gsmiller commented on a change in pull request #443:
URL: https://github.com/apache/lucene/pull/443#discussion_r751462508
##########
File path:
lucene/facet/src/java/org/apache/lucene/facet/taxonomy/OrdinalMappingLeafReader.java
##########
@@ -107,6 +113,64 @@ public BytesRef binaryValue() {
}
}
+ private class OrdinalMappingSortedNumericDocValues extends
FilterSortedNumericDocValues {
+ private final IntArrayList currentValues;
+ private int currIndex;
+
+ OrdinalMappingSortedNumericDocValues(SortedNumericDocValues in) {
+ super(in);
+ currentValues = new IntArrayList(32);
+ }
+
+ @Override
+ public boolean advanceExact(int target) throws IOException {
+ boolean result = in.advanceExact(target);
+ if (result) {
+ reloadValues();
+ }
+ return result;
+ }
+
+ @Override
+ public int advance(int target) throws IOException {
+ int result = in.advance(target);
+ if (result != DocIdSetIterator.NO_MORE_DOCS) {
+ reloadValues();
+ }
+ return result;
+ }
+
+ @Override
+ public int nextDoc() throws IOException {
+ int result = in.nextDoc();
+ if (result != DocIdSetIterator.NO_MORE_DOCS) {
+ reloadValues();
+ }
+ return result;
+ }
+
+ @Override
+ public int docValueCount() {
+ return currentValues.elementsCount;
+ }
+
+ private void reloadValues() throws IOException {
+ currIndex = 0;
+ currentValues.clear();
+ for (int i = 0; i < in.docValueCount(); i++) {
+ currentValues.add(ordinalMap[(int) in.nextValue()]);
+ }
+ Arrays.sort(currentValues.buffer, 0, currentValues.elementsCount);
Review comment:
The ordinal map gets created inside the `DirectoryTaxonomyWriter` merge
logic, so I'm relying on that producing correct (1:1) mappings. If this were to
happen though, we have parity between "old" and "new" though right now in the
sense that both will end up storing the duplicate values. Do you think there's
some additional checks or error handling we should include here? We could
explicitly check for dups after mapping/sorting, but I'm not sure what error
handling we'd want to put in place at that point to gracefully handle the
problem?
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