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https://issues.apache.org/jira/browse/THRIFT-623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12776714#action_12776714
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Nathan Marz commented on THRIFT-623:
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The generated Fields is an inner enum of the generated class... so it's fully 
qualified name will already be {full qualified generated classname}.Fields. 
This seems fine to me. However, I'd also be ok with adding an extra character - 
"_" is pretty ugly though. What if we call it "TFields"?

> Use a Java enum to represent field ids in generated structs
> -----------------------------------------------------------
>
>                 Key: THRIFT-623
>                 URL: https://issues.apache.org/jira/browse/THRIFT-623
>             Project: Thrift
>          Issue Type: Improvement
>          Components: Compiler (Java)
>            Reporter: Bryan Duxbury
>            Assignee: Bryan Duxbury
>             Fix For: 0.2
>
>         Attachments: thrift-623-v2.patch, thrift-623.patch
>
>
> The way things work today, field IDs get constants in their structs, but all 
> the methods take ints as parameters when they actually want a field id. This 
> is not the best, since it can lead to accidentally putting in field ids that 
> don't exist, and we have to do extra work to make sure things behave 
> correctly.
> Instead, we should make the field IDs into a proper Java enum class, and make 
> the methods take that class as the parameter type. That way, we'll get the 
> compiler's help enforcing our use of only legal field IDs, plus easier 
> association with name info, docstrings, etc. All in all, it should amount to 
> a usability improvement.

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