/** * 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); }