org.springframework.beans.factory.support

## Class ChildBeanDefinition

- java.lang.Object
- - org.springframework.core.AttributeAccessorSupport
  - - org.springframework.beans.BeanMetadataAttributeAccessor
    - - org.springframework.beans.factory.support.AbstractBeanDefinition
      - - org.springframework.beans.factory.support.ChildBeanDefinition

- All Implemented Interfaces:
    Serializable, Cloneable, BeanMetadataElement, BeanDefinition, AttributeAccessor

      public class ChildBeanDefinition
      extends AbstractBeanDefinition

  Bean definition for beans which inherit settings from their parent. Child bean definitions have a fixed dependency on a parent bean definition.

  A child bean definition will inherit constructor argument values, property values and method overrides from the parent, with the option to add new values. If init method, destroy method and/or static factory method are specified, they will override the corresponding parent settings. The remaining settings will always be taken from the child definition: depends on, autowire mode, dependency check, singleton, lazy init.

  NOTE: Since Spring 2.5, the preferred way to register bean definitions programmatically is the `GenericBeanDefinition` class, which allows to dynamically define parent dependencies through the `GenericBeanDefinition.setParentName(java.lang.String)` method. This effectively supersedes the ChildBeanDefinition class for most use cases.

  Author:
    Rod Johnson, Juergen Hoeller
  See Also:
    `GenericBeanDefinition`, `RootBeanDefinition`, Serialized Form

- - ### Field Summary

    - ### Fields inherited from class org.springframework.beans.factory.support.AbstractBeanDefinition

      `AUTOWIRE_AUTODETECT, AUTOWIRE_BY_NAME, AUTOWIRE_BY_TYPE, AUTOWIRE_CONSTRUCTOR, AUTOWIRE_NO, DEPENDENCY_CHECK_ALL, DEPENDENCY_CHECK_NONE, DEPENDENCY_CHECK_OBJECTS, DEPENDENCY_CHECK_SIMPLE, INFER_METHOD, SCOPE_DEFAULT`

    - ### Fields inherited from interface org.springframework.beans.factory.config.BeanDefinition

      `ROLE_APPLICATION, ROLE_INFRASTRUCTURE, ROLE_SUPPORT, SCOPE_PROTOTYPE, SCOPE_SINGLETON`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ChildBeanDefinition(ChildBeanDefinition original)` Create a new ChildBeanDefinition as deep copy of the given bean definition.
    `ChildBeanDefinition(String parentName)` Create a new ChildBeanDefinition for the given parent, to be configured through its bean properties and configuration methods.
    `ChildBeanDefinition(String parentName, Class<?> beanClass, ConstructorArgumentValues cargs, MutablePropertyValues pvs)` Create a new ChildBeanDefinition for the given parent, providing constructor arguments and property values.
    `ChildBeanDefinition(String parentName, ConstructorArgumentValues cargs, MutablePropertyValues pvs)` Create a new ChildBeanDefinition for the given parent.
    `ChildBeanDefinition(String parentName, MutablePropertyValues pvs)` Create a new ChildBeanDefinition for the given parent.
    `ChildBeanDefinition(String parentName, String beanClassName, ConstructorArgumentValues cargs, MutablePropertyValues pvs)` Create a new ChildBeanDefinition for the given parent, providing constructor arguments and property values.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `AbstractBeanDefinition` | `cloneBeanDefinition()` Clone this bean definition.
    `boolean` | `equals(Object other)`
    `String` | `getParentName()` Return the name of the parent definition of this bean definition, if any.
    `int` | `hashCode()`
    `void` | `setParentName(String parentName)` Set the name of the parent definition of this bean definition, if any.
    `String` | `toString()`
    `void` | `validate()` Validate this bean definition.

    - ### Methods inherited from class org.springframework.beans.factory.support.AbstractBeanDefinition

      `addQualifier, applyDefaults, clone, copyQualifiersFrom, getAutowireMode, getBeanClass, getBeanClassName, getConstructorArgumentValues, getDependencyCheck, getDependsOn, getDescription, getDestroyMethodName, getFactoryBeanName, getFactoryMethodName, getInitMethodName, getMethodOverrides, getOriginatingBeanDefinition, getPropertyValues, getQualifier, getQualifiers, getResolvedAutowireMode, getResource, getResourceDescription, getRole, getScope, hasBeanClass, hasConstructorArgumentValues, hasQualifier, isAbstract, isAutowireCandidate, isEnforceDestroyMethod, isEnforceInitMethod, isLazyInit, isLenientConstructorResolution, isNonPublicAccessAllowed, isPrimary, isPrototype, isSingleton, isSynthetic, overrideFrom, overrideFrom, prepareMethodOverride, prepareMethodOverrides, resolveBeanClass, setAbstract, setAutowireCandidate, setAutowireMode, setBeanClass, setBeanClassName, setConstructorArgumentValues, setDependencyCheck, setDependsOn, setDescription, setDestroyMethodName, setEnforceDestroyMethod, setEnforceInitMethod, setFactoryBeanName, setFactoryMethodName, setInitMethodName, setLazyInit, setLenientConstructorResolution, setMethodOverrides, setNonPublicAccessAllowed, setOriginatingBeanDefinition, setPrimary, setPropertyValues, setResource, setResourceDescription, setRole, setScope, setSingleton, setSynthetic`

    - ### Methods inherited from class org.springframework.beans.BeanMetadataAttributeAccessor

      `addMetadataAttribute, getAttribute, getMetadataAttribute, getSource, removeAttribute, setAttribute, setSource`

    - ### Methods inherited from class org.springframework.core.AttributeAccessorSupport

      `attributeNames, copyAttributesFrom, hasAttribute`

    - ### Methods inherited from class java.lang.Object

      `finalize, getClass, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface org.springframework.core.AttributeAccessor

      `attributeNames, getAttribute, hasAttribute, removeAttribute, setAttribute`

    - ### Methods inherited from interface org.springframework.beans.BeanMetadataElement

      `getSource`

- - ### Constructor Detail

    - #### ChildBeanDefinition

          public ChildBeanDefinition(String parentName)

      Create a new ChildBeanDefinition for the given parent, to be configured through its bean properties and configuration methods.
      Parameters:
        `parentName` - the name of the parent bean
      See Also:
        `AbstractBeanDefinition.setBeanClass(java.lang.Class<?>)`, `AbstractBeanDefinition.setBeanClassName(java.lang.String)`, `AbstractBeanDefinition.setScope(java.lang.String)`, `AbstractBeanDefinition.setAutowireMode(int)`, `AbstractBeanDefinition.setDependencyCheck(int)`, `AbstractBeanDefinition.setConstructorArgumentValues(org.springframework.beans.factory.config.ConstructorArgumentValues)`, `AbstractBeanDefinition.setPropertyValues(org.springframework.beans.MutablePropertyValues)`

    - #### ChildBeanDefinition

          public ChildBeanDefinition(String parentName,
                             MutablePropertyValues pvs)

      Create a new ChildBeanDefinition for the given parent.
      Parameters:
        `parentName` - the name of the parent bean
        `pvs` - the additional property values of the child

    - #### ChildBeanDefinition

          public ChildBeanDefinition(String parentName,
                             ConstructorArgumentValues cargs,
                             MutablePropertyValues pvs)

      Create a new ChildBeanDefinition for the given parent.
      Parameters:
        `parentName` - the name of the parent bean
        `cargs` - the constructor argument values to apply
        `pvs` - the additional property values of the child

    - #### ChildBeanDefinition

          public ChildBeanDefinition(String parentName,
                             Class<?> beanClass,
                             ConstructorArgumentValues cargs,
                             MutablePropertyValues pvs)

      Create a new ChildBeanDefinition for the given parent, providing constructor arguments and property values.
      Parameters:
        `parentName` - the name of the parent bean
        `beanClass` - the class of the bean to instantiate
        `cargs` - the constructor argument values to apply
        `pvs` - the property values to apply

    - #### ChildBeanDefinition

          public ChildBeanDefinition(String parentName,
                             String beanClassName,
                             ConstructorArgumentValues cargs,
                             MutablePropertyValues pvs)

      Create a new ChildBeanDefinition for the given parent, providing constructor arguments and property values. Takes a bean class name to avoid eager loading of the bean class.
      Parameters:
        `parentName` - the name of the parent bean
        `beanClassName` - the name of the class to instantiate
        `cargs` - the constructor argument values to apply
        `pvs` - the property values to apply

    - #### ChildBeanDefinition

          public ChildBeanDefinition(ChildBeanDefinition original)

      Create a new ChildBeanDefinition as deep copy of the given bean definition.
      Parameters:
        `original` - the original bean definition to copy from

  - ### Method Detail

    - #### setParentName

          public void setParentName(String parentName)

      Description copied from interface: `BeanDefinition`
      Set the name of the parent definition of this bean definition, if any.

    - #### getParentName

          public String getParentName()

      Description copied from interface: `BeanDefinition`
      Return the name of the parent definition of this bean definition, if any.

    - #### validate

          public void validate()
                        throws BeanDefinitionValidationException

      Description copied from class: `AbstractBeanDefinition`
      Validate this bean definition.
      Overrides:
        `validate` in class `AbstractBeanDefinition`
      Throws:
        `BeanDefinitionValidationException` - in case of validation failure

    - #### cloneBeanDefinition

          public AbstractBeanDefinition cloneBeanDefinition()

      Description copied from class: `AbstractBeanDefinition`
      Clone this bean definition. To be implemented by concrete subclasses.
      Specified by:
        `cloneBeanDefinition` in class `AbstractBeanDefinition`
      Returns:
        the cloned bean definition object

    - #### equals

          public boolean equals(Object other)

      Overrides:
        `equals` in class `AbstractBeanDefinition`

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `AbstractBeanDefinition`

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `AbstractBeanDefinition`