[jira] [Created] (AVRO-3946) Support single-element unions for Java code generation

[M. Justin (Jira)]

M. Justin created AVRO-3946:
-------------------------------

             Summary: Support single-element unions for Java code generation
                 Key: AVRO-3946
                 URL: https://issues.apache.org/jira/browse/AVRO-3946
             Project: Apache Avro
          Issue Type: Improvement
          Components: java, tools
    Affects Versions: 1.11.3
         Environment: [Avro 
specification|https://avro.apache.org/docs/1.11.1/specification/#unions]
            Reporter: M. Justin


I am writing code to integrate with existing Avro-based data created by someone 
else.  Their schema currently has one-element unions for their types, rather 
than just the specific types.  For example:

{code:json}
{
  "type": "record",
  "name": "Issue",
  "namespace": "invalid.example",
  "fields": [
    {
      "name": "long1",
      "type": ["long"]
    }
  ]
}
{code}

instead of:

{code:json}
{
  "type": "record",
  "name": "Issue",
  "namespace": "invalid.example",
  "fields": [
    {
      "name": "long1",
      "type": "long"
    }
  ]
}
{code}

While this isn't idiomatic, looking at the 



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