protected void parse()

in main/src/main/java/org/apache/james/jdkim/tagvalue/TagValue.java [140:188]
41 lines of code
12 McCabe index (conditional complexity)

    protected void parse(String data) {
        for (int i = 0; i < data.length(); i++) {
            int equal = data.indexOf('=', i);
            if (equal == -1) {
                // TODO check whether this is correct or not
                // this allow FWS/WSP after the final ";"
                String rest = data.substring(i);
                if (rest.length() > 0
                        && trimFWS(rest, 0, rest.length() - 1, true).length() > 0) {
                    throw new IllegalStateException(
                            "Unexpected termination at position " + i + ": "
                                    + data + " | [" + rest + "]");
                }
                i = data.length();
                continue;
            }
            // we could start from "equals" but we start from "i" in
            // order to spot invalid values before validation.
            int next = data.indexOf(';', i);
            if (next == -1) {
                next = data.length();
            }

            if (equal > next) {
                throw new IllegalStateException("Found ';' before '=' in "
                        + data);
            }

            CharSequence tag = trimFWS(data, i, equal - 1, true).toString();
            if (VALIDATION && !tagPattern.matcher(tag).matches()) {
                throw new IllegalStateException("Syntax error in tag: " + tag);
            }
            String tagString = tag.toString();
            if (tagValues.containsKey(tagString)) {
                throw new IllegalStateException(
                        "Syntax error (duplicate tag): " + tag);
            }

            CharSequence value = trimFWS(data, equal + 1, next - 1, true);
            if (VALIDATION && !valuePattern.matcher(value).matches()) {
                throw new IllegalStateException("Syntax error in value: "
                        + value);
            }

            tagValues.put(tagString, value);
            i = next;
        }
        this.stringRepresentation  = data;
    }