getusersaction.java

老外的在线考试

/*
 * CyberTester - J2EE Web application for creating, delivering and managing tests/exams/surveys. 
 * Copyright (C) 2004 CyberDemia Research and Services Pty Ltd
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program (see the file COPYING); if not, write to the
 * Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * See the COPYING file located in the top-level-directory of
 * the archive of this program for complete text of license.
 */
package com.cyberdemia.cybertester.admin.user;

import java.util.HashSet;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.cyberdemia.cybertester.Constants;
import com.cyberdemia.cybertester.CyberTesterUtils;
import com.cyberdemia.cybertester.admin.AbstractAdminAction;
import com.cyberdemia.cybertester.admin.AdminConstants;
import com.cyberdemia.user.UserData;
import com.cyberdemia.user.UserManager;
import com.cyberdemia.user.UserManagerHome;

/**
 * 
 * GetUsersAction is a Struts action to search for users based on search
 * criteria such as last name or email, and load the matching users' data.
 *  
 * @version $Revision: 1.6 $ at $Date: 2004/06/05 14:58:07 $ by $Author: alexycyap $
 * @author Alexander Yap
 */
public final class GetUsersAction extends AbstractAdminAction
{
	protected ActionForward doPerform(
		ActionMapping mapping, ActionForm form,
		HttpServletRequest request, HttpServletResponse response,
		HttpSession session) throws Exception
	{
		Logger logger = CyberTesterUtils.getLogger();
		String searchTarget = CyberTesterUtils.getParameterOrRequestAttribute(request, AdminConstants.SEARCH_TARGET_KEY);
		Set userSet = new HashSet();
		if ((searchTarget!=null) && (searchTarget.trim().length()>0))
		{
			request.setAttribute(AdminConstants.SEARCH_TARGET_KEY,searchTarget);
			logger.log( Level.FINE, "Searching users for target "+searchTarget);
			try
			{
				searchForUsers( searchTarget, userSet);
			}
			catch (Exception ex)
			{
				logger.log( Level.WARNING, "Error searching users.", ex);
			}
		}
		else
		{
			request.setAttribute(AdminConstants.SEARCH_TARGET_KEY,"");
		}
		
		
		request.setAttribute( AdminConstants.USER_LIST_KEY, userSet );
			
		return mapping.findForward(Constants.SUCCESS);
	}
	
	static void searchForUsers(String searchTarget, Set resultSet) throws Exception
	{
		searchTarget = searchTarget.trim();
		UserManagerHome uMgrHome = CyberTesterUtils.getUserManagerHome();
		UserManager userMgr = (UserManager)uMgrHome.create();
		UserData[] userList1 = userMgr.searchUsersByLogin(searchTarget, Constants.MAX_SEARCH_RESULT_PAGE_SIZE, true);
		UserData[] userList2 = userMgr.searchUsersByLastName(searchTarget, Constants.MAX_SEARCH_RESULT_PAGE_SIZE, true);
		for (int u=0; u<userList1.length; u++)
		{
			if (resultSet.size()==Constants.MAX_SEARCH_RESULT_PAGE_SIZE)
			{
				break;
			}
			resultSet.add(userList1[u]);
		}
		
		for (int u=0; u<userList2.length; u++)
		{
			if (resultSet.size()==Constants.MAX_SEARCH_RESULT_PAGE_SIZE)
			{
				break;
			}
			resultSet.add(userList2[u]);
		}		
	}
	
}