openremote calendar class

package org.openremote.controller.protocol;

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Collection;
import net.fortuna.ical4j.data.CalendarBuilder;
import net.fortuna.ical4j.data.ParserException;
import net.fortuna.ical4j.filter.Filter;
import net.fortuna.ical4j.filter.PeriodRule;
import net.fortuna.ical4j.filter.Rule;
import net.fortuna.ical4j.model.Calendar;
import net.fortuna.ical4j.model.Component;
import net.fortuna.ical4j.model.DateTime;
import net.fortuna.ical4j.model.Dur;
import net.fortuna.ical4j.model.Period;
import net.fortuna.ical4j.model.component.VEvent;

/**
 * This is a sample class to launch a rule.
 */
public class CalendarProvider {

    public static Calendar calendar;
    public static Object calendarLock = new Object();
    //private static CalendarWatcher watcher;

    public static void loadCalendar(String calendarPath) throws IOException, ParserException {
        synchronized(calendarLock) {
            FileInputStream fin = new FileInputStream(calendarPath);
            CalendarBuilder builder = new CalendarBuilder();
            calendar = builder.build(fin);
        }
    }

    public static float getCalendarTemperature(final String calendarPath) {
        try {
            if (calendar == null) {
                loadCalendar(calendarPath);
            }
            java.util.Calendar today = java.util.Calendar.getInstance();

            Period period = new Period(new DateTime(today.getTime()), new Dur(0, 0, 1, 0));
            Filter filter = new Filter(new Rule[] {new PeriodRule(period)}, Filter.MATCH_ALL);

            synchronized(calendarLock) {
                @SuppressWarnings("rawtypes")
                Collection eventsToday = filter.filter(calendar.getComponents(Component.VEVENT));

                for (Object o : eventsToday) {
                    VEvent event = (VEvent) o;
                    try {
                          float value = Float.parseFloat(event.getDescription().getValue());
                          return value;
                      } catch (Exception e) { }
                }
            }
        } catch (Exception e) {
            System.out.println(e.toString());
        }

        return -1;
    }
}