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https://issues.apache.org/jira/browse/THRIFT-1946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13643234#comment-13643234
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Jens Geyer commented on THRIFT-1946:
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I'm not a Java guy, but what is the reason why Java needs isset bits for
required fields? Shouldn't they always be set by definition, like e.g. with
C++?
> Non-optional field setters don't set __isset to true
> ----------------------------------------------------
>
> Key: THRIFT-1946
> URL: https://issues.apache.org/jira/browse/THRIFT-1946
> Project: Thrift
> Issue Type: Bug
> Components: C++ - Compiler
> Reporter: Vitali Lovich
>
> Optional fields __set_X modify the __isset structure for the object. This is
> not true of non-optional fields. When the object is initialized, you have to
> explicitly set the __isset field. It would be nice if __set_X set __isset to
> true for non-optional fields and optionally if __isset initialized to true
> for non-optional fields.
> This causes a difference between C++ & Java code that handles isSetX for
> non-optionals by just checking against null.
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