savegroupaction.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.ArrayList;
import java.util.Enumeration;
import java.util.List;
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.ActionError;
import org.apache.struts.action.ActionErrors;
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.admin.AdminConstants;
import com.cyberdemia.cybertester.CyberTesterUtils;
import com.cyberdemia.cybertester.admin.AbstractAdminAction;
import com.cyberdemia.user.GroupData;
import com.cyberdemia.user.GroupManager;
import com.cyberdemia.user.GroupManagerHome;


/**
 * SaveGroupAction is a Struts action to save the values received from 
 * the group editor to either a new or existing group.
 * 
 * @author Alexander Yap
 * @version $Revision: 1.2 $ at $Date: 2004/05/29 17:30:32 $ by $Author: alexycyap $
 */
public class SaveGroupAction extends AbstractAdminAction
{
	protected ActionForward doPerform(
			ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response,
			HttpSession session) throws Exception	
	{
		// Was this transaction cancelled?
		if (isCancelled(request))
		{
			return mapping.findForward(Constants.SUCCESS);
		}

		Logger logger = CyberTesterUtils.getLogger();
		ActionErrors errors = new ActionErrors();
		// If submitted out of order, go to error page immediately.
		if (!isTokenValid(request))
		{
			errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("error.transaction.token"));
		}

		resetToken(request);
		if (errors.isEmpty())
		{
			GroupForm groupForm = (GroupForm)form;
			try
			{
				GroupManagerHome gMgrHome = CyberTesterUtils.getGroupManagerHome();
				GroupManager groupMgr = (GroupManager)gMgrHome.create();
				if (groupForm.isNew())
				{
					String hierId = (String)session.getAttribute(AdminConstants.SELECTED_HIERARCHY_ID_KEY);
					if (hierId==null)
					{
						errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("error.hierarchyNode.unselected"));
					}
					else
					{
						GroupData data = getGroupDataFromForm(groupForm, hierId);
						logger.log(Level.FINE, "Creating new group, name=\""+groupForm.getName()+"\".");
						groupMgr.addGroup(data, null);
					}
				}
				else
				{
					logger.log(Level.FINE, "Updating group "+groupForm.getName());
					groupMgr.setGroup(groupForm.getId(), groupForm.getName());
					List userToRemoveIdList = new ArrayList();
					Enumeration pEnum = request.getParameterNames();
					while (pEnum.hasMoreElements())
					{
						String pName = (String)pEnum.nextElement();
						if (pName.startsWith(REMOVE_PARAM_PREFIX) )
						{
							if ( "true".equals(request.getParameter(pName)) )
							{
								Integer userId = CyberTesterUtils.convertToInteger(pName.substring(REMOVE_PARAM_PREFIX.length()));
                                if (userId!=null)
                                {
                                	userToRemoveIdList.add(userId);
                                }
							}
						}
					}
					
					if (!userToRemoveIdList.isEmpty())
					{
						groupMgr.removeUsersFromGroup(groupForm.getId(), userToRemoveIdList);
					}
				}
			}
			catch (Exception ex)
			{
				logger.log( Level.SEVERE, "Error saving Group", ex);
				throw ex;
			}
			
		}
		
		if (!errors.isEmpty())
		{
			saveErrors(request, errors);
			return mapping.findForward(Constants.ERROR);
		}
		return mapping.findForward(Constants.SUCCESS);
	}

	private static GroupData getGroupDataFromForm(GroupForm groupForm, String hierId)
	{
		GroupData data = new GroupData(groupForm.getId(), hierId, groupForm.getName(), System.currentTimeMillis());
		return data;
	}
	
	private static final String REMOVE_PARAM_PREFIX = "remove_";	
}