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package com.vci.client.uif.engine.common;
 
import java.util.HashMap;
import java.util.Map;
 
import com.vci.client.common.objects.UserObject;
import com.vci.client.framework.delegate.RightManagementClientDelegate;
import com.vci.client.ui.exception.VCIException;
 
public class UserObjectMap {
    private static UserObjectMap _instance = null;
    public static UserObjectMap getInstance(){
        if(_instance == null){
            synchronized (UserObjectMap.class) {
                if(_instance == null){
                    _instance = new UserObjectMap();
                }
            }
        }
        return _instance;
    }
    
    private Map<String, UserObject> userMap = new HashMap<String, UserObject>();
    
    public UserObject getUserObjectByName(String userName){
        UserObject userObject = null;
        
        if(userMap.containsKey(userName)){
            userObject = userMap.get(userName);
        } else {
            userObject = getUserObjectFromDB(userName);
            if(userObject != null){
                userMap.put(userName, userObject);
            }
        }
 
        return userObject;
    }
    
    private UserObject getUserObjectFromDB(String userName){
        UserObject userObj = null;
        try {
            userObj = new RightManagementClientDelegate().getUserObjectByUserName(userName);
        } catch (VCIException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return userObj;
    }
}