liyafan82 commented on a change in pull request #9151:
URL: https://github.com/apache/arrow/pull/9151#discussion_r583475049
##########
File path:
java/vector/src/main/codegen/templates/AbstractPromotableFieldWriter.java
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@@ -144,6 +174,16 @@ public ListWriter list() {
return getWriter(MinorType.LIST).list();
}
+ @Override
+ public MapWriter map() {
+ return getWriter(MinorType.LIST).map();
+ }
+
+ @Override
+ public MapWriter map(boolean keysSorted) {
+ return getWriter(MinorType.MAP, new ArrowType.Map(keysSorted));
Review comment:
Do we need to have two static final instaces of `ArrowType.Map` that
corresponds to cases when keysSorted equals to `true` and `false`?
This may avoid some object allocations.
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