public CommandLine(List<String> args, AbstractShellScript ss)
throws UnsupportedOptionException, InvalidOptionValueException {
for (int i = 0; i < args.size(); ++i) {
String arg = args.get(i);
// if this is a specified option that says that the next element is
// NOT an option
// like in "rm -- -f" if you wqnt to erase a file named "-f"
if (arg.equals("--")) {
// adds the next positional parameter as an argument
CommandLineElement parm = new CommandLineElement();
parm.setText(args.get(++i));
getPositionalParameters().add(parm);
} else {
// this is an option
if (arg.startsWith("-")) {
boolean isLong = arg.startsWith("--");
int pos = arg.indexOf('=');
String name = isLong ? arg.substring(0, pos > 0 ? pos : arg.length()) : arg;
OptionSpecification spec = ss.getOptionSpecification(name);
// no specifications exist for this parameter, which means
// that the option does not exist
if (spec == null) {
throw new UnsupportedOptionException(
"option \"" + arg + "\" is not supported. Please use \"--help\"");
} else {
Option option = new Option();
option.setSpecification(spec);
option.setSpecified(true);
// if the option requires a value
if (spec.getValueRegexp() != null) {
if (isLong) {
if (pos < 0) {
throw new InvalidOptionValueException("empty value for option " + name);
} else {
option.setValue(arg.substring(pos + 1));
}
} else {
option.setValue(args.get(++i));
}
}
getPositionalParameters().add(option);
}
}
// this argument is not an option, it's hence a parameter
else {
CommandLineElement parm = new CommandLineElement();
parm.setText(arg);
getPositionalParameters().add(parm);
}
}
}
}
public List<String> findArguments() {
List<String> args = new ArrayList<String>();
for (CommandLineElement p : getPositionalParameters()) {
if (!(p instanceof Option)) {
args.add(p.getText());
}
}
return Collections.unmodifiableList(args);
}