[infinispan-issues] [JBoss JIRA] (IPROTO-63) writeObject throws IllegalArgumentException with oneof label

[Ryan Emerson (JIRA)]

Ryan Emerson created IPROTO-63:
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             Summary: writeObject throws IllegalArgumentException with oneof label
                 Key: IPROTO-63
                 URL: https://issues.jboss.org/browse/IPROTO-63
             Project: Infinispan ProtoStream
          Issue Type: Bug
            Reporter: Ryan Emerson


The below schema results in the following exception:

Schema:
{code:java}
message EntryVersion {
    oneof version {
        NumericVersion numeric = 1;
        ClusteredVersion clustered = 2;
    }
//    optional NumericVersion numeric = 1;
//    optional ClusteredVersion clustered = 2;
}

message NumericVersion {
    required int64 version = 1;
}

message ClusteredVersion {
    required int64 version = 1;
    required int32 topology = 2;
}
{code}

Exception:

{code:java}
java.lang.IllegalArgumentException: Declared field type is not a message or an enum : numeric
{code}

It seems this is caused because the type for the field "numeric" is null in the associated FieldDescriptor object that is retrieved in the [writeObject impl|https://github.com/infinispan/protostream/blob/master/core/src/main/java/org/infinispan/protostream/impl/ProtoStreamWriterImpl.java#L452-L470]. 




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