Java tutorial
/** * File ./src/main/java/de/lemo/dms/processing/questions/QUserLogHistory.java * Lemo-Data-Management-Server for learning analytics. * Copyright (C) 2013 * Leonard Kappe, Andreas Pursian, Sebastian Schwarzrock, Boris Wenzlaff * * 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 3 of the License, or * 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. If not, see <http://www.gnu.org/licenses/>. **/ /** * File ./main/java/de/lemo/dms/processing/questions/QUserLogHistory.java * Date 2013-01-24 * Project Lemo Learning Analytics */ package de.lemo.dms.processing.questions; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.ws.rs.FormParam; import javax.ws.rs.POST; import javax.ws.rs.Path; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.criterion.Restrictions; import de.lemo.dms.core.config.ServerConfiguration; import de.lemo.dms.db.IDBHandler; import de.lemo.dms.db.mapping.AssignmentLogMining; import de.lemo.dms.db.mapping.ForumLogMining; import de.lemo.dms.db.mapping.QuestionLogMining; import de.lemo.dms.db.mapping.QuizLogMining; import de.lemo.dms.db.mapping.ResourceLogMining; import de.lemo.dms.db.mapping.ScormLogMining; import de.lemo.dms.db.mapping.WikiLogMining; import de.lemo.dms.db.mapping.abstractions.ILogMining; import de.lemo.dms.processing.MetaParam; import de.lemo.dms.processing.Question; import de.lemo.dms.processing.StudentHelper; import de.lemo.dms.processing.resulttype.ResultListUserLogObject; import de.lemo.dms.processing.resulttype.UserLogObject; /** * Look up for spezial log events * @author Sebastian Schwarzrock * */ @Path("userloghistory") public class QUserLogHistory extends Question { /** * Returns all logged events matching the requirements given by the parameters. * * @param courses * List of course-identifiers * @param users * List of user-identifiers * @param startTime * LongInteger time stamp * @param endTime * LongInteger time stamp * @return */ @SuppressWarnings("unchecked") @POST public ResultListUserLogObject compute(@FormParam(MetaParam.COURSE_IDS) final List<Long> courses, @FormParam(MetaParam.USER_IDS) List<Long> users, @FormParam(MetaParam.START_TIME) final Long startTime, @FormParam(MetaParam.END_TIME) final Long endTime, @FormParam(MetaParam.GENDER) final List<Long> gender) { validateTimestamps(startTime, endTime); final IDBHandler dbHandler = ServerConfiguration.getInstance().getMiningDbHandler(); final Session session = dbHandler.getMiningSession(); Criteria criteria; if (users == null || users.size() == 0) { users = new ArrayList<Long>(StudentHelper.getCourseStudentsAliasKeys(courses, gender).values()); } else { Map<Long, Long> userMap = StudentHelper.getCourseStudentsAliasKeys(courses, gender); List<Long> tmp = new ArrayList<Long>(); for (int i = 0; i < users.size(); i++) { tmp.add(userMap.get(users.get(i))); } users = tmp; } criteria = session.createCriteria(ILogMining.class, "log"); criteria.add(Restrictions.between("log.timestamp", startTime, endTime)); if (users != null && users.size() > 0) criteria.add(Restrictions.in("log.user.id", users)); if ((courses != null) && (courses.size() > 0)) { criteria.add(Restrictions.in("log.course.id", courses)); } final List<ILogMining> logs = criteria.list(); // HashMap for all user-histories final HashMap<Long, List<UserLogObject>> userPaths = new HashMap<Long, List<UserLogObject>>(); // Iterate through all found log-items for saving log data into UserPathObjects for (int i = 0; i < logs.size(); i++) { String title = ""; String type = ""; ILogMining ilm = null; // the log entry has to be cast to its respective class to get its title if (logs.get(i).getClass().equals(AssignmentLogMining.class) && (((AssignmentLogMining) logs.get(i)).getAssignment() != null)) { ilm = logs.get(i); type = "assignment"; title = ((AssignmentLogMining) ilm).getAssignment().getTitle(); } if (logs.get(i).getClass().equals(ForumLogMining.class) && (((ForumLogMining) logs.get(i)).getForum() != null)) { ilm = logs.get(i); type = "forum"; title = ((ForumLogMining) ilm).getForum().getTitle(); } if (logs.get(i).getClass().equals(QuizLogMining.class) && (((QuizLogMining) logs.get(i)).getQuiz() != null)) { ilm = logs.get(i); type = "quiz"; title = ((QuizLogMining) ilm).getQuiz().getTitle(); } if (logs.get(i).getClass().equals(QuestionLogMining.class) && (((QuestionLogMining) logs.get(i)).getQuestion() != null)) { ilm = logs.get(i); type = "question"; title = ((QuestionLogMining) ilm).getQuestion().getTitle(); } if (logs.get(i).getClass().equals(ResourceLogMining.class) && (((ResourceLogMining) logs.get(i)).getResource() != null)) { ilm = logs.get(i); type = "resource"; title = ((ResourceLogMining) ilm).getResource().getTitle(); } if (logs.get(i).getClass().equals(WikiLogMining.class) && (((WikiLogMining) logs.get(i)).getWiki() != null)) { ilm = logs.get(i); type = "wiki"; title = ((WikiLogMining) ilm).getWiki().getTitle(); } if (logs.get(i).getClass().equals(ScormLogMining.class) && (((ScormLogMining) logs.get(i)).getScorm() != null)) { ilm = logs.get(i); type = "scorm"; title = ((ScormLogMining) ilm).getScorm().getTitle(); } if (ilm != null) { if (userPaths.get(logs.get(i).getUser().getId()) == null) { final ArrayList<UserLogObject> uP = new ArrayList<UserLogObject>(); // If the user isn't already in the map, create new entry and insert the UserPathObject uP.add(new UserLogObject(ilm.getUser().getId(), ilm.getTimestamp(), title, ilm.getId(), type, ilm.getCourse().getId(), "")); userPaths.put(logs.get(i).getUser().getId(), uP); } else { // If the user is known, just add the UserPathObject to the user's history userPaths.get(ilm.getUser().getId()).add(new UserLogObject(ilm.getUser().getId(), ilm.getTimestamp(), title, ilm.getId(), type, ilm.getCourse().getId(), "")); } } } // List for UserPathObjects final List<UserLogObject> l = new ArrayList<UserLogObject>(); // Insert all entries of all user-histories to the list for (final Iterator<List<UserLogObject>> iter = userPaths.values().iterator(); iter.hasNext();) { l.addAll(iter.next()); } // Sort the list (first by user and time stamp) Collections.sort(l); for (int i = 0; i < l.size(); i++) { logger.debug(l.get(i).getType()); } final ResultListUserLogObject rlupo = new ResultListUserLogObject(l); session.close(); return rlupo; } }