org.springframework.beans.factory
Class BeanFactoryUtils

java.lang.Object
  org.springframework.beans.factory.BeanFactoryUtils

public abstract class BeanFactoryUtils
extends Object

Convenience methods operating on bean factories, in particular on the ListableBeanFactory interface.

Returns bean counts, bean names or bean instances, taking into account the nesting hierarchy of a bean factory (which the methods defined on the ListableBeanFactory interface don't, in contrast to the methods defined on the BeanFactory interface).

Since:

04.07.2003

Author:

Rod Johnson, Juergen Hoeller

See Also:

ListableBeanFactory

Field Summary

static String

GENERATED_BEAN_NAME_SEPARATOR Separator for generated bean names.

Constructor Summary

BeanFactoryUtils()

Method Summary

static String[]	beanNamesForTypeIncludingAncestors(ListableBeanFactory lbf, Class type) Get all bean names for the given type, including those defined in ancestor factories.
static String[]	beanNamesForTypeIncludingAncestors(ListableBeanFactory lbf, Class type, boolean includePrototypes, boolean allowEagerInit) Get all bean names for the given type, including those defined in ancestor factories.
static String[]	beanNamesIncludingAncestors(ListableBeanFactory lbf) Return all bean names in the factory, including ancestor factories.
static Object	beanOfType(ListableBeanFactory lbf, Class type) Return a single bean of the given type or subtypes, not looking in ancestor factories.
static Object	beanOfType(ListableBeanFactory lbf, Class type, boolean includePrototypes, boolean allowEagerInit) Return a single bean of the given type or subtypes, not looking in ancestor factories.
static Object	beanOfTypeIncludingAncestors(ListableBeanFactory lbf, Class type) Return a single bean of the given type or subtypes, also picking up beans defined in ancestor bean factories if the current bean factory is a HierarchicalBeanFactory.
static Object	beanOfTypeIncludingAncestors(ListableBeanFactory lbf, Class type, boolean includePrototypes, boolean allowEagerInit) Return a single bean of the given type or subtypes, also picking up beans defined in ancestor bean factories if the current bean factory is a HierarchicalBeanFactory.
static Map	beansOfTypeIncludingAncestors(ListableBeanFactory lbf, Class type) Return all beans of the given type or subtypes, also picking up beans defined in ancestor bean factories if the current bean factory is a HierarchicalBeanFactory.
static Map	beansOfTypeIncludingAncestors(ListableBeanFactory lbf, Class type, boolean includePrototypes, boolean allowEagerInit) Return all beans of the given type or subtypes, also picking up beans defined in ancestor bean factories if the current bean factory is a HierarchicalBeanFactory.
static int	countBeansIncludingAncestors(ListableBeanFactory lbf) Count all beans in any hierarchy in which this factory participates.
static boolean	isFactoryDereference(String name) Return whether the given name is a factory dereference (beginning with the factory dereference prefix).
static String	originalBeanName(String name) Extract the "raw" bean name from the given (potentially generated) bean name, excluding any "#..." suffixes which might have been added for uniqueness.
static String	transformedBeanName(String name) Return the actual bean name, stripping out the factory dereference prefix (if any).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

GENERATED_BEAN_NAME_SEPARATOR

public static final String GENERATED_BEAN_NAME_SEPARATOR

Separator for generated bean names. If a class name or parent name is not unique, "#1", "#2" etc will be appended, until the name becomes unique.

See Also:

Constant Field Values

Constructor Detail

BeanFactoryUtils

public BeanFactoryUtils()

Method Detail

isFactoryDereference

public static boolean isFactoryDereference(String name)

Return whether the given name is a factory dereference (beginning with the factory dereference prefix).

See Also:

BeanFactory.FACTORY_BEAN_PREFIX

transformedBeanName

public static String transformedBeanName(String name)

Return the actual bean name, stripping out the factory dereference prefix (if any).

See Also:

BeanFactory.FACTORY_BEAN_PREFIX

originalBeanName

public static String originalBeanName(String name)

Extract the "raw" bean name from the given (potentially generated) bean name, excluding any "#..." suffixes which might have been added for uniqueness.

Parameters:

name - the potentially generated bean name

Returns:

the raw bean name

See Also:

GENERATED_BEAN_NAME_SEPARATOR

countBeansIncludingAncestors

public static int countBeansIncludingAncestors(ListableBeanFactory lbf)

Count all beans in any hierarchy in which this factory participates. Includes counts of ancestor bean factories.

Beans that are "overridden" (specified in a descendant factory with the same name) are only counted once.

Parameters:

lbf - the bean factory

Returns:

count of beans including those defined in ancestor factories

beanNamesIncludingAncestors

public static String[] beanNamesIncludingAncestors(ListableBeanFactory lbf)

Return all bean names in the factory, including ancestor factories.

Parameters:

lbf - the bean factory

Returns:

the array of matching bean names, or an empty array if none

See Also:

beanNamesForTypeIncludingAncestors(org.springframework.beans.factory.ListableBeanFactory, java.lang.Class)

beanNamesForTypeIncludingAncestors

public static String[] beanNamesForTypeIncludingAncestors(ListableBeanFactory lbf,
                                                          Class type)

Get all bean names for the given type, including those defined in ancestor factories. Will return unique names in case of overridden bean definitions.

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

This version of beanNamesForTypeIncludingAncestors automatically includes prototypes and FactoryBeans.

Parameters:

lbf - the bean factory

type - the type that beans must match

Returns:

the array of matching bean names, or an empty array if none

beanNamesForTypeIncludingAncestors

public static String[] beanNamesForTypeIncludingAncestors(ListableBeanFactory lbf,
                                                          Class type,
                                                          boolean includePrototypes,
                                                          boolean allowEagerInit)

Get all bean names for the given type, including those defined in ancestor factories. Will return unique names in case of overridden bean definitions.

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

Parameters:

lbf - the bean factory

includePrototypes - whether to include prototype beans too or just singletons (also applies to FactoryBeans)

allowEagerInit - whether to initialize lazy-init singletons and objects created by FactoryBeans (or by factory methods with a "factory-bean" reference) for the type check. Note that FactoryBeans need to be eagerly initialized to determine their type: So be aware that passing in "true" for this flag will initialize FactoryBeans and "factory-bean" references.

type - the type that beans must match

Returns:

the array of matching bean names, or an empty array if none

beansOfTypeIncludingAncestors

public static Map beansOfTypeIncludingAncestors(ListableBeanFactory lbf,
                                                Class type)
                                         throws BeansException

Return all beans of the given type or subtypes, also picking up beans defined in ancestor bean factories if the current bean factory is a HierarchicalBeanFactory. The returned Map will only contain beans of this type.

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

Parameters:

lbf - the bean factory

type - type of bean to match

Returns:

the Map of matching bean instances, or an empty Map if none

Throws:

BeansException - if a bean could not be created

beansOfTypeIncludingAncestors

public static Map beansOfTypeIncludingAncestors(ListableBeanFactory lbf,
                                                Class type,
                                                boolean includePrototypes,
                                                boolean allowEagerInit)
                                         throws BeansException

Return all beans of the given type or subtypes, also picking up beans defined in ancestor bean factories if the current bean factory is a HierarchicalBeanFactory. The returned Map will only contain beans of this type.

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

Parameters:

lbf - the bean factory

type - type of bean to match

includePrototypes - whether to include prototype beans too or just singletons (also applies to FactoryBeans)

allowEagerInit - whether to initialize lazy-init singletons and objects created by FactoryBeans (or by factory methods with a "factory-bean" reference) for the type check. Note that FactoryBeans need to be eagerly initialized to determine their type: So be aware that passing in "true" for this flag will initialize FactoryBeans and "factory-bean" references.

Returns:

the Map of matching bean instances, or an empty Map if none

Throws:

BeansException - if a bean could not be created

beanOfTypeIncludingAncestors

public static Object beanOfTypeIncludingAncestors(ListableBeanFactory lbf,
                                                  Class type)
                                           throws BeansException

Return a single bean of the given type or subtypes, also picking up beans defined in ancestor bean factories if the current bean factory is a HierarchicalBeanFactory. Useful convenience method when we expect a single bean and don't care about the bean name.

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

This version of beanOfTypeIncludingAncestors automatically includes prototypes and FactoryBeans.

Parameters:

lbf - the bean factory

type - type of bean to match

Returns:

the matching bean instance

Throws:

NoSuchBeanDefinitionException - if 0 or more than 1 beans of the given type were found

NoSuchBeanDefinitionException - if no single bean could be found for the given type

BeansException - if the bean could not be created

beanOfTypeIncludingAncestors

public static Object beanOfTypeIncludingAncestors(ListableBeanFactory lbf,
                                                  Class type,
                                                  boolean includePrototypes,
                                                  boolean allowEagerInit)
                                           throws BeansException

Return a single bean of the given type or subtypes, also picking up beans defined in ancestor bean factories if the current bean factory is a HierarchicalBeanFactory. Useful convenience method when we expect a single bean and don't care about the bean name.

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

Parameters:

lbf - the bean factory

type - type of bean to match

includePrototypes - whether to include prototype beans too or just singletons (also applies to FactoryBeans)

allowEagerInit - whether to initialize lazy-init singletons and objects created by FactoryBeans (or by factory methods with a "factory-bean" reference) for the type check. Note that FactoryBeans need to be eagerly initialized to determine their type: So be aware that passing in "true" for this flag will initialize FactoryBeans and "factory-bean" references.

Returns:

the matching bean instance

Throws:

NoSuchBeanDefinitionException - if 0 or more than 1 beans of the given type were found

NoSuchBeanDefinitionException - if no single bean could be found for the given type

BeansException - if the bean could not be created

beanOfType

public static Object beanOfType(ListableBeanFactory lbf,
                                Class type)
                         throws BeansException

Return a single bean of the given type or subtypes, not looking in ancestor factories. Useful convenience method when we expect a single bean and don't care about the bean name.

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

This version of beanOfType automatically includes prototypes and FactoryBeans.

Parameters:

lbf - the bean factory

type - type of bean to match

Returns:

the matching bean instance

Throws:

NoSuchBeanDefinitionException - if 0 or more than 1 beans of the given type were found

NoSuchBeanDefinitionException - if no single bean could be found for the given type

BeansException - if the bean could not be created

beanOfType

public static Object beanOfType(ListableBeanFactory lbf,
                                Class type,
                                boolean includePrototypes,
                                boolean allowEagerInit)
                         throws BeansException

Return a single bean of the given type or subtypes, not looking in ancestor factories. Useful convenience method when we expect a single bean and don't care about the bean name.

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

Parameters:

lbf - the bean factory

type - type of bean to match

includePrototypes - whether to include prototype beans too or just singletons (also applies to FactoryBeans)

allowEagerInit - whether to initialize lazy-init singletons and objects created by FactoryBeans (or by factory methods with a "factory-bean" reference) for the type check. Note that FactoryBeans need to be eagerly initialized to determine their type: So be aware that passing in "true" for this flag will initialize FactoryBeans and "factory-bean" references.

Returns:

the matching bean instance

Throws:

NoSuchBeanDefinitionException - if 0 or more than 1 beans of the given type were found

NoSuchBeanDefinitionException - if no single bean could be found for the given type

BeansException - if the bean could not be created