JCommander example

    @Parameters(
        commandNames = "sound-cloud-filter",
        commandDescription = "Copy resolver data",
        separators = "=")
    public static class CmdOpts {
        @Parameter(
            names = {"-e", "--env"},
            required = true,
            description = "Environment to analyze data on",
            converter = EnvConverter.class)
        private Env env;

        @Parameter(
            // names = the rest of the parameters passed
            required = true,
            description = "Execution modes list")
        private List<Mode> modes;

        // needed for JCommander
        public CmdOpts() {
        }

        public CmdOpts(Env env, List<Mode> modes) {
            this.env = env;
            this.modes = modes;
        }

        @Override
        public String toString() {
            //noinspection StringBufferReplaceableByString
            final StringBuilder sb = new StringBuilder("CmdOpts(");
            sb.append("env=").append(env);
            sb.append(", modes=").append(modes);
            sb.append(')');
            return sb.toString();
        }

        @Override
        public void execute() {
            // interface Cmd is enforced here by CommandLauncher
            new SoundCloudFilter(this).run();
        }
    }