vibhatha commented on code in PR #44241:
URL: https://github.com/apache/arrow/pull/44241#discussion_r1800303797
##########
java/vector/src/main/java/org/apache/arrow/vector/complex/RunEndEncodedVector.java:
##########
@@ -312,8 +302,142 @@ public TransferPair getTransferPair(Field field,
BufferAllocator allocator, Call
*/
@Override
public TransferPair makeTransferPair(ValueVector target) {
- throw new UnsupportedOperationException(
- "RunEndEncodedVector does not support makeTransferPair(ValueVector)");
+ return new TransferImpl((RunEndEncodedVector) target);
+ }
+
+ private class TransferImpl implements TransferPair {
+
+ RunEndEncodedVector to;
+ TransferPair dataTransferPair;
+ TransferPair reeTransferPair;
+
+ public TransferImpl(String name, BufferAllocator allocator, CallBack
callBack) {
+ this(new RunEndEncodedVector(name, allocator, field.getFieldType(),
callBack));
+ }
+
+ public TransferImpl(Field field, BufferAllocator allocator, CallBack
callBack) {
+ this(new RunEndEncodedVector(field, allocator, callBack));
+ }
+
+ public TransferImpl(RunEndEncodedVector to) {
+ this.to = to;
+ if (to.getRunEndsVector() instanceof ZeroVector) {
+ to.initializeChildrenFromFields(field.getChildren());
+ }
+ reeTransferPair =
getRunEndsVector().makeTransferPair(to.getRunEndsVector());
+ dataTransferPair =
getValuesVector().makeTransferPair(to.getValuesVector());
+ }
+
+ /**
+ * Transfer this vector'data to another vector. The memory associated with
this vector is
Review Comment:
nit:
```suggestion
* Transfer the vector data to another vector. The memory associated
with this vector is
```
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