[jira] [Created] (AVRO-2808) Java: ReflectData incorrectly handles hidden fields

["Andy Le (Jira)" <ji...@apache.org>]

Andy Le created AVRO-2808:
-----------------------------

             Summary: Java: ReflectData incorrectly handles hidden fields
                 Key: AVRO-2808
                 URL: https://issues.apache.org/jira/browse/AVRO-2808
             Project: Apache Avro
          Issue Type: Bug
          Components: java
            Reporter: Andy Le


Hi guys,

I've got the following test:


{code:java}
public ReflectTest{
  public class Definition {
    public Map<String, Type> tokens;
  }

  public enum Type {
    A,
    B,
    C
  }

  @Test
  public void testAvro2805() {
    Schema schema = ReflectData.get().getSchema(Definition.class);

    final String schemaString = schema.toString(true);

    System.out.println(schemaString);
  }

}
{code}

When I ran the test, an exception is raised:


{noformat}
org.apache.avro.SchemaParseException: Illegal character in: this$0

	at org.apache.avro.Schema.validateName(Schema.java:1530)
	at org.apache.avro.Schema.access$400(Schema.java:87)
	at org.apache.avro.Schema$Field.<init>(Schema.java:518)
	at org.apache.avro.Schema$Field.<init>(Schema.java:557)
	at org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:683)
	at org.apache.avro.specific.SpecificData$3.computeValue(SpecificData.java:335)
	at org.apache.avro.specific.SpecificData$3.computeValue(SpecificData.java:332)
{noformat}


From the log, you may see that: we should not handle Java hidden field `this$0` which is used to hold reference to outer class instances.

This issue is somehow related to [this one|https://issues.apache.org/jira/browse/AVRO-2805]





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