BeanExtender.java 文件源码

/**
 * @see org.springframework.beans.factory.config.BeanFactoryPostProcessor#postProcessBeanFactory(org.springframework.beans.factory.config.ConfigurableListableBeanFactory)
 */
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
{
    ParameterCheck.mandatory("beanName", beanName);
    ParameterCheck.mandatory("extendingBeanName", extendingBeanName);

    // check for bean name
    if (!beanFactory.containsBean(beanName))
    {
        throw new NoSuchBeanDefinitionException("Can't find bean '" + beanName + "' to be extended.");
    }

    // check for extending bean
    if (!beanFactory.containsBean(extendingBeanName))
    {
        throw new NoSuchBeanDefinitionException("Can't find bean '" + extendingBeanName + "' that is going to extend original bean definition.");
    }

    // get the bean definitions
    BeanDefinition beanDefinition = beanFactory.getBeanDefinition(beanName);
    BeanDefinition extendingBeanDefinition = beanFactory.getBeanDefinition(extendingBeanName);

    // update class
    if (StringUtils.isNotBlank(extendingBeanDefinition.getBeanClassName()) &&
        !beanDefinition.getBeanClassName().equals(extendingBeanDefinition.getBeanClassName()))
    {
        beanDefinition.setBeanClassName(extendingBeanDefinition.getBeanClassName());
    }

    // update properties
    MutablePropertyValues properties = beanDefinition.getPropertyValues();
    MutablePropertyValues extendingProperties = extendingBeanDefinition.getPropertyValues();
    for (PropertyValue propertyValue : extendingProperties.getPropertyValueList())
    {
        properties.add(propertyValue.getName(), propertyValue.getValue());
    }
}