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List:       avro-dev
Subject:    [jira] [Created] (AVRO-1570) ReflectData.AllowNull fails with polymorphism and @Union annotation
From:       "Sachin Goyal (JIRA)" <jira () apache ! org>
Date:       2014-08-22 4:29:11
Message-ID: JIRA.12735982.1408681735075.9719.1408681751323 () arcas
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Sachin Goyal created AVRO-1570:
----------------------------------

             Summary: ReflectData.AllowNull fails with polymorphism and @Union annotation
                 Key: AVRO-1570
                 URL: https://issues.apache.org/jira/browse/AVRO-1570
             Project: Avro
          Issue Type: Bug
    Affects Versions: 1.7.6
            Reporter: Sachin Goyal


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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