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Posted to dev@avro.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2016/02/04 23:54:40 UTC
[jira] [Commented] (AVRO-1568) Allow Java polymorphism in Avro for
third-party code
[ https://issues.apache.org/jira/browse/AVRO-1568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15133227#comment-15133227 ]
ASF GitHub Bot commented on AVRO-1568:
--------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/avro/pull/20
> Allow Java polymorphism in Avro for third-party code
> ----------------------------------------------------
>
> Key: AVRO-1568
> URL: https://issues.apache.org/jira/browse/AVRO-1568
> Project: Avro
> Issue Type: Improvement
> Affects Versions: 1.7.6
> Reporter: Sachin Goyal
>
> A large number of Java designs interacting with databases with Hibernate/Couchbase (perhaps, even otherwise) have Java polymorphism of the form:
> {code:java}
> class Base
> {
> Integer a = 5;
> }
> class Derived extends Base
> {
> String b = "Foo";
> }
> class PolymorphicDO
> {
> Base b = new Derived();
> }
> {code}
> Jackson handles this kind of field by using annotations such as:
> {code}
> @JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "@class”)
> {code}
> If such a thing can be added to Avro, all those Java designs could become immediately usable with Avro. They would also become Hadoop compatible due to AvroSerde.
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