package com.co.lane.util;

import java.io.File;
import java.util.HashMap;
import java.util.Map;

import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;

/**
 * <ul>
 * <li>系统上下文配置文件(web.xml)</li>
 * <li>系统配置文件载入(hrms.xml)</li>
 * <li>各个页面的配置文件(e.g:EmpUpdateItem.xml)</li>
 * </ul>
 */
public class ConfigUtilHelper {
	
	/**
	 * 配置文件容器，来一个放一个
	 * key 配置文件名
	 */
	private static Map<String, ConfigUtil> mapConfig = new HashMap<String, ConfigUtil>();
	
	/**
	 * private constructor
	 */
	private ConfigUtilHelper() {}
	
	/**
	 * 载入配置文件
	 * Config_Page:WEB-INF/classes/config/
	 * 
	 * @param configFileName
	 */
	public static ConfigUtil load(String configFileName) {
		String fileName = StringUtil.getFileName(configFileName);
		if(mapConfig.containsKey(fileName)){
			return mapConfig.get(fileName);
		}
		ConfigUtil hrmsConfig = loadPro(configFileName);
		mapConfig.put(fileName, hrmsConfig);
		return hrmsConfig;
	}
	
	/**
	 * 卸载配置文件
	 * 
	 * @param configFileName
	 */
	public static void unLoad(String configFileName) {
		String fileName = StringUtil.getFileName(configFileName);
		if(mapConfig.containsKey(fileName)){
			mapConfig.remove(fileName);
		}
	}
	
	/**
	 * 加载配置文件
	 * 
	 * @param configFileName 文件名称
	 * @return HrmsConfig
	 */
	private static ConfigUtil loadPro(String configFileName) {
		ConfigUtil hrmsConfig = new ConfigUtil();
		String filePath = configFileName;
		File file = new File(filePath);
		SAXReader saxReader = new SAXReader();
		try {
			org.dom4j.Document doc = saxReader.read(file);
			hrmsConfig.setDoc(doc);
		} catch (DocumentException e) {
//			logger.error("system config file load failed!(" + configFileName + ")");
//			logger.error(e.getMessage());
			e.printStackTrace();
		}
		return hrmsConfig;
	}

	// ========================= TEST ==========================================
	
//	public static void main(String[] args){
//		String coifigFilePath = "E:/Loudy/VssPro/40JaveEnv/PosPrint/RF/3.xml";
//		ConfigUtil configUtil = ConfigUtilHelper.load(coifigFilePath);
//		java.util.List<com.co.lane.print.ConfigDataItem> items = configUtil.getListByXPath(com.co.lane.print.ConfigDataItem.class, "/PrintMode/General/Item");
//		for(com.co.lane.print.ConfigDataItem item : items){
//			System.out.println(item.getID());
//			System.out.println(item.getTitle());
//			System.out.println(item.getField());
//			System.out.println(item.getType());
//			System.out.println(item.getRow());
//			System.out.println(item.getWidth());
//			System.out.println(item.getColumn());
//			System.out.println(item.getAlignment());
//		}
//	}
	
}