private static List<byte[]> getPointKeys(
List<List<KeyRange>> ranges, int[] slotSpan, RowKeySchema schema, Integer bucketNum) {
if (ranges == null || ranges.isEmpty()) {
return Collections.emptyList();
}
boolean isSalted = bucketNum != null;
int count = 1;
int offset = isSalted ? 1 : 0;
// Skip salt byte range in the first position if salted
for (int i = offset; i < ranges.size(); i++) {
count *= ranges.get(i).size();
}
List<byte[]> keys = Lists.newArrayListWithExpectedSize(count);
int[] position = new int[ranges.size()];
int maxKeyLength = SchemaUtil.getMaxKeyLength(schema, ranges);
int length;
byte[] key = new byte[maxKeyLength];
do {
length =
ScanUtil.setKey(
schema,
ranges,
slotSpan,
position,
Bound.LOWER,
key,
offset,
offset,
ranges.size(),
offset);
if (isSalted) {
key[0] = SaltingUtil.getSaltingByte(key, offset, length, bucketNum);
}
keys.add(Arrays.copyOf(key, length + offset));
} while (incrementKey(ranges, position));
return keys;
}
