org.springframework.beans.factory.support
Class BeanDefinitionValueResolver

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

public class BeanDefinitionValueResolver
extends Object

Helper class for use by BeanFactory implementations, resolving values contained in BeanDefinition objects into the actual values applied to th target bean instance.

Works on an AbstractBeanFactory and a plain BeanDefinition object. Used by AbstractAutowireCapableBeanFactory.

Since:

1.2

Author:

Juergen Hoeller

See Also:

AbstractAutowireCapableBeanFactory

Field Summary

protected Log

logger

Constructor Summary

BeanDefinitionValueResolver(AbstractBeanFactory beanFactory, String beanName, BeanDefinition beanDefinition)
Create a new BeanDefinitionValueResolver for the given BeanFactory and BeanDefinition.

Method Summary

Object

resolveValueIfNecessary(String argName, Object value) Given a PropertyValue, return a value, resolving any references to other beans in the factory if necessary.

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final Log logger

Constructor Detail

BeanDefinitionValueResolver

public BeanDefinitionValueResolver(AbstractBeanFactory beanFactory,
                                   String beanName,
                                   BeanDefinition beanDefinition)

Create a new BeanDefinitionValueResolver for the given BeanFactory and BeanDefinition.

Parameters:

beanFactory - the BeanFactory to resolve against

beanName - the name of the bean that we work on

beanDefinition - the BeanDefinition of the bean that we work on

Method Detail

resolveValueIfNecessary

public Object resolveValueIfNecessary(String argName,
                                      Object value)
                               throws BeansException

Given a PropertyValue, return a value, resolving any references to other beans in the factory if necessary. The value could be:

A BeanDefinition, which leads to the creation of a corresponding new bean instance. Singleton flags and names of such "inner beans" are always ignored: Inner beans are anonymous prototypes.

A RuntimeBeanReference, which must be resolved.

A ManagedList. This is a special collection that may contain RuntimeBeanReferences or Collections that will need to be resolved.

A ManagedSet. May also contain RuntimeBeanReferences or Collections that will need to be resolved.

A ManagedMap. In this case the value may be a RuntimeBeanReference or Collection that will need to be resolved.

An ordinary object or null, in which case it's left alone.

Throws:

BeansException