leerho commented on code in PR #684:
URL: https://github.com/apache/datasketches-java/pull/684#discussion_r2288829540
##########
src/main/java/org/apache/datasketches/quantiles/DoublesSketch.java:
##########
@@ -151,29 +151,59 @@ public static DoublesSketch heapify(final MemorySegment
srcSeg) {
}
/**
- * Wrap this sketch around the given updatable MemorySegment image of a
DoublesSketch, compact or updatable.
+ * Wrap this sketch around the given MemorySegment image of a compact,
read-only DoublesSketch.
*
- * @param srcSeg the given MemorySegment image of a DoublesSketch that may
have data
- * @return a sketch that wraps the given srcSeg in read-only mode.
+ * @param srcSeg the given MemorySegment image of a compact, read-only
DoublesSketch.
+ * @return a compact, read-only sketch that wraps the given MemorySegment.
*/
public static DoublesSketch wrap(final MemorySegment srcSeg) {
+ if (!checkIsMemorySegmentCompact(srcSeg)) {
+ throw new SketchesArgumentException("MemorySegment sketch image must be
in compact form.");
+ }
+ return DirectCompactDoublesSketch.wrapInstance(srcSeg);
+ }
+
+ /**
+ * Wrap this sketch around the given MemorySegment image of an updatable
DoublesSketch.
+ *
+ * <p>The given MemorySegment must be writable and it must contain a
<i>UpdateDoublesSketch</i>.
+ * The sketch will be updated and managed totally within the MemorySegment.
If the given source
+ * MemorySegment is created off-heap, then all the management of the
sketch's internal data will be off-heap as well.</p>
+ *
+ * <p><b>NOTE:</b>If during updating of the sketch the sketch requires more
capacity than the given size of the MemorySegment, the sketch
+ * will request more capacity using the {@link MemorySegmentRequest
MemorySegmentRequest} interface. The default of this interface will
+ * return a new MemorySegment on the heap.</p>
+ *
+ * @param srcSeg the given MemorySegment image of an
<i>UpdateDoublesSketch</i>.
+ * @return an updatable sketch that wraps the given MemorySegment.
+ */
+ public static DoublesSketch writableWrap(final MemorySegment srcSeg) {
if (checkIsMemorySegmentCompact(srcSeg)) {
- return DirectCompactDoublesSketch.wrapInstance(srcSeg);
+ throw new SketchesArgumentException("MemorySegment sketch image must be
in updatable form.");
Review Comment:
Done.
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