Reusing JCommander object fails

I’m trying to reuse a JCommander instance, because I’m trying to create a simple Command Prompt-like Java front-end. I instantiate it and add a test command as such:

JCommander jc = new JCommander();
JCommanderTest jct = new JCommanderTest();
jc.addCommand(jct);

I then attempt to parse the command twice, as such:

String[] argv = {"example", "-log", "2", "-groups", "unit"};
parseAndExecute(argv);

String[] argv2 = {example", "-log", "3", "-groups", "unit2", "unit3"};
parseAndExecute(argv2);

Where parseAndExecute is defined as such:

private void parseAndExecute(String[] args)
    {
        jc.parse(args);
        String parsedCommand = jc.getParsedCommand();
        JCommander parsedJCommander = jc.getCommands().get(parsedCommand);
        IJCommand commandObject = (IJCommand) parsedJCommander.getObjects().get(0);
        commandObject.execute();        
    }

IJCommand is an interface that defines only the single method execute().

Now, the first time an array is parsed, it works as expected. However, the second time it gives the following exception:

Exception in thread “main” com.beust.jcommander.ParameterException: Can only specify option -log once

Does this mean it is not possible to reuse a JCommander object in this fashion? And if it is not possible, then what workaround is recommended?

[cbeust]

You need to fork before you can submit a pull request.

Cédric

On Tue, Jul 5, 2016 at 6:42 AM, Jae Gangemi [e-mail] wrote:

ugh - why fork the project instead of just submitting a pull request?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/cbeust/jcommander/issues/271#issuecomment-230481454, or mute the thread https://github.com/notifications/unsubscribe/AAFoosSxYB4TtSTYtnezb5DfQIeMvg_Bks5qSl81gaJpZM4Iudpj .

[jgangemi]

yes of course you do. sorry - i took forking to mean something different in this context.