private String quoteTimeStampChars()

in src/main/java/org/apache/log4j/varia/LogFilePatternReceiver.java [816:840]

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

    private String quoteTimeStampChars(String input) {
        //put single quotes around text that isn't a supported dateformat char
        StringBuilder result = new StringBuilder();
        //ok to default to false because we also check for index zero below
        boolean lastCharIsDateFormat = false;
        for (int i = 0; i < input.length(); i++) {
            String thisVal = input.substring(i, i + 1);
            boolean thisCharIsDateFormat = VALID_DATEFORMAT_CHARS.contains(thisVal);
            //we have encountered a non-dateformat char
            if (!thisCharIsDateFormat && (i == 0 || lastCharIsDateFormat)) {
                result.append("'");
            }
            //we have encountered a dateformat char after previously encountering a non-dateformat char
            if (thisCharIsDateFormat && i > 0 && !lastCharIsDateFormat) {
                result.append("'");
            }
            lastCharIsDateFormat = thisCharIsDateFormat;
            result.append(thisVal);
        }
        //append an end single-quote if we ended with non-dateformat char
        if (!lastCharIsDateFormat) {
            result.append("'");
        }
        return result.toString();
    }