private Slices forReversePaging(
ClusteringComparator comparator, Clustering lastReturned, boolean inclusive) {
for (int i = slices.length - 1; i >= 0; i--) {
Slice slice = slices[i];
Slice newSlice = slice.forPaging(comparator, lastReturned, inclusive, true);
if (newSlice == null) continue;
if (slice == newSlice && i == slices.length - 1) return this;
ArrayBackedSlices newSlices =
new ArrayBackedSlices(comparator, Arrays.copyOfRange(slices, 0, i + 1));
newSlices.slices[i] = newSlice;
return newSlices;
}
return Slices.NONE;
}
private Slices forForwardPaging(
ClusteringComparator comparator, Clustering lastReturned, boolean inclusive) {
for (int i = 0; i < slices.length; i++) {
Slice slice = slices[i];
Slice newSlice = slice.forPaging(comparator, lastReturned, inclusive, false);
if (newSlice == null) continue;
if (slice == newSlice && i == 0) return this;
ArrayBackedSlices newSlices =
new ArrayBackedSlices(comparator, Arrays.copyOfRange(slices, i, slices.length));
newSlices.slices[0] = newSlice;
return newSlices;
}
return Slices.NONE;
}