protected ProgressEvent handleRequest()

in aws-iotwireless-partneraccount/src/main/java/software/amazon/iotwireless/partneraccount/CreateHandler.java [21:58]
34 lines of code
5 McCabe index (conditional complexity)

    protected ProgressEvent<ResourceModel, CallbackContext> handleRequest(
            final AmazonWebServicesClientProxy proxy,
            final ResourceHandlerRequest<ResourceModel> request,
            final CallbackContext callbackContext,
            final ProxyClient<IotWirelessClient> proxyClient,
            final Logger logger) {

        final ResourceModel model = request.getDesiredResourceState();
        final ResourceModel previousModel = request.getPreviousResourceState();
        String clientRequestToken = request.getClientRequestToken();

        if ( model.getArn() != null || model.getSidewalkResponse() != null ) {
            throw new CfnInvalidRequestException("Attempting to set a ReadOnly Property.");
        }

        if (previousModel != null) {
            if (previousModel.getPartnerAccountId().equals(model.getPartnerAccountId())) {
                throw new ResourceAlreadyExistsException(ResourceModel.TYPE_NAME, model.getPartnerAccountId());
            }
        }

        return ProgressEvent.progress(model, callbackContext)
                .then(progress -> proxy.initiate("AWS-IoTWireless-PartnerAccount::Read", proxyClient, model, callbackContext)
                        .translateToServiceRequest(Translator::translateToReadRequest)
                        .makeServiceCall(this::getResource)
                        .progress())
                .then(progress ->
                        proxy.initiate("AWS-IoTWireless-PartnerAccount::Create", proxyClient, model, callbackContext)
                                .translateToServiceRequest(resourceModel -> Translator.translateToCreateRequest(resourceModel, clientRequestToken))
                                .makeServiceCall(this::createResource)
                                .done((response) -> {
                                    model.setSidewalk(Translator.translateToSidewalk(response.sidewalk()));
                                    model.setPartnerAccountId(response.sidewalk().amazonId());
                                    model.setArn(response.arn());
                                    return progress;
                                }))
                .then(progress -> ProgressEvent.defaultSuccessHandler(Translator.setModel(model)));
    }