private void parseContentType()

in core/src/main/java/org/apache/james/mime4j/stream/FallbackBodyDescriptorBuilder.java [149:206]
53 lines of code
15 McCabe index (conditional complexity)

    private void parseContentType(Field field) throws MimeException {
        RawField rawfield;
        if (field instanceof RawField) {
            rawfield = ((RawField) field);
        } else {
            rawfield = new RawField(field.getName(), field.getBody());
        }
        RawBody body = RawFieldParser.DEFAULT.parseRawBody(rawfield);
        String main = body.getValue();
        Map<String, String> params = new HashMap<String, String>();
        for (NameValuePair nmp: body.getParams()) {
            String name = nmp.getName().toLowerCase(Locale.US);
            params.put(name, nmp.getValue());
        }

        String type = null;
        String subtype = null;
        if (main != null) {
            main = main.toLowerCase().trim();
            int index = main.indexOf('/');
            boolean valid = false;
            if (index != -1) {
                type = main.substring(0, index).trim();
                subtype = main.substring(index + 1).trim();
                if (type.length() > 0 && subtype.length() > 0) {
                    main = type + "/" + subtype;
                    valid = true;
                }
            }

            if (!valid) {
                main = null;
                type = null;
                subtype = null;
            }
        }
        String b = params.get("boundary");

        boolean multipart = main != null && main.startsWith("multipart/");
        if (multipart && b != null || !multipart) {
            mimeType = main;
            mediaType = type;
            subType = subtype;
        }

        if (MimeUtil.isMultipart(mimeType)) {
            boundary = b;
        }

        String c = params.get("charset");
        charset = null;
        if (c != null) {
            c = c.trim();
            if (c.length() > 0) {
                charset = c;
            }
        }
    }