private Begin readBegin()

in protonj2/src/main/java/org/apache/qpid/protonj2/codec/decoders/transport/BeginTypeDecoder.java [79:137]
48 lines of code
15 McCabe index (conditional complexity)

    private Begin readBegin(ProtonBuffer buffer, Decoder decoder, DecoderState state, ListTypeDecoder listDecoder) throws DecodeException {
        final Begin begin = new Begin();

        @SuppressWarnings("unused")
        final int size = listDecoder.readSize(buffer, state);
        final int count = listDecoder.readCount(buffer, state);

        if (count < MIN_BEGIN_LIST_ENTRIES) {
            throw new DecodeException(errorForMissingRequiredFields(count));
        }

        if (count > MAX_BEGIN_LIST_ENTRIES) {
            throw new DecodeException("To many entries in Begin list encoding: " + count);
        }

        for (int index = 0; index < count; ++index) {
            // Peek ahead and see if there is a null in the next slot, if so we don't call
            // the setter for that entry to ensure the returned type reflects the encoded
            // state in the modification entry.
            if (buffer.peekByte() == EncodingCodes.NULL) {
                // Ensure mandatory fields are set
                if (index > 0 && index < MIN_BEGIN_LIST_ENTRIES) {
                    throw new DecodeException(errorForMissingRequiredFields(index));
                }

                buffer.advanceReadOffset(1);
                continue;
            }

            switch (index) {
                case 0:
                    begin.setRemoteChannel(decoder.readUnsignedShort(buffer, state, 0));
                    break;
                case 1:
                    begin.setNextOutgoingId(decoder.readUnsignedInteger(buffer, state, 0l));
                    break;
                case 2:
                    begin.setIncomingWindow(decoder.readUnsignedInteger(buffer, state, 0l));
                    break;
                case 3:
                    begin.setOutgoingWindow(decoder.readUnsignedInteger(buffer, state, 0l));
                    break;
                case 4:
                    begin.setHandleMax(decoder.readUnsignedInteger(buffer, state, 0l));
                    break;
                case 5:
                    begin.setOfferedCapabilities(decoder.readMultiple(buffer, state, Symbol.class));
                    break;
                case 6:
                    begin.setDesiredCapabilities(decoder.readMultiple(buffer, state, Symbol.class));
                    break;
                case 7:
                    begin.setProperties(decoder.readMap(buffer, state));
                    break;
            }
        }

        return begin;
    }