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package cn.hippo4j.common.config;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import java.lang.annotation.Annotation;
import java.util.Map;

/**
 * Application context holder.
 *
 * @author chen.ma
 * @date 2021/6/20 18:49
 */
public class ApplicationContextHolder implements ApplicationContextAware {

    private static ApplicationContext CONTEXT;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        ApplicationContextHolder.CONTEXT = applicationContext;
    }

    /**
     * Get ioc container bean by type.
     *
     * @param clazz
     * @param 
     * @return
     */
    public static  T getBean(Class clazz) {
        return CONTEXT.getBean(clazz);
    }

    /**
     * Get ioc container bean by name and type.
     *
     * @param name
     * @param clazz
     * @param 
     * @return
     */
    public static  T getBean(String name, Class clazz) {
        return CONTEXT.getBean(name, clazz);
    }

    /**
     * Get a set of ioc container beans by type.
     *
     * @param clazz
     * @param 
     * @return
     */
    public static  Map getBeansOfType(Class clazz) {
        return CONTEXT.getBeansOfType(clazz);
    }

    /**
     * Find whether the bean has annotations.
     *
     * @param beanName
     * @param annotationType
     * @param 
     * @return
     */
    public static  A findAnnotationOnBean(String beanName, Class annotationType) {
        return CONTEXT.findAnnotationOnBean(beanName, annotationType);
    }

    /**
     * Get ApplicationContext.
     *
     * @return
     */
    public static ApplicationContext getInstance() {
        return CONTEXT;
    }

}




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