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https://issues.apache.org/jira/browse/ARROW-1184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16881725#comment-16881725
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Ji Liu commented on ARROW-1184:
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[~bryanc] Now for Struct and List type, getObject returns JsonStringHashMap and
JsonStringArrayList which support hashCode & equals well, I think we could
simply apply compare logic in Validator to Dicitionary#equals, and make some
change to make it work (e.g. add a wrapper for byte[] get from BinaryVector,
now Object.equals(byte[], byte[]) I think is not correct). In this way, we need
not add API for equals. What do you think?
> [Java] Dictionary.equals is not working correctly
> -------------------------------------------------
>
> Key: ARROW-1184
> URL: https://issues.apache.org/jira/browse/ARROW-1184
> Project: Apache Arrow
> Issue Type: Bug
> Components: Java
> Reporter: Bryan Cutler
> Priority: Major
> Fix For: 1.0.0
>
>
> The {{Dictionary.equals}} method does not return True when the dictionaries
> are equal. This is because {{equals}} is not implemented for FieldVector and
> so that comparison defaults to comparing the two objects only and not the
> vector data.
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