from interface: ConfigurableBeanFactory
Obtain a type converter as used by this BeanFactory. This may be a fresh instance for each call, since TypeConverters are usually not thread-safe.

If the default PropertyEditor mechanism is active, the returned TypeConverter will be aware of all custom editors that have been registered.

Specified by:
getTypeConverter in interface ConfigurableBeanFactory

addEmbeddedValueResolver

public void addEmbeddedValueResolver(StringValueResolver valueResolver)
Description copied from interface: ConfigurableBeanFactory
Add a String resolver for embedded values such as annotation attributes.

Specified by:
addEmbeddedValueResolver in interface ConfigurableBeanFactory
Parameters:
valueResolver - the String resolver to apply to embedded values

resolveEmbeddedValue

public java.lang.String resolveEmbeddedValue(java.lang.String value)
Description copied from interface: ConfigurableBeanFactory
Resolve the given embedded value, e.g. an annotation attribute.

Specified by:
resolveEmbeddedValue in interface ConfigurableBeanFactory
Parameters:
value - the value to resolve
Returns:
the resolved value (may be the original value as-is)

addBeanPostProcessor

public void addBeanPostProcessor(BeanPostProcessor beanPostProcessor)
Description copied from interface: ConfigurableBeanFactory
Add a new BeanPostProcessor that will get applied to beans created by this factory. To be invoked during factory configuration.

Note: Post-processors submitted here will be applied in the order of registration; any ordering semantics expressed through implementing the Ordered interface will be ignored. Note that autodetected post-processors (e.g. as beans in an ApplicationContext) will always be applied after programmatically registered ones.

Specified by:
addBeanPostProcessor in interface ConfigurableBeanFactory
Parameters:
beanPostProcessor - the post-processor to register

getBeanPostProcessorCount

public int getBeanPostProcessorCount()
Description copied from interface: ConfigurableBeanFactory
Return the current number of registered BeanPostProcessors, if any.

Specified by:
getBeanPostProcessorCount in interface ConfigurableBeanFactory

getBeanPostProcessors

public java.util.List<BeanPostProcessor> getBeanPostProcessors()
Return the list of BeanPostProcessors that will get applied to beans created with this factory.


hasInstantiationAwareBeanPostProcessors

protected boolean hasInstantiationAwareBeanPostProcessors()
Return whether this factory holds a InstantiationAwareBeanPostProcessor that will get applied to singleton beans on shutdown.

See Also:
addBeanPostProcessor(org.springframework.beans.factory.config.BeanPostProcessor), InstantiationAwareBeanPostProcessor

hasDestructionAwareBeanPostProcessors

protected boolean hasDestructionAwareBeanPostProcessors()
Return whether this factory holds a DestructionAwareBeanPostProcessor that will get applied to singleton beans on shutdown.

See Also:
addBeanPostProcessor(org.springframework.beans.factory.config.BeanPostProcessor), DestructionAwareBeanPostProcessor

registerScope

public void registerScope(java.lang.String scopeName,
                          Scope scope)
Description copied from interface: ConfigurableBeanFactory
Register the given scope, backed by the given Scope implementation.

Specified by:
registerScope in interface ConfigurableBeanFactory
Parameters:
scopeName - the scope identifier
scope - the backing Scope implementation

getRegisteredScopeNames

public java.lang.String[] getRegisteredScopeNames()
Description copied from interface: ConfigurableBeanFactory
Return the names of all currently registered scopes.

This will only return the names of explicitly registered scopes. Built-in scopes such as "singleton" and "prototype" won't be exposed.

Specified by:
getRegisteredScopeNames in interface ConfigurableBeanFactory
Returns:
the array of scope names, or an empty array if none
See Also:
ConfigurableBeanFactory.registerScope(java.lang.String, org.springframework.beans.factory.config.Scope)

getRegisteredScope

public Scope getRegisteredScope(java.lang.String scopeName)
Description copied from interface: ConfigurableBeanFactory
Return the Scope implementation for the given scope name, if any.

This will only return explicitly registered scopes. Built-in scopes such as "singleton" and "prototype" won't be exposed.

Specified by:
getRegisteredScope in interface ConfigurableBeanFactory
Parameters:
scopeName - the name of the scope
Returns:
the registered Scope implementation, or null if none
See Also:
ConfigurableBeanFactory.registerScope(java.lang.String, org.springframework.beans.factory.config.Scope)

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
Parameters:
otherFactory - the other BeanFactory to copy from

getMergedBeanDefinition

public BeanDefinition getMergedBeanDefinition(java.lang.String name)
                                       throws BeansException
Return a 'merged' BeanDefinition for the given bean name, merging a child bean definition with its parent if necessary.

This getMergedBeanDefinition considers bean definition in ancestors as well.

Specified by:
getMergedBeanDefinition in interface ConfigurableBeanFactory
Parameters:
name - the name of the bean to retrieve the merged definition for (may be an alias)
Returns:
a (potentially merged) RootBeanDefinition for the given bean
Throws:
NoSuchBeanDefinitionException - if there is no bean with the given name
BeanDefinitionStoreException - in case of an invalid bean definition
BeansException

isFactoryBean

public boolean isFactoryBean(java.lang.String name)
                      throws NoSuchBeanDefinitionException
Description copied from interface: ConfigurableBeanFactory
Determine whether the bean with the given name is a FactoryBean.

Specified by:
isFactoryBean in interface ConfigurableBeanFactory
Parameters:
name - the name of the bean to check
Returns:
whether the bean is a FactoryBean (false means the bean exists but is not a FactoryBean)
Throws:
NoSuchBeanDefinitionException - if there is no bean with the given name

beforePrototypeCreation

protected void beforePrototypeCreation(java.lang.String beanName)
Callback before prototype creation.

The default implementation register the prototype as currently in creation.

Parameters:
beanName - the name of the prototype about to be created
See Also:
isPrototypeCurrentlyInCreation(java.lang.String)

afterPrototypeCreation

protected void afterPrototypeCreation(java.lang.String beanName)
Callback after prototype creation.

The default implementation marks the prototype as not in creation anymore.

Parameters:
beanName - the name of the prototype that has been created
See Also:
isPrototypeCurrentlyInCreation(java.lang.String)

isPrototypeCurrentlyInCreation

protected final boolean isPrototypeCurrentlyInCreation(java.lang.String beanName)
Return whether the specified prototype bean is currently in creation (within the current thread).

Parameters:
beanName - the name of the bean

isCurrentlyInCreation

public boolean isCurrentlyInCreation(java.lang.String beanName)
Description copied from interface: ConfigurableBeanFactory
Determine whether the specified bean is currently in creation.

Specified by:
isCurrentlyInCreation in interface ConfigurableBeanFactory
Parameters:
beanName - the name of the bean
Returns:
whether the bean is currently in creation

destroyBean

public void destroyBean(java.lang.String beanName,
                        java.lang.Object beanInstance)
Description copied from interface: ConfigurableBeanFactory
Destroy the given bean instance (usually a prototype instance obtained from this factory) according to its bean definition.

Any exception that arises during destruction should be caught and logged instead of propagated to the caller of this method.

Specified by:
destroyBean in interface ConfigurableBeanFactory
Parameters:
beanName - the name of the bean definition
beanInstance - the bean instance to destroy

destroyBean

protected void destroyBean(java.lang.String beanName,
                           java.lang.Object beanInstance,
                           RootBeanDefinition mbd)
Destroy the given bean instance (usually a prototype instance obtained from this factory) according to the given bean definition.

Parameters:
beanName - the name of the bean definition
beanInstance - the bean instance to destroy
mbd - the merged bean definition

destroyScopedBean

public void destroyScopedBean(java.lang.String beanName)
Description copied from interface: ConfigurableBeanFactory
Destroy the specified scoped bean in the current target scope, if any.

Any exception that arises during destruction should be caught and logged instead of propagated to the caller of this method.

Specified by:
destroyScopedBean in interface ConfigurableBeanFactory
Parameters:
beanName - the name of the scoped bean

transformedBeanName

protected java.lang.String transformedBeanName(java.lang.String name)
Return the bean name, stripping out the factory dereference prefix if necessary, and resolving aliases to canonical names.

Parameters:
name - the user-specified name
Returns:
the transformed bean name

originalBeanName

protected java.lang.String originalBeanName(java.lang.String name)
Determine the original bean name, resolving locally defined aliases to canonical names.

Parameters:
name - the user-specified name
Returns:
the original bean name

initBeanWrapper

protected void initBeanWrapper(BeanWrapper bw)
Initialize the given BeanWrapper with the custom editors registered with this factory. To be called for BeanWrappers that will create and populate bean instances.

The default implementation delegates to registerCustomEditors(org.springframework.beans.PropertyEditorRegistry). Can be overridden in subclasses.

Parameters:
bw - the BeanWrapper to initialize

registerCustomEditors

protected void registerCustomEditors(PropertyEditorRegistry registry)
Initialize the given PropertyEditorRegistry with the custom editors that have been registered with this BeanFactory.

To be called for BeanWrappers that will create and populate bean instances, and for SimpleTypeConverter used for constructor argument and factory method type conversion.

Parameters:
registry - the PropertyEditorRegistry to initialize

getMergedLocalBeanDefinition

protected RootBeanDefinition getMergedLocalBeanDefinition(java.lang.String beanName)
                                                   throws BeansException
Return a merged RootBeanDefinition, traversing the parent bean definition if the specified bean corresponds to a child bean definition.

Parameters:
beanName - the name of the bean to retrieve the merged definition for
Returns:
a (potentially merged) RootBeanDefinition for the given bean
Throws:
NoSuchBeanDefinitionException - if there is no bean with the given name
BeanDefinitionStoreException - in case of an invalid bean definition
BeansException

getMergedBeanDefinition

protected RootBeanDefinition getMergedBeanDefinition(java.lang.String beanName,
                                                     BeanDefinition bd)
                                              throws BeanDefinitionStoreException
Return a RootBeanDefinition for the given top-level bean, by merging with the parent if the given bean's definition is a child bean definition.

Parameters:
beanName - the name of the bean definition
bd - the original bean definition (Root/ChildBeanDefinition)
Returns:
a (potentially merged) RootBeanDefinition for the given bean
Throws:
BeanDefinitionStoreException - in case of an invalid bean definition

getMergedBeanDefinition

protected RootBeanDefinition getMergedBeanDefinition(java.lang.String beanName,
                                                     BeanDefinition bd,
                                                     BeanDefinition containingBd)
                                              throws BeanDefinitionStoreException
Return a RootBeanDefinition for the given bean, by merging with the parent if the given bean's definition is a child bean definition.

Parameters:
beanName - the name of the bean definition
bd - the original bean definition (Root/ChildBeanDefinition)
containingBd - the containing bean definition in case of inner bean, or null in case of a top-level bean
Returns:
a (potentially merged) RootBeanDefinition for the given bean
Throws:
BeanDefinitionStoreException - in case of an invalid bean definition

checkMergedBeanDefinition

protected void checkMergedBeanDefinition(RootBeanDefinition mbd,
                                         java.lang.String beanName,
                                         java.lang.Object[] args)
                                  throws BeanDefinitionStoreException
Check the given merged bean definition, potentially throwing validation exceptions.

Parameters:
mbd - the merged bean definition to check
beanName - the name of the bean
args - the arguments for bean creation, if any
Throws:
BeanDefinitionStoreException - in case of validation failure

clearMergedBeanDefinition

protected void clearMergedBeanDefinition(java.lang.String beanName)
Remove the merged bean definition for the specified bean, recreating it on next access.

Parameters:
beanName - the bean name to clear the merged definition for

resolveBeanClass

protected java.lang.Class resolveBeanClass(RootBeanDefinition mbd,
                                           java.lang.String beanName)
Resolve the bean class for the specified bean definition, resolving a bean class name into a Class reference (if necessary) and storing the resolved Class in the bean definition for further use.

Parameters:
mbd - the merged bean definition to determine the class for
beanName - the name of the bean (for error handling purposes)
Returns:
the resolved bean class (or null if none)
Throws:
CannotLoadBeanClassException - if we failed to load the class

resolveBeanClass

protected java.lang.Class resolveBeanClass(RootBeanDefinition mbd,
                                           java.lang.String beanName,
                                           java.lang.Class[] typesToMatch)
                                    throws CannotLoadBeanClassException
Resolve the bean class for the specified bean definition, resolving a bean class name into a Class reference (if necessary) and storing the resolved Class in the bean definition for further use.

Parameters:
mbd - the merged bean definition to determine the class for
beanName - the name of the bean (for error handling purposes)
typesToMatch - the types to match in case of internal type matching purposes (also signals that the returned Class will never be exposed to application code)
Returns:
the resolved bean class (or null if none)
Throws:
CannotLoadBeanClassException - if we failed to load the class

evaluateBeanDefinitionString

protected java.lang.Object evaluateBeanDefinitionString(java.lang.String value,
                                                        BeanDefinition beanDefinition)
Evaluate the given String as contained in a bean definition, potentially resolving it as an expression.

Parameters:
value - the value to check
beanDefinition - the bean definition that the value comes from
Returns:
the resolved value
See Also:
setBeanExpressionResolver(org.springframework.beans.factory.config.BeanExpressionResolver)

predictBeanType

protected java.lang.Class predictBeanType(java.lang.String beanName,
                                          RootBeanDefinition mbd,
                                          java.lang.Class[] typesToMatch)
Predict the eventual bean type (of the processed bean instance) for the specified bean. Called by getType(java.lang.String) and isTypeMatch(java.lang.String, java.lang.Class). Does not need to handle FactoryBeans specifically, since it is only supposed to operate on the raw bean type.

This implementation is simplistic in that it is not able to handle factory methods and InstantiationAwareBeanPostProcessors. It only predicts the bean type correctly for a standard bean. To be overridden in subclasses, applying more sophisticated type detection.

Parameters:
beanName - the name of the bean
mbd - the merged bean definition to determine the type for
typesToMatch - the types to match in case of internal type matching purposes (also signals that the returned Class will never be exposed to application code)
Returns:
the type of the bean, or null if not predictable

isFactoryBean

protected boolean isFactoryBean(java.lang.String beanName,
                                RootBeanDefinition mbd)
Check whether the given bean is defined as a FactoryBean.

Parameters:
beanName - the name of the bean
mbd - the corresponding bean definition

getTypeForFactoryBean

protected java.lang.Class getTypeForFactoryBean(java.lang.String beanName,
                                                RootBeanDefinition mbd)
Determine the bean type for the given FactoryBean definition, as far as possible. Only called if there is no singleton instance registered for the target bean already.

The default implementation creates the FactoryBean via getBean to call its getObjectType method. Subclasses are encouraged to optimize this, typically by just instantiating the FactoryBean but not populating it yet, trying whether its getObjectType method already returns a type. If no type found, a full FactoryBean creation as performed by this implementation should be used as fallback.

Parameters:
beanName - the name of the bean
mbd - the merged bean definition for the bean
Returns:
the type for the bean if determinable, or null else
See Also:
FactoryBean.getObjectType(), getBean(String)

markBeanAsCreated

protected void markBeanAsCreated(java.lang.String beanName)
Mark the specified bean as already created (or about to be created).

This allows the bean factory to optimize its caching for repeated creation of the specified bean.

Parameters:
beanName - the name of the bean

isBeanEligibleForMetadataCaching

protected boolean isBeanEligibleForMetadataCaching(java.lang.String beanName)
Determine whether the specified bean is eligible for having its bean definition metadata cached.

Parameters:
beanName - the name of the bean
Returns:
true if the bean's metadata may be cached at this point already

removeSingletonIfCreatedForTypeCheckOnly

protected boolean removeSingletonIfCreatedForTypeCheckOnly(java.lang.String beanName)
Remove the singleton instance (if any) for the given bean name, but only if it hasn't been used for other purposes than type checking.

Parameters:
beanName - the name of the bean
Returns:
true if actually removed, false otherwise

getObjectForBeanInstance

protected java.lang.Object getObjectForBeanInstance(java.lang.Object beanInstance,
                                                    java.lang.String name,
                                                    java.lang.String beanName,
                                                    RootBeanDefinition mbd)
Get the object for the given bean instance, either the bean instance itself or its created object in case of a FactoryBean.

Parameters:
beanInstance - the shared bean instance
name - name that may include factory dereference prefix
beanName - the canonical bean name
mbd - the merged bean definition
Returns:
the object to expose for the bean

isBeanNameInUse

public boolean isBeanNameInUse(java.lang.String beanName)
Determine whether the given bean name is already in use within this factory, i.e. whether there is a local bean or alias registered under this name or an inner bean created with this name.

Parameters:
beanName - the name to check

requiresDestruction

protected boolean requiresDestruction(java.lang.Object bean,
                                      RootBeanDefinition mbd)
Determine whether the given bean requires destruction on shutdown.

The default implementation checks the DisposableBean interface as well as a specified destroy method and registered DestructionAwareBeanPostProcessors.

Parameters:
bean - the bean instance to check
mbd - the corresponding bean definition
See Also:
DisposableBean, AbstractBeanDefinition.getDestroyMethodName(), DestructionAwareBeanPostProcessor

registerDisposableBeanIfNecessary

protected void registerDisposableBeanIfNecessary(java.lang.String beanName,
                                                 java.lang.Object bean,
                                                 RootBeanDefinition mbd)
Add the given bean to the list of disposable beans in this factory, registering its DisposableBean interface and/or the given destroy method to be called on factory shutdown (if applicable). Only applies to singletons.

Parameters:
beanName - the name of the bean
bean - the bean instance
mbd - the bean definition for the bean
See Also:
AbstractBeanDefinition.isSingleton(), AbstractBeanDefinition.getDependsOn(), DefaultSingletonBeanRegistry.registerDisposableBean(java.lang.String, org.springframework.beans.factory.DisposableBean), DefaultSingletonBeanRegistry.registerDependentBean(java.lang.String, java.lang.String)

containsBeanDefinition

protected abstract boolean containsBeanDefinition(java.lang.String beanName)
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.

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:
containsBean(java.lang.String), ListableBeanFactory.containsBeanDefinition(java.lang.String)

getBeanDefinition

protected abstract BeanDefinition getBeanDefinition(java.lang.String beanName)
                                             throws BeansException
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.

Parameters:
beanName - the name of the bean to find a definition for
Returns:
the BeanDefinition for this prototype name (never null)
Throws:
NoSuchBeanDefinitionException - if the bean definition cannot be resolved
BeansException - in case of errors
See Also:
RootBeanDefinition, ChildBeanDefinition, ConfigurableListableBeanFactory.getBeanDefinition(java.lang.String)

createBean

protected abstract java.lang.Object createBean(java.lang.String beanName,
                                               RootBeanDefinition mbd,
                                               java.lang.Object[] args)
                                        throws BeanCreationException
Create a bean instance for the given bean definition. The bean definition will already have been merged with the parent definition in case of a child definition.

All the other methods in this class invoke this method, although beans may be cached after being instantiated by this method. All bean instantiation within this class is performed by this method.

Parameters:
beanName - the name of the bean
mbd - the merged bean definition for the bean
args - arguments to use if creating a prototype using explicit arguments to a static factory method. This parameter must be null except in this case.
Returns:
a new instance of the bean
Throws:
BeanCreationException - if the bean could not be created