public static Map parseNameValuePairList()

in freemarker-core/src/main/java/freemarker/template/utility/StringUtil.java [1577:1724]

• 126 lines of code
• 28 McCabe index (conditional complexity)

    public static Map parseNameValuePairList(String s, String defaultValue)
    throws java.text.ParseException {
        Map map = new HashMap();
        
        char c = ' ';
        int ln = s.length();
        int p = 0;
        int keyStart;
        int valueStart;
        String key;
        String value;
        
        fetchLoop: while (true) {
            // skip ws
            while (p < ln) {
                c = s.charAt(p);
                if (!Character.isWhitespace(c)) {
                    break;
                }
                p++;
            }
            if (p == ln) {
                break fetchLoop;
            }
            keyStart = p;

            // seek key end
            while (p < ln) {
                c = s.charAt(p);
                if (!(Character.isLetterOrDigit(c) || c == '_')) {
                    break;
                }
                p++;
            }
            if (keyStart == p) {
                throw new java.text.ParseException(
                       "Expecting letter, digit or \"_\" "
                        + "here, (the first character of the key) but found "
                        + jQuote(String.valueOf(c))
                        + " at position " + p + ".",
                        p);
            }
            key = s.substring(keyStart, p);

            // skip ws
            while (p < ln) {
                c = s.charAt(p);
                if (!Character.isWhitespace(c)) {
                    break;
                }
                p++;
            }
            if (p == ln) {
                if (defaultValue == null) {
                    throw new java.text.ParseException(
                            "Expecting \":\", but reached "
                            + "the end of the string "
                            + " at position " + p + ".",
                            p);
                }
                value = defaultValue;
            } else if (c != ':') {
                if (defaultValue == null || c != ',') {
                    throw new java.text.ParseException(
                            "Expecting \":\" here, but found "
                            + jQuote(String.valueOf(c))
                            + " at position " + p + ".",
                            p);
                }

                // skip ","
                p++;
                
                value = defaultValue;
            } else {
                // skip ":"
                p++;
    
                // skip ws
                while (p < ln) {
                    c = s.charAt(p);
                    if (!Character.isWhitespace(c)) {
                        break;
                    }
                    p++;
                }
                if (p == ln) {
                    throw new java.text.ParseException(
                            "Expecting the value of the key "
                            + "here, but reached the end of the string "
                            + " at position " + p + ".",
                            p);
                }
                valueStart = p;
    
                // seek value end
                while (p < ln) {
                    c = s.charAt(p);
                    if (!(Character.isLetterOrDigit(c) || c == '_')) {
                        break;
                    }
                    p++;
                }
                if (valueStart == p) {
                    throw new java.text.ParseException(
                            "Expecting letter, digit or \"_\" "
                            + "here, (the first character of the value) "
                            + "but found "
                            + jQuote(String.valueOf(c))
                            + " at position " + p + ".",
                            p);
                }
                value = s.substring(valueStart, p);

                // skip ws
                while (p < ln) {
                    c = s.charAt(p);
                    if (!Character.isWhitespace(c)) {
                        break;
                    }
                    p++;
                }
                
                // skip ","
                if (p < ln) {
                    if (c != ',') {
                        throw new java.text.ParseException(
                                "Excpecting \",\" or the end "
                                + "of the string here, but found "
                                + jQuote(String.valueOf(c))
                                + " at position " + p + ".",
                                p);
                    } else {
                        p++;
                    }
                }
            }
            
            // store the key-value pair
            if (map.put(key, value) != null) {
                throw new java.text.ParseException(
                        "Dublicated key: "
                        + jQuote(key), keyStart);
            }
        }
        
        return map;
    }