Java enum in JPL

All,

I have been researching the web to find out how to create enum variables in
JPL. So far I have found now examples and trial and error has been mostly
error. Here is the fragment I need to emulate from SWI Prolog:


    ArrayList< String > namesOfInterest = new ArrayList< String >();

    AppTierSourceUsageRequestMessage.MessageType messageType =
      getInvokeArgs( args, namesOfInterest );

    ArrayList< String > result = null;

    try {
      result = invoke( messageType, namesOfInterest );
    }
    catch( CannotProcessException ex ) {
      System.out.println( "MakeAppTierRequest.invoke() failed! Got ex=" +
ex );
      System.exit( 1 );
    }


MessageType is an enum. I know how to make an array of strings as needed
for the 2nd argument of invoke but not so much luck with the first
argument. I want to pass the constant enum value:
GET_FILE_NAMES_AND_TOKEN_NAMES.

My call so far looks like:

    jpl_call( 'com.xxxxxx.xxxxx.messages.MakeAppTierRequest', invoke,
['????',Ac], F),
Ac is an array of Strings and seems to be correct.


Any thoughts or example uses of enum variables in JPL would be appreciated!

Thanks!

Jerry
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