mikemccand commented on a change in pull request #179: URL: https://github.com/apache/lucene/pull/179#discussion_r699665391
########## File path: lucene/facet/src/java/org/apache/lucene/facet/taxonomy/directory/DirectoryTaxonomyReader.java ########## @@ -351,12 +348,140 @@ public FacetLabel getPath(int ordinal) throws IOException { } synchronized (categoryCache) { - categoryCache.put(catIDInteger, ret); + categoryCache.put(ordinal, ret); } return ret; } + private FacetLabel[] getPathFromCache(int... ordinals) { + FacetLabel[] facetLabels = new FacetLabel[ordinals.length]; + // TODO LUCENE-10068: can we use an int-based hash impl, such as IntToObjectMap, + // wrapped as LRU? + synchronized (categoryCache) { + for (int i = 0; i < ordinals.length; i++) { + facetLabels[i] = categoryCache.get(ordinals[i]); + } + } + return facetLabels; + } + + /** + * Checks if the ordinals in the array are >=0 and < {@code + * DirectoryTaxonomyReader#indexReader.maxDoc()} + * + * @param ordinals Integer array of ordinals + * @throws IllegalArgumentException Throw an IllegalArgumentException if one of the ordinals is + * out of bounds + */ + private void checkOrdinalBounds(int... ordinals) throws IllegalArgumentException { + for (int ordinal : ordinals) { + if (ordinal < 0 || ordinal >= indexReader.maxDoc()) { + throw new IllegalArgumentException( + "ordinal " + + ordinal + + " is out of the range of the indexReader " + + indexReader.toString() + + ". The maximum possible ordinal number is " + + (indexReader.maxDoc() - 1)); + } + } + } + + /** + * Returns an array of FacetLabels for a given array of ordinals. + * + * <p>This API is generally faster than iteratively calling {@link #getPath(int)} over an array of + * ordinals. It uses the {@link #getPath(int)} method iteratively when it detects that the index + * was created using StoredFields (with no performance gains) and uses DocValues based iteration + * when the index is based on BinaryDocValues. Lucene switched to BinaryDocValues in version 9.0 + * + * @param ordinals Array of ordinals that are assigned to categories inserted into the taxonomy + * index + */ + @Override + public FacetLabel[] getBulkPath(int... ordinals) throws IOException { + ensureOpen(); + checkOrdinalBounds(ordinals); + + int ordinalsLength = ordinals.length; + FacetLabel[] bulkPath = new FacetLabel[ordinalsLength]; + // remember the original positions of ordinals before they are sorted + int[] originalPosition = new int[ordinalsLength]; + Arrays.setAll(originalPosition, IntUnaryOperator.identity()); + + getPathFromCache(ordinals); Review comment: And maybe if we wind up removing this cache entirely, we don't need to do this issue! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org