[
https://issues.apache.org/jira/browse/THRIFT-735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12845681#action_12845681
]
David Reiss commented on THRIFT-735:
------------------------------------
> Also, since we don't allow unset unions (or structs that contain unset
> unions) to be serialized,
That's compelling, but before I give in, consider this:
If Bar were not a union, but a struct containing all optional fields (which was
originally supposed to be how unions are interpreted), and bar contained only
fields that the receiver didn't know about, that would *not* cause bar to be
skipped. The Foo would just contain an empty Bar.
Do you remember why decided not to allow serializing empty unions?
> Required field checking is broken when the field type is a Union struct
> -----------------------------------------------------------------------
>
> Key: THRIFT-735
> URL: https://issues.apache.org/jira/browse/THRIFT-735
> Project: Thrift
> Issue Type: Bug
> Components: Compiler (Java), Library (Java)
> Affects Versions: 0.2
> Reporter: Bryan Duxbury
> Assignee: Bryan Duxbury
> Fix For: 0.3
>
> Attachments: thrift-735.patch
>
>
> The validate() method on generated structs verifies that required fields are
> set after validation. However, if the type of the field is a Union struct,
> then just checking that the field isn't null is not a valid check. The value
> may be a non-null union, but have an unset field. (We encountered this when
> deserializing a type that had a union for a field, and the union's set value
> was an enum value that had been removed from the definition, making it a
> skip.)
> In order to perform the correct validation, if the value is a Union, then we
> must also check that the set field and value are non-null.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
