public static String quoteArgument()

in src/main/java/org/apache/commons/exec/util/StringUtils.java [75:99]

• 20 lines of code
• 9 McCabe index (conditional complexity)

    public static String quoteArgument(final String argument) {

        String cleanedArgument = argument.trim();

        // strip the quotes from both ends
        while (cleanedArgument.startsWith(SINGLE_QUOTE) || cleanedArgument.startsWith(DOUBLE_QUOTE)) {
            cleanedArgument = cleanedArgument.substring(1);
        }

        while (cleanedArgument.endsWith(SINGLE_QUOTE) || cleanedArgument.endsWith(DOUBLE_QUOTE)) {
            cleanedArgument = cleanedArgument.substring(0, cleanedArgument.length() - 1);
        }

        final StringBuilder buf = new StringBuilder();
        if (cleanedArgument.contains(DOUBLE_QUOTE)) {
            if (cleanedArgument.contains(SINGLE_QUOTE)) {
                throw new IllegalArgumentException("Can't handle single and double quotes in same argument");
            }
            return buf.append(SINGLE_QUOTE).append(cleanedArgument).append(SINGLE_QUOTE).toString();
        }
        if (cleanedArgument.contains(SINGLE_QUOTE) || cleanedArgument.contains(" ")) {
            return buf.append(DOUBLE_QUOTE).append(cleanedArgument).append(DOUBLE_QUOTE).toString();
        }
        return cleanedArgument;
    }