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https://issues.apache.org/jira/browse/THRIFT-452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12736842#action_12736842
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Bryan Duxbury commented on THRIFT-452:
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Is this still an issue, or should I close it?
> Gotcha with Java enums not having a zero value
> ----------------------------------------------
>
> Key: THRIFT-452
> URL: https://issues.apache.org/jira/browse/THRIFT-452
> Project: Thrift
> Issue Type: Bug
> Components: Compiler (Java)
> Reporter: Ben Maurer
>
> In the java library, if you define an enum that does not have a value
> declared for 0, it seems like you can get into a strange situation. In java,
> the field for the enum will be set to zero, but isset will be true. Compare
> to a language like Python where the value will be None, causing isset to
> effectively be false. When the value is deserialized, Java will check if the
> enum value is valid, find that it is not, and throw an exception.
> Any thoughts on the best behavior?
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