add JavaDoc for expand8 in VectorUtil (#15218)

RamakrishnaChilaka · web-flow · commit 42ad379d0cfb · 2025-09-23T14:52:09.000+05:30
diff --git a/lucene/core/src/java/org/apache/lucene/util/VectorUtil.java b/lucene/core/src/java/org/apache/lucene/util/VectorUtil.java
@@ -492,6 +492,12 @@ public static int filterByScore(
     return IMPL.filterByScore(docBuffer, scoreBuffer, minScoreInclusive, upTo);
   }
 
+  /**
+   * Expands 64 integers in-place into a 256-element array by extracting individual bytes. Each
+   * 32-bit integer is split into 4 bytes. Only works on arrays with 256 length.
+   *
+   * @param arr the array to expand in-place
+   */
   public static void expand8(int[] arr) {
     IMPL.expand8(arr);
   }

Original file line number	Diff line number	Diff line change
`@@ -492,6 +492,12 @@ public static int filterByScore(`
`492`	`492`	`return IMPL.filterByScore(docBuffer, scoreBuffer, minScoreInclusive, upTo);`
`493`	`493`	`}`
`494`	`494`
	`495`	`+ /**`
	`496`	`+ * Expands 64 integers in-place into a 256-element array by extracting individual bytes. Each`
	`497`	`+ * 32-bit integer is split into 4 bytes. Only works on arrays with 256 length.`
	`498`	`+ *`
	`499`	`+ * @param arr the array to expand in-place`
	`500`	`+ */`
`495`	`501`	`public static void expand8(int[] arr) {`
`496`	`502`	`IMPL.expand8(arr);`
`497`	`503`	`}`