ChrisHegarty commented on code in PR #13119:
URL: https://github.com/apache/lucene/pull/13119#discussion_r1497177281
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lucene/core/src/java/org/apache/lucene/codecs/lucene99/Lucene99HnswVectorsReader.java:
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@@ -171,15 +172,25 @@ private void validateFieldEntry(FieldInfo info,
FieldEntry fieldEntry) {
}
}
+ // List of vector similarity functions. This list is defined here, in order
+ // to avoid an undesirable dependency on the declaration and order of values
+ // in VectorSimilarityFunction. The list values and order have been chosen to
+ // match that of VectorSimilarityFunction in, at least, Lucene 9.10. Values
+ // should only be appended to the end of the list.
+ public static final List<VectorSimilarityFunction> SIMILARITY_FUNCTIONS =
Review Comment:
There's a little duplication here, but we want the codecs to be largely
independent.
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