public ParsedCommandLine parse()

in maven-wrapper/src/main/java/org/apache/maven/wrapper/cli/CommandLineParser.java [97:157]
57 lines of code
12 McCabe index (conditional complexity)

    public ParsedCommandLine parse(Iterable<String> commandLine) throws CommandLineArgumentException {
        ParsedCommandLine parsedCommandLine =
                new ParsedCommandLine(new HashSet<CommandLineOption>(optionsByString.values()));
        ParserState parseState = new BeforeFirstSubCommand(parsedCommandLine);
        for (String arg : commandLine) {
            if (parseState.maybeStartOption(arg)) {
                if ("--".equals(arg)) {
                    parseState = new AfterOptions(parsedCommandLine);
                } else if (arg.matches("--[^=]+")) {
                    OptionParserState parsedOption = parseState.onStartOption(arg, arg.substring(2));
                    parseState = parsedOption.onStartNextArg();
                } else if (arg.matches("--[^=]+=.*")) {
                    int endArg = arg.indexOf('=');
                    OptionParserState parsedOption = parseState.onStartOption(arg, arg.substring(2, endArg));
                    parseState = parsedOption.onArgument(arg.substring(endArg + 1));
                } else if (arg.matches("-[^=]=.*")) {
                    OptionParserState parsedOption = parseState.onStartOption(arg, arg.substring(1, 2));
                    parseState = parsedOption.onArgument(arg.substring(3));
                } else {
                    assert arg.matches("-[^-].*");
                    String option = arg.substring(1);
                    if (optionsByString.containsKey(option)) {
                        OptionParserState parsedOption = parseState.onStartOption(arg, option);
                        parseState = parsedOption.onStartNextArg();
                    } else {
                        String option1 = arg.substring(1, 2);
                        OptionParserState parsedOption;
                        if (optionsByString.containsKey(option1)) {
                            parsedOption = parseState.onStartOption("-" + option1, option1);
                            if (parsedOption.getHasArgument()) {
                                parseState = parsedOption.onArgument(arg.substring(2));
                            } else {
                                parseState = parsedOption.onComplete();
                                for (int i = 2; i < arg.length(); i++) {
                                    String optionStr = arg.substring(i, i + 1);
                                    parsedOption = parseState.onStartOption("-" + optionStr, optionStr);
                                    parseState = parsedOption.onComplete();
                                }
                            }
                        } else {
                            if (allowUnknownOptions) {
                                // if we are allowing unknowns, just pass through the whole arg
                                parsedOption = parseState.onStartOption(arg, option);
                                parseState = parsedOption.onComplete();
                            } else {
                                // We are going to throw a CommandLineArgumentException below, but want the message
                                // to reflect that we didn't recognise the first char (i.e. the option specifier)
                                parsedOption = parseState.onStartOption("-" + option1, option1);
                                parseState = parsedOption.onComplete();
                            }
                        }
                    }
                }
            } else {
                parseState = parseState.onNonOption(arg);
            }
        }

        parseState.onCommandLineEnd();
        return parsedCommandLine;
    }