protected String decodeText()

in src/main/java/org/apache/commons/codec/net/RFC1522Codec.java [79:110]

32 lines of code
8 McCabe index (conditional complexity)


    protected String decodeText(final String text) throws DecoderException, UnsupportedEncodingException {
        if (text == null) {
            return null;
        }
        if (!text.startsWith(PREFIX) || !text.endsWith(POSTFIX)) {
            throw new DecoderException("RFC 1522 violation: malformed encoded content");
        }
        final int terminator = text.length() - 2;
        int from = 2;
        int to = text.indexOf(SEP, from);
        if (to == terminator) {
            throw new DecoderException("RFC 1522 violation: charset token not found");
        }
        final String charset = text.substring(from, to);
        if (charset.isEmpty()) {
            throw new DecoderException("RFC 1522 violation: charset not specified");
        }
        from = to + 1;
        to = text.indexOf(SEP, from);
        if (to == terminator) {
            throw new DecoderException("RFC 1522 violation: encoding token not found");
        }
        final String encoding = text.substring(from, to);
        if (!getEncoding().equalsIgnoreCase(encoding)) {
            throw new DecoderException("This codec cannot decode " + encoding + " encoded content");
        }
        from = to + 1;
        to = text.indexOf(SEP, from);
        byte[] data = StringUtils.getBytesUsAscii(text.substring(from, to));
        data = doDecoding(data);
        return new String(data, charset);
    }