/*
 * Created on Dec 26, 2003 by jpvl
 *  
 */
package net.sourceforge.fenixedu.util.date;

import java.util.Calendar;
import java.util.Date;

import net.sourceforge.fenixedu.util.FenixUtil;

/**
 * @author jpvl
 */
public class TimePeriod extends FenixUtil {
    private long start;

    private long end;

    public TimePeriod(long start, long end) {
	this.start = start;
	this.end = end;
    }

    /**
     *  
     */
    public TimePeriod(Date start, Date end) {
	this(start.getTime(), end.getTime());
    }

    public TimePeriod(Calendar start, Calendar end) {
	this(start.getTimeInMillis(), end.getTimeInMillis());
    }

    public Double hours() {

	Calendar endCalendar = Calendar.getInstance();
	endCalendar.setTimeInMillis(this.end);

	Calendar startCalendar = Calendar.getInstance();
	startCalendar.setTimeInMillis(start);

	int endMinutes = endCalendar.get(Calendar.MINUTE);
	int startMinutes = startCalendar.get(Calendar.MINUTE);

	endCalendar.roll(Calendar.HOUR_OF_DAY, -(startCalendar.get(Calendar.HOUR_OF_DAY)));
	endCalendar.roll(Calendar.MINUTE, -(startCalendar.get(Calendar.MINUTE)));

	int minutes = endCalendar.get(Calendar.MINUTE);
	int hours = endMinutes < startMinutes ? endCalendar.get(Calendar.HOUR_OF_DAY) - 1 : endCalendar.get(Calendar.HOUR_OF_DAY);

	double minutesInHours = minutes / 60.0;
	return Double.valueOf(hours + minutesInHours);
    }
}