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package io.github.wj0410.cloudbox.tools.util;

import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;

/**
 * spring工具类 方便在非spring管理环境中获取bean
 *
 * @author wangjie
 */
public final class SpringUtils implements BeanFactoryPostProcessor {
    /**
     * Spring应用上下文环境
     */
    private static ConfigurableListableBeanFactory beanFactory;

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        SpringUtils.beanFactory = beanFactory;
    }

    /**
     * 获取对象
     *
     * @param name name
     * @param   T
     * @return T
     * @throws BeansException BeansException
     */
    @SuppressWarnings("unchecked")
    public static  T getBean(String name) throws BeansException {
        return (T) beanFactory.getBean(name);
    }

    /**
     * 获取类型为requiredType的对象
     *
     * @param clz clz
     * @param  T
     * @return T
     * @throws BeansException BeansException
     */
    public static  T getBean(Class clz) throws BeansException {
        T result = (T) beanFactory.getBean(clz);
        return result;
    }

    /**
     * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
     *
     * @param name name
     * @return boolean
     */
    public static boolean containsBean(String name) {
        return beanFactory.containsBean(name);
    }

    /**
     * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
     *
     * @param name name
     * @return boolean
     * @throws NoSuchBeanDefinitionException NoSuchBeanDefinitionException
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.isSingleton(name);
    }

    /**
     * @param name name
     * @return Class 注册对象的类型
     * @throws NoSuchBeanDefinitionException NoSuchBeanDefinitionException
     */
    public static Class getType(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.getType(name);
    }

    /**
     * 如果给定的bean名字在bean定义中有别名，则返回这些别名
     *
     * @param name name
     * @return String[]
     * @throws NoSuchBeanDefinitionException NoSuchBeanDefinitionException
     */
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.getAliases(name);
    }

    /**
     * 获取aop代理对象
     *
     * @param invoker invoker
     * @param      T
     * @return T
     */
    @SuppressWarnings("unchecked")
    public static  T getAopProxy(T invoker) {
        return (T) AopContext.currentProxy();
    }
}