jmazanec15 commented on code in PR #12050:
URL: https://github.com/apache/lucene/pull/12050#discussion_r1091106407
##########
lucene/core/src/java/org/apache/lucene/util/hnsw/HnswGraphBuilder.java:
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@@ -143,10 +148,64 @@ public OnHeapHnswGraph build(RandomAccessVectorValues
vectorsToAdd) throws IOExc
return hnsw;
}
+ /**
+ * Initializes the graph of this builder. Transfers the nodes and their
neighbors from the
+ * initializer graph into the graph being produced by this builder, mapping
ordinals from the
+ * initializer graph to their new ordinals in this builder's graph. The
builder's graph must be
+ * empty before calling this method.
+ *
+ * @param initializerGraph graph used for initialization
+ * @param oldToNewOrdinalMap map for converting from ordinals in the
initializerGraph to this
+ * builder's graph
+ */
+ public void initializeFromGraph(
+ HnswGraph initializerGraph, Map<Integer, Integer> oldToNewOrdinalMap)
throws IOException {
+ assert hnsw.size() == 0;
Review Comment:
Makes sense. Will update.
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