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## 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.
`Object` | `getBean(String name, Object[] args)` 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 includeNonSingletons, 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 includeNonSingletons, 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:
    `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 Object getBean(String name,
                          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

### 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.

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

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

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

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

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

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

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

### getBeanNamesForType

    public String[] getBeanNamesForType(Class type,
                                        boolean includeNonSingletons,
                                        boolean 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.

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

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

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

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

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

  Specified by:
    `getBeanNamesForType` in interface `ListableBeanFactory`
  Parameters:
    `type` - the class or interface to match, or `null` for all bean names
    `includeNonSingletons` - whether to include prototype or scoped beans too or just singletons (also applies to FactoryBeans)
    `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.

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

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

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

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

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

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

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

### getBeansOfType

    public Map getBeansOfType(Class type,
                              boolean includeNonSingletons,
                              boolean 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.

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

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

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

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

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

  Specified by:
    `getBeansOfType` in interface `ListableBeanFactory`
  Parameters:
    `type` - the class or interface to match, or `null` for all concrete beans
    `includeNonSingletons` - whether to include prototype or scoped beans too or just singletons (also applies to FactoryBeans)
    `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)`

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