package com.haha.action;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class ActionFactory {
	private static Map<String, AbsMyStrutsAction> map=null;
	//初始化
	private static void init(){
		try {
			SAXReader sr = new SAXReader();
			Document doc = sr.read(ActionFactory.class.getResource("/actions.xml"));
			
			List<Element> list=doc.selectNodes("/beans/bean");
			for(Element el:list){
				//获取name属性
				String name=el.attributeValue("name");
				//获取class属性
				String clsName=el.attributeValue("class");
				//创建一个Action对象
				AbsMyStrutsAction action=createAction(clsName);
				if(action!=null){
					map.put(name, action);
				}
			}
			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	//根据类名创建一个Action
	private static AbsMyStrutsAction createAction(String clsName) {
		try {
			Class cls = Class.forName(clsName);
			return (AbsMyStrutsAction) cls.newInstance();
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}
	//根据名字获取一个Action
	public static AbsMyStrutsAction getAction(String name){
		if(map==null){
			map=new HashMap<String, AbsMyStrutsAction>();
			init();
		}
		if(map.containsKey(name)){
			return map.get(name);
		}
		return null;
	}
}