[jira] [Updated] (AVRO-1400) Introduce annotation to specify default values

["Doug Cutting (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AVRO-1400?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Doug Cutting updated AVRO-1400:
-------------------------------

    Attachment: AVRO-1400.patch

Here's a patch that implements an AvroDefault annotation.  Note that default values must be specified as a json string, since Java does not permit arbitrary types to be specified as annotation values.

If this looks suitable & no one objects then I will commit this.

> Introduce annotation to specify default values
> ----------------------------------------------
>
>                 Key: AVRO-1400
>                 URL: https://issues.apache.org/jira/browse/AVRO-1400
>             Project: Avro
>          Issue Type: Improvement
>          Components: java
>    Affects Versions: 1.7.5
>            Reporter: dennis lucero
>              Labels: annotation, features, reflection, schema
>         Attachments: AVRO-1400.patch
>
>
> It would be nice if there was an annotation in org.apache.avro.reflect to specify default values for schemata derived reflectively, allowing for proper schema evolution.
> I suggest the following:
> {code:java}
> @AvroDefault(1)
> int someNum;
> @Nullable
> @AvroDefault(null)
> AnotherRecord myRec;
> {code}



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