private static RegistrationPipelineState GetFirstStageState(DeclarationDocflowState declarationDocflowState)
        {
            switch (declarationDocflowState)
            {
                case DeclarationDocflowState.Unknown:
                    return RegistrationPipelineState.CreatedDeclaration;
                case DeclarationDocflowState.Sent:
                case DeclarationDocflowState.HasFailedTransaction:
                case DeclarationDocflowState.HasSuccessfulTransaction:
                    return RegistrationPipelineState.SentDeclaration;
                case DeclarationDocflowState.Successful:
                    return RegistrationPipelineState.AcceptedDeclaration;
                case DeclarationDocflowState.Failed:
                    return RegistrationPipelineState.RejectedDeclaration;
                default:
                    throw new ArgumentOutOfRangeException(nameof(declarationDocflowState), declarationDocflowState, null);
            }
        }

        private static RegistrationPipelineState GetSecondStageState(DeclarationDemandDocflowState declarationDemandDocflowState)
        {
            switch (declarationDemandDocflowState)
            {
                case DeclarationDemandDocflowState.Unknown:
                    return RegistrationPipelineState.SentDeclaration;
                case DeclarationDemandDocflowState.AcceptedDeclaration:
                    return RegistrationPipelineState.AcceptedDeclarationDemand;
                case DeclarationDemandDocflowState.RejectedDeclaration:
                    return RegistrationPipelineState.RejectedDeclarationDemand;
                default:
                    throw new ArgumentOutOfRangeException(nameof(declarationDemandDocflowState), declarationDemandDocflowState, null);
            }
        }

        private static RegistrationPipelineState GetThirdStageState(ReportDocflowState reportDocflowState)
        {
            switch (reportDocflowState)
            {
                case ReportDocflowState.Unknown:
                    return RegistrationPipelineState.ReportCreated;
                case ReportDocflowState.Sent:
                case ReportDocflowState.HasFailedTransaction:
                case ReportDocflowState.HasSuccessfulTransaction:
                    return RegistrationPipelineState.ReportSent;
                case ReportDocflowState.Successful:
                    return RegistrationPipelineState.ReportAccepted;
                case ReportDocflowState.Failed:
                    return RegistrationPipelineState.ReportRejected;
                default:
                    throw new ArgumentOutOfRangeException(nameof(reportDocflowState), reportDocflowState, null);
            }
        }

        private static RegistrationPipelineState GetState(
            DeclarationDocflowState declarationDocflowState,
            DeclarationDemandDocflowState declarationDemandDocflowState,
            ReportDocflowState reportDocflowState)
        {
            try
            {
                var lastStage = GetFirstStageState(declarationDocflowState);
                if (lastStage != RegistrationPipelineState.AcceptedDeclaration)
                {
                    lastStage = GetSecondStageState(declarationDemandDocflowState);
                    if (lastStage != RegistrationPipelineState.AcceptedDeclarationDemand)
                    {
                        lastStage = GetThirdStageState(reportDocflowState);
                        if (lastStage != RegistrationPipelineState.ReportAccepted)
                        {
                            //lastStage = GetForthState(reportDemandDocflowState);
                        }
                    }
                }
                return lastStage;
            }
            catch (ArgumentOutOfRangeException e)
            {
                throw new IllegalProgramException("Unknown RegistrationPipelineState")
                    .AddData("DeclarationDocflowState", declarationDocflowState)
                    .AddData("DeclarationDemandDocflowState", declarationDemandDocflowState)
                    .AddData("ReportDocflowState", reportDocflowState)
                    .AddData("Exception", e);
            }
        }