com.jeesuite.spring.SpringInstanceProvider Maven / Gradle / Ivy
package com.jeesuite.spring;
import java.util.Map;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class SpringInstanceProvider {
private ApplicationContext applicationContext;
/**
* 以一批spring配置文件的路径初始化spring实例提供者。
* @param locations spring配置文件的路径的集合。spring将从类路径开始获取这批资源文件。
*/
public SpringInstanceProvider(String... locations) {
applicationContext = new ClassPathXmlApplicationContext(locations);
}
/**
* 从ApplicationContext生成SpringProvider
* @param applicationContext
*/
public SpringInstanceProvider(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
/**
* 根据一批Spring配置文件初始化spring实例提供者。
* @param annotatedClasses
*/
public SpringInstanceProvider(Class... annotatedClasses) {
applicationContext = new AnnotationConfigApplicationContext(
annotatedClasses);
}
/**
* 返回指定类型的实例。
* @param beanClass 实例的类型
* @return 指定类型的实例。
*/
@SuppressWarnings("unchecked")
public T getInstance(Class beanClass) {
String[] beanNames = applicationContext.getBeanNamesForType(beanClass);
if (beanNames.length == 0) {
return null;
}
return (T) applicationContext.getBean(beanNames[0]);
}
public T getInstance(Class beanClass, String beanName) {
return (T) applicationContext.getBean(beanName, beanClass);
}
@SuppressWarnings("unchecked")
public T getByBeanName(String beanName) {
return (T) applicationContext.getBean(beanName);
}
@SuppressWarnings("unchecked")
public T getInstance(String beanName) {
return (T) applicationContext.getBean(beanName);
}
public int getInterfaceCount(Class beanClass) {
return applicationContext.getBeanNamesForType(beanClass).length;
}
public Map getInterfaces(Class beanClass) {
return applicationContext.getBeansOfType(beanClass);
}
}