package com.spring.processor;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import com.spring.bean.PersonBean;
/**
* 允许在正常的BeanFactoryPostProcessor检测开始之前注册更多的自定义bean。
* 特别是，BeanDefinitionRegistryPostProcessor可以注册更多的bean定义，然后定义BeanFactoryPostProcessor实例。
* 也就是说可以借此方法实现自定义的bean。
*
*/
public class CustomBeanDefinitionRegistryPostProcessor implements BeanDefinitionRegistryPostProcessor {
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
}
@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
System.out.println("postProcessBeanDefinitionRegistry");
Class<?> cls = PersonBean.class;
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(cls);
GenericBeanDefinition definition = (GenericBeanDefinition) builder.getRawBeanDefinition();
definition.setAutowireMode(GenericBeanDefinition.AUTOWIRE_BY_TYPE);
definition.getPropertyValues().add("name", "pepsi02");
// 注册bean名,一般为类名首字母小写
registry.registerBeanDefinition("person2", definition);
BeanDefinition beanDefinition = registry.getBeanDefinition("person1");
System.out.println("postProcessBeanDefinitionRegistry修改属性name值");
beanDefinition.getPropertyValues().add("name", "tom");
}
}
