private RubyString sub(RubyString g, RubyArray args) {
if (null == args || args.size() != 2) {
int actual_argc = (null == args) ? 0 : args.size();
throw new RubyException(
RubyRuntime.ArgumentErrorClass,
"in `sub': wrong number of arguments (" + actual_argc + " for 2)");
}
if (!(args.get(1) instanceof RubyString)) {
throw new RubyException(
RubyRuntime.ArgumentErrorClass,
"can't convert " + args.get(1).getRubyClass().getName() + " into String");
}
RubyString s = (RubyString) args.get(1);
if (args.get(0) instanceof RubyRegexp) {
RubyRegexp r = (RubyRegexp) args.get(0);
return r.sub(g, s);
} else if (args.get(0) instanceof RubyString) {
RubyString r = (RubyString) args.get(0);
String result = StringMe.replaceFirst(g.toString(), r.toString(), s.toString());
return ObjectFactory.createString(result);
} else {
throw new RubyException(
RubyRuntime.ArgumentErrorClass,
"wrong argument type " + args.get(0).getRubyClass().getName() + " (expected Regexp)");
}
}
