当前页面: 在线文档首页 > Spring Framework 2.1.0 API 文档英文版

StaticListableBeanFactory (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		The Spring Framework
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

org.springframework.beans.factory.support
Class StaticListableBeanFactory

java.lang.Object
  org.springframework.beans.factory.support.StaticListableBeanFactory

All Implemented Interfaces:

BeanFactory, ListableBeanFactory

---

public class StaticListableBeanFactory
extends Object
implements ListableBeanFactory

Static BeanFactory implementation which allows to register existing singleton instances programmatically. Does not have support for prototype beans or aliases.

Serves as example for a simple implementation of the ListableBeanFactory interface, managing existing bean instances rather than creating new ones based on bean definitions, and not implementing any extended SPI interfaces (such as ConfigurableBeanFactory).

For a full-fledged factory based on bean definitions, have a look at DefaultListableBeanFactory.

Since:

06.01.2003

Author:

Rod Johnson, Juergen Hoeller

See Also:

DefaultListableBeanFactory

---

Field Summary

 

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

 

Constructor Summary
StaticListableBeanFactory()

 

Method Summary
void	addBean(String name, Object bean)           Add a new singleton bean.
boolean	containsBean(String name)           Does this bean factory contain a bean with the given name?
boolean	containsBeanDefinition(String name)           Check if this bean factory contains a bean definition with the given name.
String[]	getAliases(String name)           Return the aliases for the given bean name, if any.
Object	getBean(String name)           Return an instance, which may be shared or independent, of the specified bean.
Object	getBean(String name, Class requiredType)           Return an instance, which may be shared or independent, of the specified bean.
int	getBeanDefinitionCount()           Return the number of beans defined in the factory.
String[]	getBeanDefinitionNames()           Return the names of all beans defined in this factory.
String[]	getBeanNamesForType(Class type)           Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.
String[]	getBeanNamesForType(Class type, boolean includePrototypes, boolean includeFactoryBeans)           Return the names of beans matching the given type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.
Map	getBeansOfType(Class type)           Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.
Map	getBeansOfType(Class type, boolean includePrototypes, boolean includeFactoryBeans)           Return the bean instances that match the given object type (including subclasses), judging from either bean definitions or the value of getObjectType in the case of FactoryBeans.
Class	getType(String name)           Determine the type of the bean with the given name.
boolean	isPrototype(String name)           Is this bean a prototype?
boolean	isSingleton(String name)           Is this bean a shared singleton?
boolean	isTypeMatch(String name, Class targetType)           Check whether the bean with the given name matches the specified type.

 

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

 

Constructor Detail

StaticListableBeanFactory

public StaticListableBeanFactory()

Method Detail

addBean

public void addBean(String name,
                    Object bean)

Add a new singleton bean. Will overwrite any existing instance for the given name.

Parameters:

name - the name of the bean

bean - the bean instance

---

getBean

public Object getBean(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 Object getBean(String name,
                      Class 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:

BeanNotOfRequiredTypeException - if the bean is not of the required type

NoSuchBeanDefinitionException - if there's no such bean definition

BeansException - if the bean could not be created

---

containsBean

public boolean containsBean(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(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(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(String name,
                           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 Class getType(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 String[] getAliases(String name)

Description copied from interface: BeanFactory

Return the aliases for the given bean name, if any. All of those aliases point to the same bean when used in a BeanFactory.getBean(java.lang.String) call.

If the given name is an alias, the corresponding original bean name and other aliases (if any) will be returned, with the original bean name being the first element in the array.

Will ask the parent factory if the bean cannot be found in this factory instance.

Specified by:

getAliases in interface BeanFactory

Parameters:

name - the bean name to check for aliases

Returns:

the aliases, or an empty array if none

See Also:

BeanFactory.getBean(java.lang.String)

---

containsBeanDefinition

public boolean containsBeanDefinition(String name)

Description copied from interface: ListableBeanFactory

Check if this bean factory contains a bean definition with the given name.

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

Specified by:

containsBeanDefinition in interface ListableBeanFactory

Parameters:

name - the name of the bean to look for

Returns:

if this bean factory contains a bean definition with the given name

See Also:

BeanFactory.containsBean(java.lang.String)

---

getBeanDefinitionCount

public int getBeanDefinitionCount()

Description copied from interface: ListableBeanFactory

Return the number of beans defined in the factory.

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

Specified by:

getBeanDefinitionCount in interface ListableBeanFactory

Returns:

the number of beans defined in the factory

---

getBeanDefinitionNames

public String[] getBeanDefinitionNames()

Description copied from interface: ListableBeanFactory

Return the names of all beans defined in this factory.

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

Specified by:

getBeanDefinitionNames in interface ListableBeanFactory

Returns:

the names of all beans defined in this factory, or an empty array if none defined

---

getBeanNamesForType

public String[] getBeanNamesForType(Class type)

Description copied from interface: ListableBeanFactory

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

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

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

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

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

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

Specified by:

getBeanNamesForType in interface ListableBeanFactory

Parameters:

type - the class or interface to match, or null for all bean names

Returns:

the names of beans (or objects created by FactoryBeans) matching the given object type (including subclasses), or an empty array if none

See Also:

FactoryBean.getObjectType(), BeanFactoryUtils.beanNamesForTypeIncludingAncestors(ListableBeanFactory, Class)

---

getBeanNamesForType

public String[] getBeanNamesForType(Class type,
                                    boolean includePrototypes,
                                    boolean includeFactoryBeans)

Description copied from interface: ListableBeanFactory

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

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

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

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

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

Specified by:

getBeanNamesForType in interface ListableBeanFactory

Parameters:

type - the class or interface to match, or null for all bean names

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

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

Returns:

the names of beans (or objects created by FactoryBeans) matching the given object type (including subclasses), or an empty array if none

See Also:

FactoryBean.getObjectType(), BeanFactoryUtils.beanNamesForTypeIncludingAncestors(ListableBeanFactory, Class, boolean, boolean)

---

getBeansOfType

public Map getBeansOfType(Class type)
                   throws BeansException

Description copied from interface: ListableBeanFactory

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

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

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

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

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

The Map returned by this method should always return bean names and corresponding bean instances in the order of definition in the backend configuration, as far as possible. This will usually mean that either JDK 1.4 or Commons Collections needs to be available.

Specified by:

getBeansOfType in interface ListableBeanFactory

Parameters:

type - the class or interface to match, or null for all concrete beans

Returns:

a Map with the matching beans, containing the bean names as keys and the corresponding bean instances as values

Throws:

BeansException - if a bean could not be created

See Also:

FactoryBean.getObjectType(), BeanFactoryUtils.beansOfTypeIncludingAncestors(ListableBeanFactory, Class)

---

getBeansOfType

public Map getBeansOfType(Class type,
                          boolean includePrototypes,
                          boolean includeFactoryBeans)
                   throws BeansException

Description copied from interface: ListableBeanFactory

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

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

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

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

The Map returned by this method should always return bean names and corresponding bean instances in the order of definition in the backend configuration, as far as possible. This will usually mean that either JDK 1.4 or Commons Collections needs to be available.

Specified by:

getBeansOfType in interface ListableBeanFactory

Parameters:

type - the class or interface to match, or null for all concrete beans

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

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

Returns:

a Map with the matching beans, containing the bean names as keys and the corresponding bean instances as values

Throws:

BeansException - if a bean could not be created

See Also:

FactoryBean.getObjectType(), BeanFactoryUtils.beansOfTypeIncludingAncestors(ListableBeanFactory, Class, boolean, boolean)

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		The Spring Framework
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

Copyright © 2002-2007 The Spring Framework.