[jira] [Created] (FLINK-13703) AvroTypeInfo requires objects to be strict POJOs (mutable, with setters)

[Shang Yuanchun (Jira)]

Alexander Fedulov created FLINK-13703:
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             Summary: AvroTypeInfo requires objects to be strict POJOs (mutable, with setters)
                 Key: FLINK-13703
                 URL: https://issues.apache.org/jira/browse/FLINK-13703
             Project: Flink
          Issue Type: Improvement
            Reporter: Alexander Fedulov


There exists an option to generate Avro sources which would represent immutable objects (`createSetters` option set to false) [1|https://github.com/commercehub-oss/gradle-avro-plugin] , [2|
https://avro.apache.org/docs/current/api/java/org/apache/avro/mojo/AbstractAvroMojo.html]. Those objects still have full arguments constructors and are being correctly dealt with by Avro.
 `AvroTypeInfo` in Flink performs a check to verify if a Class complies to the strict POJO requirements (including setters) and throws an IllegalStateException("Expecting type to be a PojoTypeInfo") otherwise. Can this check be relaxed to provide better immutability support?

+Steps to reproduce:+
1) Generate Avro sources from schema using `createSetters` option.
2) Use generated class in `ConfluentRegistryAvroDeserializationSchema.forSpecific(GeneratedClass.class, schemaRegistryUrl)`




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