public static void main(String args[]) throws ParseException {
/*Random random = new Random();
System.out.println("{");
for( int i = 0 ; i<300 ; i++ )
{
System.out.println("{"+i + ","+ (i+Math.abs(random.nextInt())%20+1)+"},");
}
System.out.println("}");
*/
/*
for( int i=0 ; i<300 ; ++i )
{
for( int[] row : ranges )
{
if( row[0]<=i && row[1]-1>i )
System.out.print("#");
else
System.out.print(" ");
}
System.out.println();
}*/
Request requests[] = new Request[ranges.length];
GregorianCalendar start = new GregorianCalendar();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
start.setTime(sdf.parse("2000-01-01"));
for (int i = 0; i < 300; ++i) {
int row[] = ranges[i];
Request req = new Request();
req.setRecievedAt(start.getTimeInMillis() + ((long) row[0]) * 1000 * 60 * 60 * 24);
req.setFinishedAt(start.getTimeInMillis() + ((long) row[1]) * 1000 * 60 * 60 * 24);
requests[i] = req;
}
Object[] res =
weekly(
requests,
start.getTimeInMillis(),
start.getTimeInMillis() + (long) 300 * 1000 * 60 * 60 * 24);
for (Object c : res) {
Object[] row = (Object[]) c;
for (Object o : row) {
System.out.print(o + ", ");
}
System.out.println();
}
}
public static Object[] weekly(Request[] requests, long start, long end) {
GregorianCalendar dayStart = new GregorianCalendar();
dayStart.setTimeInMillis(start);
dayStart.set(Calendar.HOUR_OF_DAY, 0);
dayStart.set(Calendar.MINUTE, 0);
dayStart.set(Calendar.SECOND, 0);
dayStart.set(Calendar.MILLISECOND, 0);
GregorianCalendar dayEnd = new GregorianCalendar();
dayEnd.setTimeInMillis(dayStart.getTimeInMillis() + 1000 * 60 * 60 * 24);
Object[] results = new Object[(int) ((end - start) / ((long) 1000 * 60 * 60 * 24))];
for (int i = 0; dayStart.getTimeInMillis() < end; ++i) {
long cur = 0;
for (Request request : requests) {
// seek open requests
if (request.getRecievedAt() <= dayStart.getTimeInMillis()
&& request.getFinishedAt() > dayEnd.getTimeInMillis()) {
cur++;
}
}
Object row[] = new Object[3];
row[0] = new Long(dayStart.getTimeInMillis());
row[1] = new Long(dayEnd.getTimeInMillis());
row[2] = new Double(cur);
results[i] = row;
dayStart.setTimeInMillis(dayStart.getTimeInMillis() + 1000 * 60 * 60 * 24);
dayEnd.setTimeInMillis(dayStart.getTimeInMillis() + 1000 * 60 * 60 * 24);
}
return results;
}