org.springframework.beans.factory.support
Class AbstractAutowireCapableBeanFactory

java.lang.Object
  org.springframework.beans.factory.support.DefaultSingletonBeanRegistry
      org.springframework.beans.factory.support.AbstractBeanFactory
          org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory

All Implemented Interfaces:

BeanFactory, AutowireCapableBeanFactory, ConfigurableBeanFactory, SingletonBeanRegistry, HierarchicalBeanFactory

Direct Known Subclasses:

DefaultListableBeanFactory

public abstract class AbstractAutowireCapableBeanFactory
extends AbstractBeanFactory
implements AutowireCapableBeanFactory

Abstract bean factory superclass that implements default bean creation, with the full capabilities specified by the RootBeanDefinition class. Implements the AutowireCapableBeanFactory interface in addition to AbstractBeanFactory's createBean(java.lang.Class, int, boolean) method.

Provides bean creation (with constructor resolution), property population, wiring (including autowiring), and initialization. Handles runtime bean references, resolves managed collections, calls initialization methods, etc. Supports autowiring constructors, properties by name, and properties by type.

The main template method to be implemented by subclasses is findAutowireCandidates(java.lang.String, java.lang.Class), used for autowiring by type. In case of a factory which is capable of searching its bean definitions, matching beans will typically be implemented through such a search. For other factory styles, simplified matching algorithms can be implemented.

Note that this class does not assume or implement bean definition registry capabilities. See DefaultListableBeanFactory for an implementation of the ListableBeanFactory and BeanDefinitionRegistry interfaces, which represent the API and SPI view of such a factory, respectively.

Since:

13.02.2004

Author:

Rod Johnson, Juergen Hoeller, Rob Harrop

See Also:

RootBeanDefinition, DefaultListableBeanFactory, BeanDefinitionRegistry

Field Summary

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

logger

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.BeanFactory

FACTORY_BEAN_PREFIX

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

SCOPE_PROTOTYPE, SCOPE_SINGLETON

Constructor Summary

AbstractAutowireCapableBeanFactory()
Create a new AbstractAutowireCapableBeanFactory.

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

Method Summary

Object	applyBeanPostProcessorsAfterInitialization(Object existingBean, String beanName) Apply BeanPostProcessors to the given existing bean instance, invoking their postProcessAfterInitialization methods.
Object	applyBeanPostProcessorsBeforeInitialization(Object existingBean, String beanName) Apply BeanPostProcessors to the given existing bean instance, invoking their postProcessBeforeInitialization methods.
protected Object	applyBeanPostProcessorsBeforeInstantiation(Class beanClass, String beanName) Apply InstantiationAwareBeanPostProcessors to the specified bean definition (by class and name), invoking their postProcessBeforeInstantiation methods.
void	applyBeanPropertyValues(Object existingBean, String beanName) Apply the property values of the bean definition with the given name to the given bean instance.
protected void	applyPropertyValues(String beanName, RootBeanDefinition mbd, BeanWrapper bw, PropertyValues pvs) Apply the given property values, resolving any runtime references to other beans in this bean factory.
Object	autowire(Class beanClass, int autowireMode, boolean dependencyCheck) Instantiate a new bean instance of the given class with the specified autowire strategy.
void	autowireBeanProperties(Object existingBean, int autowireMode, boolean dependencyCheck) Autowire the bean properties of the given bean instance by name or type.
protected void	autowireByName(String beanName, RootBeanDefinition mbd, BeanWrapper bw, MutablePropertyValues pvs) Fill in any missing property values with references to other beans in this factory if autowire is set to "byName".
protected void	autowireByType(String beanName, RootBeanDefinition mbd, BeanWrapper bw, MutablePropertyValues pvs) Abstract method defining "autowire by type" (bean properties by type) behavior.
protected BeanWrapper	autowireConstructor(String beanName, RootBeanDefinition mbd, Constructor ctor) "autowire constructor" (with constructor arguments by type) behavior.
protected void	checkDependencies(String beanName, RootBeanDefinition mbd, PropertyDescriptor[] pds, PropertyValues pvs) Perform a dependency check that all properties exposed have been set, if desired.
Object	configureBean(Object existingBean, String beanName) Configure the given bean instance: autowiring bean properties, applying bean property values, applying factory callbacks such as setBeanName and setBeanFactory, and also applying all bean post processors.
void	copyConfigurationFrom(ConfigurableBeanFactory otherFactory) Copy all relevant configuration from the given other factory.
Object	createBean(Class beanClass, int autowireMode, boolean dependencyCheck) Fully create a new bean instance of the given class with the specified autowire strategy.
protected Object	createBean(String beanName, RootBeanDefinition mbd, Object[] args) Central method of this class: creates a bean instance, populates the bean instance, applies post-processors, etc.
protected BeanWrapper	createBeanInstance(String beanName, RootBeanDefinition mbd, Object[] args) Create a new instance for the specified bean, using an appropriate instantiation strategy: factory method, constructor autowiring, or simple instantiation.
protected Constructor	determineConstructorFromBeanPostProcessors(Class beanClass, String beanName) Determine the constructor to use for the given bean, checking all registered SmartInstantiationAwareBeanPostProcessors.
protected PropertyDescriptor[]	filterPropertyDescriptorsForDependencyCheck(BeanWrapper bw) Extract a filtered set of PropertyDescriptors from the given BeanWrapper, excluding ignored dependency types or properties defined on ignored dependency interfaces.
protected Map	findAutowireCandidates(String beanName, Class requiredType) Find bean instances that match the required type.
protected Map	findMatchingBeans(Class requiredType) Deprecated. as of Spring 2.0.1: Override findAutowireCandidates instead
protected InstantiationStrategy	getInstantiationStrategy() Return the instantiation strategy to use for creating bean instances.
protected Class	getTypeForFactoryBean(String beanName, RootBeanDefinition mbd) This implementation checks the FactoryBean's getObjectType method on a plain instance of the FactoryBean, without bean properties applied yet.
protected Class	getTypeForFactoryMethod(String beanName, RootBeanDefinition mbd) Determine the bean type for the given bean definition which is based on a factory method.
void	ignoreDependencyInterface(Class ifc) Ignore the given dependency interface for autowiring.
void	ignoreDependencyType(Class type) Ignore the given dependency type for autowiring: for example, String.
Object	initializeBean(Object existingBean, String beanName) Initialize the given bean instance, applying factory callbacks such as setBeanName and setBeanFactory, also applying all bean post processors.
protected Object	initializeBean(String beanName, Object bean, RootBeanDefinition mbd) Initialize the given bean instance, applying factory callbacks as well as init methods and bean post processors.
protected BeanWrapper	instantiateBean(String beanName, RootBeanDefinition mbd) Instantiate the given bean using its default constructor.
protected BeanWrapper	instantiateUsingFactoryMethod(String beanName, RootBeanDefinition mbd, Object[] explicitArgs) Instantiate the bean using a named factory method.
protected void	invokeCustomInitMethod(String beanName, Object bean, String initMethodName, boolean enforceInitMethod) Invoke the specified custom init method on the given bean.
protected void	invokeInitMethods(String beanName, Object bean, RootBeanDefinition mbd) Give a bean a chance to react now all its properties are set, and a chance to know about its owning bean factory (this object).
protected boolean	isExcludedFromDependencyCheck(PropertyDescriptor pd) Determine whether the given bean property is excluded from dependency checks.
protected void	populateBean(String beanName, RootBeanDefinition mbd, BeanWrapper bw) Populate the bean instance in the given BeanWrapper with the property values from the bean definition.
protected Object	postProcessObjectFromFactoryBean(Object object, String beanName) Applies the postProcessAfterInitialization callback of all registered BeanPostProcessors, giving them a chance to post-process the object obtained from FactoryBeans (for example, to auto-proxy them).
protected Class	predictBeanType(String beanName, RootBeanDefinition mbd) Predict the eventual bean type for the given bean.
protected void	removeSingleton(String beanName) Overridden to clear FactoryBean instance cache as well.
void	setAllowCircularReferences(boolean allowCircularReferences) Set whether to allow circular references between beans - and automatically try to resolve them.
void	setAllowRawInjectionDespiteWrapping(boolean allowRawInjectionDespiteWrapping) Set whether to allow the raw injection of a bean instance into some other bean's property, despite the injected bean eventually getting wrapped (for example, through AOP auto-proxying).
void	setInstantiationStrategy(InstantiationStrategy instantiationStrategy) Set the instantiation strategy to use for creating bean instances.
protected String[]	unsatisfiedNonSimpleProperties(RootBeanDefinition mbd, BeanWrapper bw) Return an array of non-simple bean properties that are unsatisfied.

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

addBeanPostProcessor, addPropertyEditorRegistrar, afterPrototypeCreation, beforePrototypeCreation, checkMergedBeanDefinition, clearMergedBeanDefinition, containsBean, containsBeanDefinition, containsLocalBean, destroyBean, destroyBean, destroyScopedBean, getAliases, getBean, getBean, getBean, getBean, getBeanClassLoader, getBeanDefinition, getBeanPostProcessorCount, getBeanPostProcessors, getCustomEditors, getMergedBeanDefinition, getMergedBeanDefinition, getMergedBeanDefinition, getMergedBeanDefinition, getObjectForBeanInstance, getObjectFromFactoryBean, getParentBeanFactory, getPropertyEditorRegistrars, getRegisteredScope, getRegisteredScopeNames, getType, getTypeConverter, getTypeForFactoryBean, hasDestructionAwareBeanPostProcessors, hasInstantiationAwareBeanPostProcessors, initBeanWrapper, isAlias, isBeanClassMatch, isBeanNameInUse, isCacheBeanMetadata, isCurrentlyInCreation, isFactoryBean, isPrototype, isPrototypeCurrentlyInCreation, isSingleton, isTypeMatch, originalBeanName, registerAlias, registerCustomEditor, registerCustomEditors, registerDisposableBeanIfNecessary, registerScope, requiresDestruction, resolveBeanClass, setBeanClassLoader, setCacheBeanMetadata, setParentBeanFactory, transformedBeanName

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

addSingleton, afterSingletonCreation, beforeSingletonCreation, containsSingleton, destroyBean, destroySingleton, destroySingletons, getDependentBeans, getSingleton, getSingleton, getSingletonCount, getSingletonMutex, getSingletonNames, hasDependentBean, isSingletonCurrentlyInCreation, registerDependentBean, registerDisposableBean, registerSingleton

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.BeanFactory

containsBean, getAliases, getBean, getBean, getType, isPrototype, isSingleton, isTypeMatch

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

destroySingletons

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

containsSingleton, getSingleton, getSingletonCount, getSingletonNames, registerSingleton

Constructor Detail

AbstractAutowireCapableBeanFactory

public AbstractAutowireCapableBeanFactory()

Create a new AbstractAutowireCapableBeanFactory.

AbstractAutowireCapableBeanFactory

public AbstractAutowireCapableBeanFactory(BeanFactory parentBeanFactory)

Create a new AbstractAutowireCapableBeanFactory with the given parent.

Parameters:

parentBeanFactory - parent bean factory, or null if none

Method Detail

setInstantiationStrategy

public void setInstantiationStrategy(InstantiationStrategy instantiationStrategy)

Set the instantiation strategy to use for creating bean instances. Default is CglibSubclassingInstantiationStrategy.

See Also:

CglibSubclassingInstantiationStrategy

getInstantiationStrategy

protected InstantiationStrategy getInstantiationStrategy()

Return the instantiation strategy to use for creating bean instances.

setAllowCircularReferences

public void setAllowCircularReferences(boolean allowCircularReferences)

Set whether to allow circular references between beans - and automatically try to resolve them.

Note that circular reference resolution means that one of the involved beans will receive a reference to another bean that is not fully initialized yet. This can lead to subtle and not-so-subtle side effects on initialization; it does work fine for many scenarios, though.

Default is "true". Turn this off to throw an exception when encountering a circular reference, disallowing them completely.

NOTE: It is generally recommended to not rely on circular references between your beans. Refactor your application logic to have the two beans involved delegate to a third bean that encapsulates their common logic.

setAllowRawInjectionDespiteWrapping

public void setAllowRawInjectionDespiteWrapping(boolean allowRawInjectionDespiteWrapping)

Set whether to allow the raw injection of a bean instance into some other bean's property, despite the injected bean eventually getting wrapped (for example, through AOP auto-proxying).

This will only be used as a last resort in case of a circular reference that cannot be resolved otherwise: essentially, preferring a raw instance getting injected over a failure of the entire bean wiring process.

Default is "false", as of Spring 2.0. Turn this on to allow for non-wrapped raw beans injected into some of your references, which was Spring 1.2's (arguably unclean) default behavior.

NOTE: It is generally recommended to not rely on circular references between your beans, in particular with auto-proxying involved.

See Also:

setAllowCircularReferences(boolean)

ignoreDependencyType

public void ignoreDependencyType(Class type)

Ignore the given dependency type for autowiring: for example, String. Default is none.

ignoreDependencyInterface

public void ignoreDependencyInterface(Class ifc)

Ignore the given dependency interface for autowiring.

This will typically be used by application contexts to register dependencies that are resolved in other ways, like BeanFactory through BeanFactoryAware or ApplicationContext through ApplicationContextAware.

By default, only the BeanFactoryAware interface is ignored. For further types to ignore, invoke this method for each type.

See Also:

BeanFactoryAware, ApplicationContextAware

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 AbstractBeanFactory

Parameters:

otherFactory - the other BeanFactory to copy from

createBean

public Object createBean(Class beanClass,
                         int autowireMode,
                         boolean dependencyCheck)
                  throws BeansException

Description copied from interface: AutowireCapableBeanFactory

Fully create a new bean instance of the given class with the specified autowire strategy. All constants defined in this interface are supported here.

Performs full initialization of the bean, including all applicable BeanPostProcessors.

Specified by:

createBean in interface AutowireCapableBeanFactory

Parameters:

beanClass - the class of the bean to create

autowireMode - by name or type, using the constants in this interface

dependencyCheck - whether to perform a dependency check for objects (not applicable to autowiring a constructor, thus ignored there)

Returns:

the new bean instance

Throws:

BeansException - if instantiation or wiring failed

See Also:

AutowireCapableBeanFactory.AUTOWIRE_NO, AutowireCapableBeanFactory.AUTOWIRE_BY_NAME, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, AutowireCapableBeanFactory.AUTOWIRE_CONSTRUCTOR, AutowireCapableBeanFactory.AUTOWIRE_AUTODETECT

autowire

public Object autowire(Class beanClass,
                       int autowireMode,
                       boolean dependencyCheck)
                throws BeansException

Description copied from interface: AutowireCapableBeanFactory

Instantiate a new bean instance of the given class with the specified autowire strategy. All constants defined in this interface are supported here.

Does not apply any BeanPostProcessors or perform any further initialization of the bean. This interface offers distinct, fine-grained operations for those purposes, for example AutowireCapableBeanFactory.initializeBean(java.lang.Object, java.lang.String).

Specified by:

autowire in interface AutowireCapableBeanFactory

Parameters:

beanClass - the class of the bean to instantiate

autowireMode - by name or type, using the constants in this interface

dependencyCheck - whether to perform a dependency check for object references in the bean instance (not applicable to autowiring a constructor, thus ignored there)

Returns:

the new bean instance

Throws:

BeansException - if instantiation or wiring failed

See Also:

AutowireCapableBeanFactory.AUTOWIRE_NO, AutowireCapableBeanFactory.AUTOWIRE_BY_NAME, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, AutowireCapableBeanFactory.AUTOWIRE_CONSTRUCTOR, AutowireCapableBeanFactory.AUTOWIRE_AUTODETECT, AutowireCapableBeanFactory.initializeBean(java.lang.Object, java.lang.String), AutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(java.lang.Object, java.lang.String), AutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(java.lang.Object, java.lang.String)

autowireBeanProperties

public void autowireBeanProperties(Object existingBean,
                                   int autowireMode,
                                   boolean dependencyCheck)
                            throws BeansException

Description copied from interface: AutowireCapableBeanFactory

Autowire the bean properties of the given bean instance by name or type.

Specified by:

autowireBeanProperties in interface AutowireCapableBeanFactory

Parameters:

existingBean - the existing bean instance

autowireMode - by name or type, using the constants in this interface

dependencyCheck - whether to perform a dependency check for object references in the bean instance

Throws:

BeansException - if wiring failed

See Also:

AutowireCapableBeanFactory.AUTOWIRE_BY_NAME, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE

applyBeanPropertyValues

public void applyBeanPropertyValues(Object existingBean,
                                    String beanName)
                             throws BeansException

Description copied from interface: AutowireCapableBeanFactory

Apply the property values of the bean definition with the given name to the given bean instance. The bean definition can either define a fully self-contained bean, reusing its property values, or just property values meant to be used for existing bean instances.

Note: This method does not autowire bean properties; it just applies explicitly defined property values. Use the AutowireCapableBeanFactory.autowireBeanProperties(java.lang.Object, int, boolean) method to autowire an existing bean instance.

Specified by:

applyBeanPropertyValues in interface AutowireCapableBeanFactory

Parameters:

existingBean - the existing bean instance

beanName - the name of the bean definition in the bean factory (a bean definition of that name has to be available)

Throws:

NoSuchBeanDefinitionException - if there is no bean with the given name

BeansException - if applying the property values failed

See Also:

AutowireCapableBeanFactory.autowireBeanProperties(java.lang.Object, int, boolean)

configureBean

public Object configureBean(Object existingBean,
                            String beanName)
                     throws BeansException

Description copied from interface: AutowireCapableBeanFactory

Configure the given bean instance: autowiring bean properties, applying bean property values, applying factory callbacks such as setBeanName and setBeanFactory, and also applying all bean post processors.

This is effectively a superset of what initializeBean provides, fully applying the configuration specified by the corresponding bean definition.

Specified by:

configureBean in interface AutowireCapableBeanFactory

Parameters:

existingBean - the existing bean instance

beanName - the name of the bean, to be passed to it if necessary (a bean definition of that name has to be available)

Returns:

the bean instance to use, either the original or a wrapped one

Throws:

NoSuchBeanDefinitionException - if there is no bean with the given name

BeansException - if the initialization failed

See Also:

AutowireCapableBeanFactory.initializeBean(java.lang.Object, java.lang.String)

initializeBean

public Object initializeBean(Object existingBean,
                             String beanName)

Description copied from interface: AutowireCapableBeanFactory

Initialize the given bean instance, applying factory callbacks such as setBeanName and setBeanFactory, also applying all bean post processors.

Note that no bean definition of the given name has to exist in the bean factory. The passed-in bean name will simply be used for callbacks but not checked against the registered bean definitions.

Specified by:

initializeBean in interface AutowireCapableBeanFactory

Parameters:

existingBean - the existing bean instance

beanName - the name of the bean, to be passed to it if necessary (only passed to BeanPostProcessors)

Returns:

the bean instance to use, either the original or a wrapped one

applyBeanPostProcessorsBeforeInitialization

public Object applyBeanPostProcessorsBeforeInitialization(Object existingBean,
                                                          String beanName)
                                                   throws BeansException

Description copied from interface: AutowireCapableBeanFactory

Apply BeanPostProcessors to the given existing bean instance, invoking their postProcessBeforeInitialization methods. The returned bean instance may be a wrapper around the original.

Specified by:

applyBeanPostProcessorsBeforeInitialization in interface AutowireCapableBeanFactory

Parameters:

existingBean - the new bean instance

beanName - the name of the bean

Returns:

the bean instance to use, either the original or a wrapped one

Throws:

BeansException - if any post-processing failed

See Also:

BeanPostProcessor.postProcessBeforeInitialization(java.lang.Object, java.lang.String)

applyBeanPostProcessorsAfterInitialization

public Object applyBeanPostProcessorsAfterInitialization(Object existingBean,
                                                         String beanName)
                                                  throws BeansException

Description copied from interface: AutowireCapableBeanFactory

Apply BeanPostProcessors to the given existing bean instance, invoking their postProcessAfterInitialization methods. The returned bean instance may be a wrapper around the original.

Specified by:

applyBeanPostProcessorsAfterInitialization in interface AutowireCapableBeanFactory

Parameters:

existingBean - the new bean instance

beanName - the name of the bean

Returns:

the bean instance to use, either the original or a wrapped one

Throws:

BeansException - if any post-processing failed

See Also:

BeanPostProcessor.postProcessAfterInitialization(java.lang.Object, java.lang.String)

createBean

protected Object createBean(String beanName,
                            RootBeanDefinition mbd,
                            Object[] args)
                     throws BeanCreationException

Central method of this class: creates a bean instance, populates the bean instance, applies post-processors, etc.

Differentiates between default bean instantiation, use of a factory method, and autowiring a constructor.

Specified by:

createBean in class AbstractBeanFactory

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

See Also:

instantiateBean(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition), instantiateUsingFactoryMethod(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, java.lang.Object[]), autowireConstructor(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, java.lang.reflect.Constructor)

predictBeanType

protected Class predictBeanType(String beanName,
                                RootBeanDefinition mbd)

Predict the eventual bean type for the given bean.

Overrides:

predictBeanType in class AbstractBeanFactory

Parameters:

beanName - the name of the bean

mbd - the merged bean definition to determine the type for

Returns:

the type of the bean, or null if not predictable

getTypeForFactoryMethod

protected Class getTypeForFactoryMethod(String beanName,
                                        RootBeanDefinition mbd)

Determine the bean type for the given bean definition which is based on a factory method. Only called if there is no singleton instance registered for the target bean already.

This implementation determines the type matching createBean(java.lang.Class, int, boolean)'s different creation strategies. As far as possible, we'll perform static type checking to avoid creation of the target bean.

Parameters:

beanName - the name of the bean (for error handling purposes)

mbd - the merged bean definition for the bean

Returns:

the type for the bean if determinable, or null else

See Also:

createBean(java.lang.Class, int, boolean)

getTypeForFactoryBean

protected Class getTypeForFactoryBean(String beanName,
                                      RootBeanDefinition mbd)

This implementation checks the FactoryBean's getObjectType method on a plain instance of the FactoryBean, without bean properties applied yet. If this doesn't return a type yet, a full creation of the FactoryBean is used as fallback (through delegation to the superclass's implementation).

The shortcut check for a FactoryBean is only applied in case of a singleton FactoryBean. If the FactoryBean instance itself is not kept as singleton, it will be fully created to check the type of its exposed object.

Overrides:

getTypeForFactoryBean in class AbstractBeanFactory

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(), AbstractBeanFactory.getBean(String)

applyBeanPostProcessorsBeforeInstantiation

protected Object applyBeanPostProcessorsBeforeInstantiation(Class beanClass,
                                                            String beanName)
                                                     throws BeansException

Apply InstantiationAwareBeanPostProcessors to the specified bean definition (by class and name), invoking their postProcessBeforeInstantiation methods.

Any returned object will be used as the bean instead of actually instantiating the target bean. A null return value from the post-processor will result in the target bean being instantiated.

Parameters:

beanClass - the class of the bean to be instantiated

beanName - the name of the bean

Returns:

the bean object to use instead of a default instance of the target bean, or null

Throws:

BeansException - if any post-processing failed

See Also:

InstantiationAwareBeanPostProcessor.postProcessBeforeInstantiation(java.lang.Class, java.lang.String)

createBeanInstance

protected BeanWrapper createBeanInstance(String beanName,
                                         RootBeanDefinition mbd,
                                         Object[] args)

Create a new instance for the specified bean, using an appropriate instantiation strategy: factory method, constructor autowiring, or simple instantiation.

Parameters:

beanName - the name of the bean

mbd - the bean definition for the bean

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:

BeanWrapper for the new instance

See Also:

instantiateUsingFactoryMethod(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, java.lang.Object[]), autowireConstructor(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, java.lang.reflect.Constructor), instantiateBean(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition)

determineConstructorFromBeanPostProcessors

protected Constructor determineConstructorFromBeanPostProcessors(Class beanClass,
                                                                 String beanName)
                                                          throws BeansException

Determine the constructor to use for the given bean, checking all registered SmartInstantiationAwareBeanPostProcessors.

Parameters:

beanClass - the raw class of the bean

beanName - the name of the bean

Returns:

the constructor to use, or null if none specified

Throws:

BeansException - in case of errors

See Also:

SmartInstantiationAwareBeanPostProcessor.determineConstructor(java.lang.Class, java.lang.String)

instantiateBean

protected BeanWrapper instantiateBean(String beanName,
                                      RootBeanDefinition mbd)

Instantiate the given bean using its default constructor.

Parameters:

beanName - the name of the bean

mbd - the bean definition for the bean

Returns:

BeanWrapper for the new instance

instantiateUsingFactoryMethod

protected BeanWrapper instantiateUsingFactoryMethod(String beanName,
                                                    RootBeanDefinition mbd,
                                                    Object[] explicitArgs)

Instantiate the bean using a named factory method. The method may be static, if the mbd parameter specifies a class, rather than a factoryBean, or an instance variable on a factory object itself configured using Dependency Injection.

Implementation requires iterating over the static or instance methods with the name specified in the RootBeanDefinition (the method may be overloaded) and trying to match with the parameters. We don't have the types attached to constructor args, so trial and error is the only way to go here. The explicitArgs array may contain argument values passed in programmatically via the corresponding getBean method.

Parameters:

beanName - the name of the bean

mbd - the bean definition for the bean

explicitArgs - argument values passed in programmatically via the getBean method, or null if none (-> use constructor argument values from bean definition)

Returns:

BeanWrapper for the new instance

See Also:

AbstractBeanFactory.getBean(String, Object[])

autowireConstructor

protected BeanWrapper autowireConstructor(String beanName,
                                          RootBeanDefinition mbd,
                                          Constructor ctor)

"autowire constructor" (with constructor arguments by type) behavior. Also applied if explicit constructor argument values are specified, matching all remaining arguments with beans from the bean factory.

This corresponds to constructor injection: In this mode, a Spring bean factory is able to host components that expect constructor-based dependency resolution.

Parameters:

beanName - the name of the bean

mbd - the bean definition for the bean

ctor - the chosen candidate constructor

Returns:

BeanWrapper for the new instance

populateBean

protected void populateBean(String beanName,
                            RootBeanDefinition mbd,
                            BeanWrapper bw)

Populate the bean instance in the given BeanWrapper with the property values from the bean definition.

Parameters:

beanName - the name of the bean

mbd - the bean definition for the bean

bw - BeanWrapper with bean instance

autowireByName

protected void autowireByName(String beanName,
                              RootBeanDefinition mbd,
                              BeanWrapper bw,
                              MutablePropertyValues pvs)

Fill in any missing property values with references to other beans in this factory if autowire is set to "byName".

Parameters:

beanName - the name of the bean we're wiring up. Useful for debugging messages; not used functionally.

mbd - bean definition to update through autowiring

bw - BeanWrapper from which we can obtain information about the bean

pvs - the PropertyValues to register wired objects with

autowireByType

protected void autowireByType(String beanName,
                              RootBeanDefinition mbd,
                              BeanWrapper bw,
                              MutablePropertyValues pvs)

Abstract method defining "autowire by type" (bean properties by type) behavior.

This is like PicoContainer default, in which there must be exactly one bean of the property type in the bean factory. This makes bean factories simple to configure for small namespaces, but doesn't work as well as standard Spring behavior for bigger applications.

Parameters:

beanName - the name of the bean to autowire by type

mbd - the merged bean definition to update through autowiring

bw - BeanWrapper from which we can obtain information about the bean

pvs - the PropertyValues to register wired objects with

unsatisfiedNonSimpleProperties

protected String[] unsatisfiedNonSimpleProperties(RootBeanDefinition mbd,
                                                  BeanWrapper bw)

Return an array of non-simple bean properties that are unsatisfied. These are probably unsatisfied references to other beans in the factory. Does not include simple properties like primitives or Strings.

Parameters:

mbd - the merged bean definition the bean was created with

bw - the BeanWrapper the bean was created with

Returns:

an array of bean property names

See Also:

BeanUtils.isSimpleProperty(java.lang.Class)

filterPropertyDescriptorsForDependencyCheck

protected PropertyDescriptor[] filterPropertyDescriptorsForDependencyCheck(BeanWrapper bw)

Extract a filtered set of PropertyDescriptors from the given BeanWrapper, excluding ignored dependency types or properties defined on ignored dependency interfaces.

Parameters:

bw - the BeanWrapper the bean was created with

Returns:

the filtered PropertyDescriptors

See Also:

isExcludedFromDependencyCheck(java.beans.PropertyDescriptor)

isExcludedFromDependencyCheck

protected boolean isExcludedFromDependencyCheck(PropertyDescriptor pd)

Determine whether the given bean property is excluded from dependency checks.

This implementation excludes properties defined by CGLIB and properties whose type matches an ignored dependency type or which are defined by an ignored dependency interface.

Parameters:

pd - the PropertyDescriptor of the bean property

Returns:

whether the bean property is excluded

See Also:

ignoreDependencyType(Class), ignoreDependencyInterface(Class)

checkDependencies

protected void checkDependencies(String beanName,
                                 RootBeanDefinition mbd,
                                 PropertyDescriptor[] pds,
                                 PropertyValues pvs)
                          throws UnsatisfiedDependencyException

Perform a dependency check that all properties exposed have been set, if desired. Dependency checks can be objects (collaborating beans), simple (primitives and String), or all (both).

Parameters:

beanName - the name of the bean

mbd - the merged bean definition the bean was created with

pds - the relevant property descriptors for the target bean

pvs - the property values to be applied to the bean

Throws:

UnsatisfiedDependencyException

See Also:

isExcludedFromDependencyCheck(java.beans.PropertyDescriptor)

applyPropertyValues

protected void applyPropertyValues(String beanName,
                                   RootBeanDefinition mbd,
                                   BeanWrapper bw,
                                   PropertyValues pvs)

Apply the given property values, resolving any runtime references to other beans in this bean factory. Must use deep copy, so we don't permanently modify this property.

Parameters:

beanName - the bean name passed for better exception information

mbd - the merged bean definition

bw - the BeanWrapper wrapping the target object

pvs - the new property values

initializeBean

protected Object initializeBean(String beanName,
                                Object bean,
                                RootBeanDefinition mbd)

Initialize the given bean instance, applying factory callbacks as well as init methods and bean post processors.

Called from createBean(java.lang.Class, int, boolean) for traditionally defined beans, and from initializeBean(java.lang.Object, java.lang.String) for existing bean instances.

Parameters:

beanName - the bean name in the factory (for debugging purposes)

bean - the new bean instance we may need to initialize

mbd - the bean definition that the bean was created with (can also be null, if given an existing bean instance)

Returns:

the initialized bean instance (potentially wrapped)

See Also:

BeanNameAware, BeanClassLoaderAware, BeanFactoryAware, applyBeanPostProcessorsBeforeInitialization(java.lang.Object, java.lang.String), invokeInitMethods(java.lang.String, java.lang.Object, org.springframework.beans.factory.support.RootBeanDefinition), applyBeanPostProcessorsAfterInitialization(java.lang.Object, java.lang.String)

invokeInitMethods

protected void invokeInitMethods(String beanName,
                                 Object bean,
                                 RootBeanDefinition mbd)
                          throws Throwable

Give a bean a chance to react now all its properties are set, and a chance to know about its owning bean factory (this object). This means checking whether the bean implements InitializingBean or defines a custom init method, and invoking the necessary callback(s) if it does.

Parameters:

beanName - the bean name in the factory (for debugging purposes)

bean - the new bean instance we may need to initialize

mbd - the merged bean definition that the bean was created with (can also be null, if given an existing bean instance)

Throws:

Throwable - if thrown by init methods or by the invocation process

See Also:

invokeCustomInitMethod(java.lang.String, java.lang.Object, java.lang.String, boolean)

invokeCustomInitMethod

protected void invokeCustomInitMethod(String beanName,
                                      Object bean,
                                      String initMethodName,
                                      boolean enforceInitMethod)
                               throws Throwable

Invoke the specified custom init method on the given bean. Called by invokeInitMethods.

Can be overridden in subclasses for custom resolution of init methods with arguments.

Parameters:

beanName - the bean name in the factory (for debugging purposes)

bean - the new bean instance we may need to initialize

initMethodName - the name of the custom init method

enforceInitMethod - indicates whether the defined init method needs to exist

Throws:

Throwable

See Also:

invokeInitMethods(java.lang.String, java.lang.Object, org.springframework.beans.factory.support.RootBeanDefinition)

postProcessObjectFromFactoryBean

protected Object postProcessObjectFromFactoryBean(Object object,
                                                  String beanName)

Applies the postProcessAfterInitialization callback of all registered BeanPostProcessors, giving them a chance to post-process the object obtained from FactoryBeans (for example, to auto-proxy them).

Overrides:

postProcessObjectFromFactoryBean in class AbstractBeanFactory

Parameters:

object - the object obtained from the FactoryBean.

beanName - the name of the bean

Returns:

the object to expose

See Also:

applyBeanPostProcessorsAfterInitialization(java.lang.Object, java.lang.String)

removeSingleton

protected void removeSingleton(String beanName)

Overridden to clear FactoryBean instance cache as well.

Overrides:

removeSingleton in class AbstractBeanFactory

Parameters:

beanName - the name of the bean

findAutowireCandidates

protected Map findAutowireCandidates(String beanName,
                                     Class requiredType)
                              throws BeansException

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

If a subclass cannot obtain information about bean names by type, a corresponding exception should be thrown.

Parameters:

beanName - the name of the bean that is about to be wired

requiredType - the type of the autowired property or argument

Returns:

a Map of candidate names and candidate instances that match the required type (never null)

Throws:

BeansException - in case of errors

See Also:

autowireByType(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, org.springframework.beans.BeanWrapper, org.springframework.beans.MutablePropertyValues), autowireConstructor(java.lang.String, org.springframework.beans.factory.support.RootBeanDefinition, java.lang.reflect.Constructor)

findMatchingBeans

protected Map findMatchingBeans(Class requiredType)
                         throws BeansException

Deprecated. as of Spring 2.0.1: Override findAutowireCandidates instead

Find bean instances that match the required type. Called by autowiring.

Parameters:

requiredType - the type of the beans to look up

Returns:

a Map of bean names and bean instances that match the required type, or null if none found

Throws:

BeansException - in case of errors