private String decodeAuto()

in codec/src/main/java/org/apache/mina/codec/textline/TextLineDecoder.java [188:257]
52 lines of code
8 McCabe index (conditional complexity)

    private String decodeAuto(Context ctx, ByteBuffer in) {
        String decoded = null;
        int matchCount = ctx.getMatchCount();

        // Try to find a match
        int oldPos = in.position();
        int oldLimit = in.limit();

        while (in.hasRemaining() && decoded == null) {
            byte b = in.get();
            boolean matched = false;

            switch (b) {
            case '\r':
                // Might be Mac, but we don't auto-detect Mac EOL
                // to avoid confusion.
                matchCount++;
                break;

            case '\n':
                // UNIX
                matchCount++;
                matched = true;
                break;

            default:
                matchCount = 0;
            }

            if (matched) {
                // Found a match.
                int pos = in.position();
                in.limit(pos);
                in.position(oldPos);

                ctx.append(in);

                in.limit(oldLimit);
                in.position(pos);

                try {
                    if (ctx.getOverflowLength() == 0) {
                        ByteBuffer buf = ctx.getBuffer();
                        buf.flip();
                        buf.limit(buf.limit() - matchCount);

                        CharsetDecoder decoder = ctx.getDecoder();
                        CharBuffer buffer = decoder.decode(buf);
                        decoded = buffer.toString();
                    } else {
                        int overflowPosition = ctx.getOverflowLength();
                        throw new IllegalStateException("Line is too long: " + overflowPosition);
                    }
                } catch (CharacterCodingException cce) {
                    throw new ProtocolDecoderException(cce);
                } finally {
                    ctx.reset();
                }
                oldPos = pos;
                matchCount = 0;
            }
        }

        // Put remainder to buf.
        in.position(oldPos);
        ctx.append(in);

        ctx.setMatchCount(matchCount);
        return decoded;
    }