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https://issues.apache.org/jira/browse/AVRO-1570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thiruvalluvan M. G. updated AVRO-1570:
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Component/s: java
> ReflectData.AllowNull fails with polymorphism and @Union annotation
> -------------------------------------------------------------------
>
> Key: AVRO-1570
> URL: https://issues.apache.org/jira/browse/AVRO-1570
> Project: Apache Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.7.6
> Reporter: Sachin Goyal
> Priority: Major
>
> Nested union exception is thrown if the following structure is serialized
> with ReflectData.AllowNull
> (Plain ReflectData works fine)
> {code}
> @Union({Derived.class})
> class Base
> {
> Integer a = 5;
> }
> class Derived extends Base
> {
> String b = "Foo";
> }
> class PolymorphicDO
> {
> Base obj = new Derived();
> }
> // Serialization code:
> ReflectData rdata = ReflectData.AllowNull.get();
> Schema schema = rdata.getSchema(PolymorphicDO.class);
> ReflectDatumWriter<T> datumWriter = new ReflectDatumWriter
> (PolymorphicDO.class, rdata);
> DataFileWriter<T> fileWriter = new DataFileWriter<T> (datumWriter);
> fileWriter.create(schema, new ByteArrayOutputStream());
> fileWriter.append(new PolymorphicDO());
> {code}
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