nitirajrathore commented on a change in pull request #55:
URL: https://github.com/apache/lucene/pull/55#discussion_r607812871
##########
File path: lucene/test-framework/src/java/org/apache/lucene/util/FullKnn.java
##########
@@ -0,0 +1,156 @@
+package org.apache.lucene.util;
+
+import org.apache.lucene.index.VectorValues;
+import org.apache.lucene.util.hnsw.NeighborQueue;
+
+import java.io.IOException;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+/**
+ * A utility class to calculate the Full KNN / Exact KNN over a set of query
vectors and document vectors.
+ */
+public class FullKnn {
+
+ private final int dim;
+ private final int topK;
+ private final VectorValues.SearchStrategy searchStrategy;
+ private final boolean quiet;
+
+ public FullKnn(int dim, int topK, VectorValues.SearchStrategy
searchStrategy, boolean quiet) {
+ this.dim = dim;
+ this.topK = topK;
+ this.searchStrategy = searchStrategy;
+ this.quiet = quiet;
+ }
+
+ /**
+ * internal object to track KNN calculation for one query
+ */
+ private static class KnnJob {
+ public int currDocIndex;
+ float[] queryVector;
+ float[] currDocVector;
+ int queryIndex;
+ NeighborQueue queue;
+ FloatBuffer docVectors;
+ VectorValues.SearchStrategy searchStrategy;
+
+ public KnnJob(int queryIndex, float[] queryVector, int topK,
VectorValues.SearchStrategy searchStrategy) {
+ this.queryIndex = queryIndex;
+ this.queryVector = queryVector;
+ this.currDocVector = new float[queryVector.length];
+ queue = new NeighborQueue(topK, searchStrategy.reversed);
+ this.searchStrategy = searchStrategy;
+ }
+
+ public void execute() {
+ while (this.docVectors.hasRemaining()) {
+ this.docVectors.get(this.currDocVector);
+ float d = this.searchStrategy.compare(this.queryVector,
this.currDocVector);
+ this.queue.insertWithOverflow(this.currDocIndex, d);
+ this.currDocIndex++;
+ }
+ }
+ }
+
+ /**
+ * computes the exact KNN match for each query vector in queryPath for all
the document vectors in docPath
+ *
+ * @param docPath : path to the file containing the float 32 document
vectors in bytes with little-endian byte order
+ * Throws exception if topK is greater than number of
documents in this file
Review comment:
fixed.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org
For additional commands, e-mail: issues-h...@lucene.apache.org
