/**
* Validates the arguments parsed from the command line.
*
* @throws UsageError if the arguments are invalid.
*/
protected void validateArgs() throws UsageError {
if (arguments.size() < 1) {
throw new UsageError("No command line arguments given");
}
if (!OptFlag.hasSourceArg(arguments)) {
throw new UsageError("must specify at least one source file");
}
}
