lidavidm commented on code in PR #41895:
URL: https://github.com/apache/arrow/pull/41895#discussion_r1621534234


##########
java/dataset/pom.xml:
##########
@@ -150,6 +150,12 @@
       <version>2.15.1</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.hamcrest</groupId>
+      <artifactId>hamcrest</artifactId>
+      <version>2.2</version>

Review Comment:
   Can we set the version in dependencyManagement at the root level? I believe 
a few other modules use hamcrest too.



##########
java/vector/src/main/java/org/apache/arrow/vector/util/ValueVectorUtility.java:
##########


Review Comment:
   I suppose eventually we can add typed/generic versions? (I suppose we'd have 
to write out overloads per class so that `IntVector` returns 
`Iterator<Integer>` etc. Or else accept `Class<T>` and assert at runtime that 
the vector is of the right type.)



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