TimeWindow.java

package org.kisst.util;

import java.util.Calendar;


public class TimeWindow {
	private final int startHour;
	private final int startMinute;
	private final int endHour;
	private final int endMinute;
	private final int dayOfWeek;
	
	public TimeWindow(String window) {
		int pos=window.indexOf("!");
		if (pos<0)
			dayOfWeek=-1;
		else if (pos==2) {
			dayOfWeek=getDayOfWeek(window.substring(0,2));
			window=window.substring(3);
		}
		else
			throw new RuntimeException("TimeWindow may only contain two letter day of week name before exclamation mark "+window);
		String[] parts=window.split("-");
		if (parts.length!=2)
			throw new IllegalArgumentException("time window string ["+window+"] should contain exactly one - symbol");
		startHour=getHour(parts[0]);
		startMinute=getMinute(parts[0]);
		endHour=getHour(parts[1]);
		endMinute=getMinute(parts[1]);
		if (startHour>endHour)
			throw new IllegalArgumentException("Time interval "+this+" should not have higher start hour than end hour");
		if (startHour==endHour && startMinute>endMinute)
			throw new IllegalArgumentException("Time interval "+this+" should not have higher start time than end time");
		
	}

	private int getDayOfWeek(String str) {
		str=str.toLowerCase();
		if ("su".equals(str)) return Calendar.SUNDAY;
		if ("mo".equals(str)) return Calendar.MONDAY;
		if ("tu".equals(str)) return Calendar.TUESDAY;
		if ("we".equals(str)) return Calendar.WEDNESDAY;
		if ("th".equals(str)) return Calendar.THURSDAY;
		if ("fr".equals(str)) return Calendar.FRIDAY;
		if ("sa".equals(str)) return Calendar.SATURDAY;

		if ("zo".equals(str)) return Calendar.SUNDAY;
		if ("ma".equals(str)) return Calendar.MONDAY;
		if ("di".equals(str)) return Calendar.TUESDAY;
		if ("wo".equals(str)) return Calendar.WEDNESDAY;
		if ("do".equals(str)) return Calendar.THURSDAY;
		if ("vr".equals(str)) return Calendar.FRIDAY;
		if ("za".equals(str)) return Calendar.SATURDAY;
		
		throw new RuntimeException("Unknown day of week "+str);
	}

	public String toString() { return startHour+":"+startMinute+"-"+endHour+":"+endMinute; }
	
	public boolean isTimeInWindow(int dow, int hour, int minute) {
		if (dayOfWeek>0)
			if (dow!=dayOfWeek)
				return false;
		if (hour<startHour || hour>endHour)
			return false;
		if (hour>startHour || minute>=startMinute)
			if (hour<endHour || minute<=endMinute)
				return true;
		return false;
	}
	
	private int getHour(String time) {
		String[] parts=time.split(":");
		if (parts.length!=2)
			throw new IllegalArgumentException("time string ["+time+"] should contain exactly one : symbol");
		return Integer.parseInt(parts[0].trim());
	}
	private int getMinute(String time) {
		String[] parts=time.split(":");
		if (parts.length!=2)
			throw new IllegalArgumentException("time string ["+time+"] should contain exactly one : symbol");
		return Integer.parseInt(parts[1].trim());
	}
}