dsmiley commented on code in PR #14433:
URL: https://github.com/apache/lucene/pull/14433#discussion_r2034358885
##########
lucene/core/src/java/org/apache/lucene/search/similarities/Similarity.java:
##########
@@ -161,6 +162,17 @@ public long computeNorm(FieldInvertState state) {
return SmallFloat.intToByte4(numTerms);
}
+ /**
+ * Decodes the normalization value as computed by {@link
#computeNorm(FieldInvertState)}, yielding
+ * the field's position length.
+ *
+ * @param norm from {@link
org.apache.lucene.index.NumericDocValues#longValue()} of the norm.
+ * @return position length
+ */
+ public long decodeNormToLength(long norm) {
+ return SmallFloat.byte4ToInt((byte) norm);
+ }
Review Comment:
I should add the field name as an arg. The name is intentional -- if a
Similarity can't decode the norm to a position length, it can throw
`UnsupportedOperationException`.
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