/**
* Advance the iterator. Should only be called if {@link #isValid()} returned true. Valid can
* only chance after calls to {@link #next()}.
*/
public void next() {
newKeyGroup = false;
newKVState = false;
final RocksIterator rocksIterator = currentSubIterator.getIterator();
rocksIterator.next();
byte[] oldKey = currentSubIterator.getCurrentKey();
if (rocksIterator.isValid()) {
currentSubIterator.currentKey = rocksIterator.key();
if (isDifferentKeyGroup(oldKey, currentSubIterator.getCurrentKey())) {
heap.offer(currentSubIterator);
currentSubIterator = heap.poll();
newKVState = currentSubIterator.getIterator() != rocksIterator;
detectNewKeyGroup(oldKey);
}
} else {
rocksIterator.close();
if (heap.isEmpty()) {
currentSubIterator = null;
valid = false;
} else {
currentSubIterator = heap.poll();
newKVState = true;
detectNewKeyGroup(oldKey);
}
}
}
@Override
public void close() {
if (null != currentSubIterator) {
currentSubIterator.close();
currentSubIterator = null;
}
for (MergeIterator iterator : heap) {
iterator.close();
}
heap.clear();
}
public byte[] value() {
return currentSubIterator.getIterator().value();
}
/**
* Returns the Id of the k/v state to which the current key belongs.
*
* @return Id of K/V state to which the current key belongs.
*/
public int kvStateId() {
return currentSubIterator.getKvStateId();
}
public byte[] key() {
return currentSubIterator.getCurrentKey();
}