blueflood-core/src/main/java/com/rackspacecloud/blueflood/types/Range.java
public static Iterable<Range> rangesForInterval(Granularity g, final long from, final long to) {
        if (g == Granularity.FULL) {
            return Arrays.asList(new Range(from, to));
        }

        final long snappedStartMillis = g.snapMillis(from);
        final long snappedStopMillis = g.snapMillis(to + g.milliseconds());

        return new IntervalRangeIterator(g, snappedStartMillis, snappedStopMillis);
    }
public static Iterable<Range> rangesForInterval(Granularity g, final long from, final long to) {
        if (g == Granularity.FULL) {
            return Arrays.asList(new Range(from, to));
        }

        final long snappedStartMillis = g.snapMillis(from);
        final long snappedStopMillis = g.snapMillis(to + g.milliseconds());

        return new IntervalRangeIterator(g, snappedStartMillis, snappedStopMillis);
    }
return the Ranges for an interval at this granularity
@param from start time
@param to end time
@return Range[]