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https://issues.apache.org/jira/browse/AVRO-1400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13820007#comment-13820007
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dennis lucero commented on AVRO-1400:
-------------------------------------
I tried the workaround {code:java}@AvroMeta(key="default",
value="null"){code}but this is actually forbidden:
{code}org.apache.avro.AvroRuntimeException: Can't set reserved property: default
at org.apache.avro.JsonProperties.addProp(JsonProperties.java:81)
at org.apache.avro.JsonProperties.addProp(JsonProperties.java:67)
at
org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:484)
at
org.apache.avro.reflect.ReflectData.getAnnotatedUnion(ReflectData.java:527)
at
org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:440)
at
org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:377)
at
org.apache.avro.reflect.ReflectData.createFieldSchema(ReflectData.java:577)
at
org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:467)
at
org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:377)
at
org.apache.avro.reflect.ReflectData.createFieldSchema(ReflectData.java:577)
at
org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:467)
at
org.apache.avro.specific.SpecificData.getSchema(SpecificData.java:188){code}
> 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
>
> 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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