Content of parser/Parser.java extracted from pretty.jar

//
// Very simple command line parser
//
// version 0.1
// version 0.2: adapted to JDK 1.5, included package
//
// see file readme.txt for the usage
//
package parser;
 
import java.util.ArrayList;
 
 
public class Parser
{
	ArrayList<Option> options = new ArrayList<Option>();
 
// addOption(String match,boolean hasValue, String nameValue, String description)
	public Option addOption(String match,boolean hasValue, String nameValue, String description) {
		Option opt = new Option(match, hasValue, nameValue, description);
		options.add(opt);
		return(opt);
	}
 
// getUsage(String other_args)
	public String getUsage(String other_args) {
		String blanks = "            ";
		String result = "";
		for (int i = 0; i < options.size(); i++) {
			Option option = options.get(i);
			result += " ["+option.match+(option.hasValue ? " "+option.nameValue : "")+"]";
		}
		if (other_args != null) result += " "+other_args;
		result += "\r\n";
		for (int i = 0; i < options.size(); i++) {
			Option option = options.get(i);
			String left = option.match+(option.hasValue ? " "+option.nameValue : "");
			if (left.length() < blanks.length()) result += "\r\n"+left+blanks.substring(left.length())+option.description;
			else result += "\r\n"+left+"\r\n"+blanks+option.description;
		}
		return result;
	}
 
// String [] parse(String [] args)
	public String [] parse(String [] args) throws ParserException {
		ArrayList<String> result = new ArrayList<String>();
		for (int j = 0; j < options.size(); j++) {
			Option option = options.get(j);
			option.present = false;
			option.value = null;
		}
 
		for (int i = 0; i < args.length; i++) {
			boolean found = false;
			for (int j = 0; j < options.size(); j++) {
				if ((options.get(j)).match.equals(args[i]))
				{  Option option = options.get(j);
					option.present = true;
					found = true;
					if (option.hasValue)
					{ 
					  i++;
					  if (i < args.length) option.value = args[i];
					  else throw new ParserException("Value is missing for parameter "+option.match);
					}
				}
			}
			if (!found) result.add(args[i]);
		}
		String [] res = new String[result.size()];
		for (int i = 0; i < res.length; i++) res[i] = result.get(i);
		return (res);
	}
 
// hasOption(Option opt)
	public boolean hasOption(Option opt) {
		return opt.present;
	}
 
// getValue(Option opt)
	public String getValue(Option opt) {
		return opt.value;
	}
};