private Attach readAttach()

in protonj2/src/main/java/org/apache/qpid/protonj2/codec/decoders/transport/AttachTypeDecoder.java [84:160]
66 lines of code
21 McCabe index (conditional complexity)

    private Attach readAttach(ProtonBuffer buffer, Decoder decoder, DecoderState state, ListTypeDecoder listDecoder) throws DecodeException {
        final Attach attach = new Attach();

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

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

        if (count > MAX_ATTACH_LIST_ENTRIES) {
            throw new DecodeException("To many entries in Attach 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 < MIN_ATTACH_LIST_ENTRIES) {
                    throw new DecodeException(errorForMissingRequiredFields(index));
                }

                buffer.advanceReadOffset(1);
                continue;
            }

            switch (index) {
                case 0:
                    attach.setName(decoder.readString(buffer, state));
                    break;
                case 1:
                    attach.setHandle(decoder.readUnsignedInteger(buffer, state, 0l));
                    break;
                case 2:
                    attach.setRole(decoder.readBoolean(buffer, state, false) ? Role.RECEIVER : Role.SENDER);
                    break;
                case 3:
                    attach.setSenderSettleMode(SenderSettleMode.valueOf(decoder.readUnsignedByte(buffer, state, (byte) 2)));
                    break;
                case 4:
                    attach.setReceiverSettleMode(ReceiverSettleMode.valueOf(decoder.readUnsignedByte(buffer, state, (byte) 0)));
                    break;
                case 5:
                    attach.setSource(decoder.readObject(buffer, state, Source.class));
                    break;
                case 6:
                    attach.setTarget(decoder.readObject(buffer, state, Terminus.class));
                    break;
                case 7:
                    attach.setUnsettled(decoder.readMap(buffer, state));
                    break;
                case 8:
                    attach.setIncompleteUnsettled(decoder.readBoolean(buffer, state, true));
                    break;
                case 9:
                    attach.setInitialDeliveryCount(decoder.readUnsignedInteger(buffer, state, 0l));
                    break;
                case 10:
                    attach.setMaxMessageSize(decoder.readUnsignedLong(buffer, state));
                    break;
                case 11:
                    attach.setOfferedCapabilities(decoder.readMultiple(buffer, state, Symbol.class));
                    break;
                case 12:
                    attach.setDesiredCapabilities(decoder.readMultiple(buffer, state, Symbol.class));
                    break;
                case 13:
                    attach.setProperties(decoder.readMap(buffer, state));
                    break;
            }
        }

        return attach;
    }