org.unitime.timetable.dataexchange.TravelTimesExport.java Source code

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Here is the source code for org.unitime.timetable.dataexchange.TravelTimesExport.java

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/*
 * UniTime 3.4 - 3.5 (University Timetabling Application)
 * Copyright (C) 2012 - 2013, UniTime LLC, and individual contributors
 * as indicated by the @authors tag.
 * 
 * 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
 * (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.  If not, see <http://www.gnu.org/licenses/>.
 * 
*/
package org.unitime.timetable.dataexchange;

import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import org.dom4j.Document;
import org.dom4j.Element;
import org.unitime.timetable.model.Location;
import org.unitime.timetable.model.Room;
import org.unitime.timetable.model.Session;
import org.unitime.timetable.model.TravelTime;

/**
 * @author Tomas Muller
 */
public class TravelTimesExport extends BaseExport {

    @Override
    public void saveXml(Document document, Session session, Properties parameters) throws Exception {
        try {
            beginTransaction();

            Element root = document.addElement("traveltimes");
            root.addAttribute("campus", session.getAcademicInitiative());
            root.addAttribute("year", session.getAcademicYear());
            root.addAttribute("term", session.getAcademicTerm());
            root.addAttribute("created", new Date().toString());

            document.addDocType("traveltimes", "-//UniTime//UniTime Travel Times DTD/EN",
                    "http://www.unitime.org/interface/TravelTimes.dtd");

            Map<Long, Map<Long, Integer>> matrix = new HashMap<Long, Map<Long, Integer>>();
            for (TravelTime travel : (List<TravelTime>) getHibSession()
                    .createQuery("from TravelTime where session.uniqueId = :sessionId")
                    .setLong("sessionId", session.getUniqueId()).list()) {
                Map<Long, Integer> m = matrix.get(travel.getLocation1Id());
                if (m == null) {
                    m = new HashMap<Long, Integer>();
                    matrix.put(travel.getLocation1Id(), m);
                }
                m.put(travel.getLocation2Id(), travel.getDistance());
            }

            List<Location> locations = Location.findAll(session.getUniqueId());
            Collections.sort(locations);

            for (Location from : locations) {
                Map<Long, Integer> m = matrix.get(from.getUniqueId());
                if (m == null || m.isEmpty())
                    continue;
                Element fromEl = root.addElement("from");
                fillLocationData(from, fromEl);
                for (Location to : locations) {
                    Integer distance = m.get(to.getUniqueId());
                    if (distance == null)
                        continue;
                    Element toEl = fromEl.addElement("to");
                    fillLocationData(to, toEl);
                    toEl.setText(distance.toString());
                }
            }

            commitTransaction();
        } catch (Exception e) {
            fatal("Exception: " + e.getMessage(), e);
            rollbackTransaction();
        }
    }

    private void fillLocationData(Location location, Element element) {
        if (location instanceof Room) {
            Room room = (Room) location;
            element.addAttribute("building", room.getBuilding().getAbbreviation());
            element.addAttribute("roomNbr", room.getRoomNumber());
        } else {
            element.addAttribute("name", location.getLabel());
        }
        if (location.getExternalUniqueId() != null && !location.getExternalUniqueId().isEmpty())
            element.addAttribute("id", location.getExternalUniqueId());
    }

}