commons-cli feature request/suggestion: type-checking of parsed cmd line

[Omair-Inam Abdul-Matin]

I've been wondering for a while why the CLI has the ability to specify a 
type for an option but no feature to type-check a parsed command line. 
If there is such a feature could someone point it out to me?  If not 
then maybe a method like the one below could be used to at least allow 
primitive type checking:

public static void validate(Options options) throws ParseException{
        Iterator it = options.getOptions().iterator();
        while (it.hasNext()) {
            Option nextOpt = (Option) it.next();
            Object type = nextOpt.getType();
            if (type != null) {
                Class typeClass = (Class)type;
                if (typeClass.isPrimitive()) {
                    String name = typeClass.getName();
                    String val = nextOpt.getValue();
                    if (val != null) {
                        try {
                        if (name.equals("int"))
				Integer.parseInt(val);
                        if (name.equals("double")) 			
				Double.parseDouble(val);
                        if (name.equals("long"))
				Long.parseLong(val);
                        if (name.equals("char") && val.length() > 1)
                    throw new ParseException("expecting " + name +
                    " for " + nextOpt.getLongOpt() + " option: " + val);
                        if (name.equals("short"))
				Short.parseShort(val);
                        if (name.equals("byte"))
				Byte.parseByte(val);
                        if (name.equals("float"))
				Float.parseFloat(val);
                        if (name.equals("boolean") &&
                           (!val.equals("true") && val.equals("false")))
                 throw new ParseException("expecting " + name +
                   " for " + nextOpt.getLongOpt() + " option: " + val);
                        }
                        catch(NumberFormatException e) {
                            throw new ParseException("expecting " + 
name + " for " +
                                nextOpt.getLongOpt() + " option: " + val);
                        }
                    }
                }
            }
        }
    }

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