/**
* Write a user or item index to the file.
*
* @param map The index to write.
*/
private void writeIndex(Long2ObjectMap<IntList> map) throws IOException {
LongSortedSet keys = LongUtils.packedSet(map.keySet());
BinaryIndexTableWriter tableWriter =
BinaryIndexTableWriter.create(format, channel, keys.size());
SortComparator indexComparator = new SortComparator();
LongIterator iter = keys.iterator();
while (iter.hasNext()) {
final long key = iter.nextLong();
int[] indexes = map.get(key).toIntArray();
if (needsSorting) {
IntArrays.quickSort(indexes, indexComparator);
}
if (translationMap != null) {
for (int i = 0; i < indexes.length; i++) {
indexes[i] = translationMap[indexes[i]];
}
}
logger.debug("writing {} indices for id {}", key, indexes.length);
tableWriter.writeEntry(key, indexes);
}
}
LongSortedSet itemSet(long item) {
return LongUtils.packedSet(item);
}
