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https://issues.apache.org/jira/browse/AVRO-2243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16651428#comment-16651428
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ASF GitHub Bot commented on AVRO-2243:
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vamsi360 removed a comment on issue #349: AVRO-2243 Added support for union
types for a given Class without using @Union …
URL: https://github.com/apache/avro/pull/349#issuecomment-430175645
added the JIRA link
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> Add support for adding Union types for a Class without @Union annotation when
> not possible to mutate the class
> --------------------------------------------------------------------------------------------------------------
>
> Key: AVRO-2243
> URL: https://issues.apache.org/jira/browse/AVRO-2243
> Project: Avro
> Issue Type: Improvement
> Components: java
> Affects Versions: 1.8.2
> Reporter: Vamsi Subhash Achanta
> Priority: Major
>
> This patch facilitates the addition of Union types for a given class. This is
> equivalent to adding an @Union annotation with values. But this can help in
> cases where you cannot mutate the class to annotate it (or don't want to use
> java-agent to transform/mutate the class at runtime).
> UseCase:
> In our project, we are using ReflectData to generate schema for external jar
> imported classes which cannot be mutated. In this scenario, we cannot add
> @Union annotation to the base class to add all implemenations of the derived
> classes. So, when generating schema, the derived classes are not included.
> This patch will enable us to add the union type information so that
> ReflectData can generate the schema with union types also in it.
> Please let us know if you have any questions. I would make corresponding
> changes. Thanks
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