[infinispan-issues] [JBoss JIRA] (IPROTO-33) ClassCastException with Array of Enums

[Gustavo Fernandes (JIRA)]

Gustavo Fernandes created IPROTO-33:
---------------------------------------

             Summary: ClassCastException with Array of Enums
                 Key: IPROTO-33
                 URL: https://issues.jboss.org/browse/IPROTO-33
             Project: Infinispan ProtoStream
          Issue Type: Bug
    Affects Versions: 4.0.0.Alpha5
            Reporter: Gustavo Fernandes


The entity is defined as:

{code:java}
public class Account extends BaseMessage {

   public enum Currency {
      EUR, GBP, USD, BRL
   }
  ...
   private Currency[] currencies;
   ...
}
{code}

Protofile:

{code}
message Account {
  ... 

  /* @TypeId(43) */
   enum Currency {
      EUR = 0;
      GBP = 1;
     ...
   }

   repeated Currency currencies = 6;
   ...
}
{code}

Marshaller:

{code:java}

public class AccountMarshaller implements MessageMarshaller<Account> {
   ...

 @Override
   public Account readFrom(ProtoStreamReader reader) throws IOException {
     ...
      Account.Currency[] currencies = reader.readArray("currencies", Account.Currency.class);
      Account account = new Account();
      ...
      account.setCurrencies(currencies);
      return account;
   }

   @Override
   public void writeTo(ProtoStreamWriter writer, Account account) throws IOException {
      ...
      writer.writeArray("currencies", account.getCurrencies(), Account.Currency.class);
   }

}
{code}

When trying to marshal and unmarshall a message:

{code:java}
Account account = ...
SerializationContext context = ...
byte[] bytes = ProtobufUtil.toWrappedByteArray(context, account);

// Throws CCE
Account acc = ProtobufUtil.fromWrappedByteArray(context, bytes);
{code}


{noformat}
java.lang.ClassCastException: java.lang.Long cannot be cast to [B

	at org.infinispan.protostream.impl.ProtoStreamReaderImpl.readCollection(ProtoStreamReaderImpl.java:374)
	at org.infinispan.protostream.impl.ProtoStreamReaderImpl.readArray(ProtoStreamReaderImpl.java:470)
	at org.infinispan.protostream.domain.marshallers.AccountMarshaller.readFrom(AccountMarshaller.java:33)
	at org.infinispan.protostream.domain.marshallers.AccountMarshaller.readFrom(AccountMarshaller.java:14)
	at org.infinispan.protostream.impl.MessageMarshallerDelegate.unmarshall(MessageMarshallerDelegate.java:113)
	at org.infinispan.protostream.WrappedMessage.readMessage(WrappedMessage.java:306)
	at org.infinispan.protostream.ProtobufUtil.fromWrappedByteArray(ProtobufUtil.java:154)
	at org.infinispan.protostream.ProtobufUtil.fromWrappedByteArray(ProtobufUtil.java:149)


{noformat}




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