private String convertPattern()

in src/main/java/org/apache/commons/beanutils2/locale/converters/DateLocaleConverter.java [185:212]

• 25 lines of code
• 10 McCabe index (conditional complexity)

    private String convertPattern(final String pattern, final String fromChars, final String toChars) {
        final StringBuilder converted = new StringBuilder();
        boolean quoted = false;

        for (int i = 0; i < pattern.length(); ++i) {
            char thisChar = pattern.charAt(i);
            if (quoted) {
                if (thisChar == '\'') {
                    quoted = false;
                }
            } else if (thisChar == '\'') {
                quoted = true;
            } else if (thisChar >= 'a' && thisChar <= 'z' || thisChar >= 'A' && thisChar <= 'Z') {
                final int index = fromChars.indexOf(thisChar);
                if (index == -1) {
                    throw new IllegalArgumentException("Illegal pattern character '" + thisChar + "'");
                }
                thisChar = toChars.charAt(index);
            }
            converted.append(thisChar);
        }

        if (quoted) {
            throw new IllegalArgumentException("Unfinished quote in pattern");
        }

        return converted.toString();
    }