package com.huaao.factory;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

import com.huaao.annotation.AutoInject;
import com.huaao.service.TestService;

public final class BeanFactory {

	private static BeanFactory factory = new BeanFactory();
	
	private BeanFactory(){
		
	}
	public static BeanFactory getBeanFactory(){
		return factory;
	}
	public Object getBean(Class clazz)throws Exception{
		Field[] fields = clazz.getDeclaredFields();
		Object instance = clazz.newInstance();
		for(Field filed : fields){
			if(filed.isAnnotationPresent(AutoInject.class)){
				AutoInject inject = filed.getAnnotation(AutoInject.class);
				String className = inject.name();
				String filedName = filed.getName();
				Object target = Class.forName(className).newInstance();
				Method setMethod = clazz.getMethod("set"+filedName.substring(0,1).toUpperCase()+filedName.substring(1),filed.getType());
				setMethod.invoke(instance, target);
			}
		}
		return instance;
	}
	public static void main(String[] args)throws Exception {
		((TestService)BeanFactory.getBeanFactory().getBean(TestService.class)).test();
	}

}