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

[Adrian Nistor (JIRA)]

     [ https://issues.jboss.org/browse/IPROTO-63?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrian Nistor updated IPROTO-63:
--------------------------------
    Status: Open  (was: New)


> 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]. 
> If the oneof label is replaced with the commented optional fields, the marshallers work as expected.



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