public CommandLine parseCommandLineOptions()

in core/src/main/java/org/apache/commons/jelly/util/CommandLineParser.java [155:206]
34 lines of code
10 McCabe index (conditional complexity)

    public CommandLine parseCommandLineOptions(String[] args) throws ParseException {
        // create the expected options
        cmdLineOptions = new Options();
        cmdLineOptions.addOption("o", true, "Output file");
        cmdLineOptions.addOption("script", true, "Jelly script to run");
        cmdLineOptions.addOption("h", "help", false, "Give this help message");
        cmdLineOptions.addOption("v", "version", false, "prints Jelly's version and exits");
        cmdLineOptions.addOption("script", true, "Jelly script to run");
        cmdLineOptions.addOption("awt", false, "Wether to run in the AWT thread.");
        cmdLineOptions.addOption("swing", false, "Synonym of \"-awt\".");
        List builtinOptionNames = Arrays.asList(new String[] { "-o", "-script", "-h", "--help", "-v", "--version", "-awt", "-swing" });

        // -D options will be added to the system properties
        Properties sysProps = System.getProperties();

        // filter the system property setting from the arg list
        // before passing it to the CLI parser
        ArrayList filteredArgList = new ArrayList();

        for (int i = 0; i < args.length; i++) {
            String arg = args[i];

            // if this is a -D property parse it and add it to the system properties.
            // -D args will not be copied into the filteredArgList.
            if (arg.startsWith("-D") && (arg.length() > 2)) {
                arg = arg.substring(2);
                int ePos = arg.indexOf("=");
                if (ePos == -1 || ePos == 0 || ePos == arg.length() - 1)
                    System.err.println("Invalid system property: \"" + arg + "\".");
                sysProps.setProperty(arg.substring(0, ePos), arg.substring(ePos + 1));
            } else {
                // add this to the filtered list of arguments
                filteredArgList.add(arg);

                // add additional "-?" options to the options object. if this is not done
                // the only options allowed would be the builtin-ones.
                if (arg.startsWith("-") && arg.length() > 1) {
                    if (!(builtinOptionNames.contains(arg))) {
                        cmdLineOptions.addOption(arg.substring(1, arg.length()), true, "dynamic option");
                    }
                }
            }
        }

        // make the filteredArgList into an array
        String[] filterArgs = new String[filteredArgList.size()];
        filteredArgList.toArray(filterArgs);

        // parse the command line
        Parser parser = new org.apache.commons.cli.GnuParser();
        return parser.parse(cmdLineOptions, filterArgs);
    }