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## org.springframework.beans.factory.support
Class SimpleBeanDefinitionRegistry

    java.lang.Object
      org.springframework.core.SimpleAliasRegistry
          org.springframework.beans.factory.support.SimpleBeanDefinitionRegistry

All Implemented Interfaces:
  BeanDefinitionRegistry, AliasRegistry

    public class SimpleBeanDefinitionRegistry

extends SimpleAliasRegistry
implements BeanDefinitionRegistry

Simple implementation of the `BeanDefinitionRegistry` interface. Provides registry capabilities only, with no factory capabilities built in. Can for example be used for testing bean definition readers.

Since:
  2.5.2
Author:
  Juergen Hoeller

Constructor Summary
`SimpleBeanDefinitionRegistry()`

Method Summary
`boolean` | `containsBeanDefinition(String beanName)` Check if this registry contains a bean definition with the given name.
`BeanDefinition` | `getBeanDefinition(String beanName)` Return the BeanDefinition for the given bean name.
`int` | `getBeanDefinitionCount()` Return the number of beans defined in the registry.
`String[]` | `getBeanDefinitionNames()` Return the names of all beans defined in this registry.
`boolean` | `isBeanNameInUse(String beanName)` Determine whether the given bean name is already in use within this registry, i.e.
`void` | `registerBeanDefinition(String beanName, BeanDefinition beanDefinition)` Register a new bean definition with this registry.
`void` | `removeBeanDefinition(String beanName)` Remove the BeanDefinition for the given name.

Methods inherited from class org.springframework.core.SimpleAliasRegistry
`allowAliasOverriding, canonicalName, checkForAliasCircle, getAliases, isAlias, registerAlias, removeAlias, resolveAliases`

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

Methods inherited from interface org.springframework.core.AliasRegistry
`getAliases, isAlias, registerAlias, removeAlias`

Constructor Detail

### SimpleBeanDefinitionRegistry

    public SimpleBeanDefinitionRegistry()

Method Detail

### registerBeanDefinition

    public void registerBeanDefinition(String beanName,
                                       BeanDefinition beanDefinition)
                                throws BeanDefinitionStoreException

  Description copied from interface: `BeanDefinitionRegistry`
  Register a new bean definition with this registry. Must support RootBeanDefinition and ChildBeanDefinition.

  Specified by:
    `registerBeanDefinition` in interface `BeanDefinitionRegistry`
  Parameters:
    `beanName` - the name of the bean instance to register
    `beanDefinition` - definition of the bean instance to register
  Throws:
    `BeanDefinitionStoreException` - if the BeanDefinition is invalid or if there is already a BeanDefinition for the specified bean name (and we are not allowed to override it)
  See Also:
    `RootBeanDefinition`, `ChildBeanDefinition`

### removeBeanDefinition

    public void removeBeanDefinition(String beanName)
                              throws NoSuchBeanDefinitionException

  Description copied from interface: `BeanDefinitionRegistry`
  Remove the BeanDefinition for the given name.

  Specified by:
    `removeBeanDefinition` in interface `BeanDefinitionRegistry`
  Parameters:
    `beanName` - the name of the bean instance to register
  Throws:
    `NoSuchBeanDefinitionException` - if there is no such bean definition

### getBeanDefinition

    public BeanDefinition getBeanDefinition(String beanName)
                                     throws NoSuchBeanDefinitionException

  Description copied from interface: `BeanDefinitionRegistry`
  Return the BeanDefinition for the given bean name.

  Specified by:
    `getBeanDefinition` in interface `BeanDefinitionRegistry`
  Parameters:
    `beanName` - name of the bean to find a definition for
  Returns:
    the BeanDefinition for the given name (never `null`)
  Throws:
    `NoSuchBeanDefinitionException` - if there is no such bean definition

### containsBeanDefinition

    public boolean containsBeanDefinition(String beanName)

  Description copied from interface: `BeanDefinitionRegistry`
  Check if this registry contains a bean definition with the given name.

  Specified by:
    `containsBeanDefinition` in interface `BeanDefinitionRegistry`
  Parameters:
    `beanName` - the name of the bean to look for
  Returns:
    if this registry contains a bean definition with the given name

### getBeanDefinitionNames

    public String[] getBeanDefinitionNames()

  Description copied from interface: `BeanDefinitionRegistry`
  Return the names of all beans defined in this registry.

  Specified by:
    `getBeanDefinitionNames` in interface `BeanDefinitionRegistry`
  Returns:
    the names of all beans defined in this registry, or an empty array if none defined

### getBeanDefinitionCount

    public int getBeanDefinitionCount()

  Description copied from interface: `BeanDefinitionRegistry`
  Return the number of beans defined in the registry.

  Specified by:
    `getBeanDefinitionCount` in interface `BeanDefinitionRegistry`
  Returns:
    the number of beans defined in the registry

### isBeanNameInUse

    public boolean isBeanNameInUse(String beanName)

  Description copied from interface: `BeanDefinitionRegistry`
  Determine whether the given bean name is already in use within this registry, i.e. whether there is a local bean or alias registered under this name.

  Specified by:
    `isBeanNameInUse` in interface `BeanDefinitionRegistry`
  Parameters:
    `beanName` - the name to check
  Returns:
    whether the given bean name is already in use

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