[ 
https://issues.apache.org/jira/browse/ARROW-1816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16261300#comment-16261300
 ] 

ASF GitHub Bot commented on ARROW-1816:
---------------------------------------

BryanCutler commented on a change in pull request #1330: wip: ARROW-1816: 
[Java] Resolve new vector classes structure for timestamp, date and maybe 
interval    
URL: https://github.com/apache/arrow/pull/1330#discussion_r152365593
 
 

 ##########
 File path: java/vector/src/main/codegen/templates/UnionVector.java
 ##########
 @@ -138,16 +138,20 @@ private void setReaderAndWriterIndex() {
      throw new UnsupportedOperationException("There are no inner vectors. Use 
geFieldBuffers");
   }
 
-  private String fieldName(MinorType type) {
-    return type.name().toLowerCase();
+  private String fieldName(ArrowType type) {
+    return Types.getMinorTypeForArrowType(type).name().toLowerCase();
   }
 
-  private FieldType fieldType(MinorType type) {
-    return FieldType.nullable(type.getType());
-  }
+  // private FieldType fieldType(MinorType type) {
+  // return FieldType.nullable(type.getType());
+  // }
+
+  // private <T extends FieldVector> T addOrGet(MinorType minorType, Class<T> 
c) {
+  // return internalMap.addOrGet(fieldName(minorType), fieldType(minorType), 
c);
+  // }
 
 Review comment:
   forgot to remove?

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> [Java] Resolve new vector classes structure for timestamp, date and maybe 
> interval
> ----------------------------------------------------------------------------------
>
>                 Key: ARROW-1816
>                 URL: https://issues.apache.org/jira/browse/ARROW-1816
>             Project: Apache Arrow
>          Issue Type: Sub-task
>            Reporter: Li Jin
>              Labels: pull-request-available
>             Fix For: 0.8.0
>
>
> Personally I think having 8 vector classes for timestamps is not great. This 
> is discussed at some point during the PR:
> https://github.com/apache/arrow/pull/1203#discussion_r145241388



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