LuXugang commented on code in PR #792:
URL: https://github.com/apache/lucene/pull/792#discussion_r865502567


##########
lucene/core/src/java/org/apache/lucene/codecs/lucene91/Lucene91HnswVectorsReader.java:
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@@ -258,14 +257,20 @@ public TopDocs search(String field, float[] target, int 
k, Bits acceptDocs, int
   }
 
   private OffHeapVectorValues getOffHeapVectorValues(FieldEntry fieldEntry) 
throws IOException {
+    if (fieldEntry.docsWithFieldOffset == -2) {

Review Comment:
   > We could move this method to the OffHeapVectorValues class as a static 
constructor. It would be like static OffHeapVectorValues load(FieldEntry 
fieldEntry, IndexInput vectorData) { ... }.
   
   addressed in 
https://github.com/apache/lucene/pull/792/commits/02b6921fbd95196ece98943fcf06e896f1d03926
 .
   
   > We could move the getAcceptOrds method to OffHeapVectorValues. This lets 
us remove the check if (vectorValues instanceOf DenseOffHeapVectorValues) { .. 
}.
   
   addressed in 
https://github.com/apache/lucene/pull/792/commits/1f1be708c58337f4bb1542dc79a9bef1f189de15
 .
   
   > We can move OffHeapVectorValues to its own class now that it has grown. It 
would still be package-private.
   
   addressed in 
https://github.com/apache/lucene/pull/792/commits/771a9e53a0e05fd32ccfcd505149ab9b73686df7
 .



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