package com.xaccp.biz.service.power;

import java.util.*;

import com.xaccp.biz.po.*;

public abstract class PowerStrategyTemplate implements PowerStrategy {
	
	public Map buildPower(Collection powers, User user) {
		Map map = new HashMap();
		
		//首先檢測直接賦予用戶的權(quán)限
		for (Object obj : user.getTblUserPowers()) {
			UserPower up = (UserPower)obj;
			Power p = up.getTblPower();
			//@TODO 因?yàn)閯h除權(quán)限的時(shí)候沒有刪除關(guān)系,所以要加下面這一行
			if (p==null) continue;
			
			String shortName = p.getShortName();	//權(quán)限代號(hào)
			Integer state = up.getState();			//權(quán)限狀態(tài)
			
			processPower(map, shortName, state);
			
		}
		
		//然后檢測通過角色獲取的權(quán)限
		Set roles = buildRoleSet(user);
		for (Object role : roles) {
			Set rpSet = ((Role)role).getTblRolePowers();
			for (Object obj : rpSet) {
				RolePower up = (RolePower)obj;
				Power p = up.getTblPower();
				//@TODO 因?yàn)閯h除權(quán)限的時(shí)候沒有刪除關(guān)系,所以要加下面這一行
				if (p==null) continue;
				String shortName = p.getShortName();
				Integer state = up.getState();
				
				processPower(map, shortName, state);
			}
			
		}
		
		return map;
	}

	/**
	 * 構(gòu)建用戶擁有的角色集合
	 * 包含繼承自父類的角色
	 * @param user
	 * @return
	 */
	private Set buildRoleSet(User user) {
		Set roles = new HashSet();
		for (Object userRole : user.getTblUserRoles()) {
			addToRoleSet(roles, ((UserRole)userRole).getTblRole());
		}
		return roles;
	}
	
	private void addToRoleSet(Set roles, Role role) {
		
		//如果已經(jīng)存在當(dāng)前角色,返回
		if (roles.contains(role)) return;
		//加入當(dāng)前角色
		roles.add(role);
		System.out.println("嘗試獲取父類");
		try {
		//如果存在父類角色,處理父類角色
		if (role.getTblRole()!=null) addToRoleSet(roles, role.getTblRole());
		} catch(Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 模版中的回調(diào)函數(shù),負(fù)責(zé)判斷該權(quán)限是否應(yīng)該加入集合
	 * @param map
	 * @param shortName
	 * @param state
	 */
	protected abstract void processPower(Map map, String shortName, Integer state);

}