DwrNamespaceHandler.java 文件源码

private BeanDefinition findParentDefinition(String parentName, BeanDefinitionRegistry registry)
{   
    if (registry != null) 
    {
        if (registry.containsBeanDefinition(parentName)) 
        {
            return registry.getBeanDefinition(parentName);
        } 
        else if (registry instanceof HierarchicalBeanFactory) 
        {
            // Try to get parent definition from the parent BeanFactory. This could return null
            BeanFactory parentBeanFactory = ((HierarchicalBeanFactory)registry).getParentBeanFactory();
            return findParentDefinition(parentName, (BeanDefinitionRegistry)parentBeanFactory);
        } 
    }

    // we've exhausted all possibilities        
    return null;
}