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https://issues.apache.org/jira/browse/AVRO-241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Doug Cutting updated AVRO-241:
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Attachment: AVRO-241.patch
Here's a new version that uses schema properties to note array element types.
This changes collection implementation classes to use schema properties too.
> add union annotation to reflect API
> -----------------------------------
>
> Key: AVRO-241
> URL: https://issues.apache.org/jira/browse/AVRO-241
> Project: Avro
> Issue Type: Improvement
> Components: java
> Reporter: Doug Cutting
> Assignee: Doug Cutting
> Fix For: 1.3.0
>
> Attachments: AVRO-241.patch, AVRO-241.patch, AVRO-241.patch
>
>
> In existing Hadoop RPC interfaces one can use an abstract base class or
> interface in a method declaration, and then pass different instantiable
> subclasses, since Hadoop RPC tags parameters and return types with their
> runtime java class name. To permit such interfaces to be supported by Avro
> reflection we can add a Union annotation that can be added to the base class,
> declaring its instantiable subclasses for Avro.
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