Opc.Ua.AlarmConditionState.OnUnshelve C# (CSharp) Method

        protected virtual ServiceResult OnUnshelve(
            ISystemContext context,
            MethodState method,
            IList<object> inputArguments,
            IList<object> outputArguments)
        {
            ServiceResult error = null;

            try
            {
                if (!this.EnabledState.Id.Value)
                {
                    return error = StatusCodes.BadConditionDisabled;
                }

                if (!this.ShelvingState.IsCausePermitted(context, Methods.ShelvedStateMachineType_Unshelve, false))
                {
                    return error = StatusCodes.BadConditionNotShelved;
                }

                if (OnShelve == null)
                {
                    return error = StatusCodes.BadNotSupported;
                }

                error = OnShelve(context, this, false, false, 0);

                // report a state change event.
                if (ServiceResult.IsGood(error))
                {
                    ReportStateChange(context, false);
                }
            }
            finally
            {
                // raise the audit event.
                if (this.AreEventsMonitored)
                {
                    AuditConditionShelvingEventState e = new AuditConditionShelvingEventState(null);

                    TranslationInfo info = new TranslationInfo(
                        "AuditConditionUnshelve",
                        "en-US",
                        "The Unshelve method was called.");

                    e.Initialize(
                        context,
                        this,
                        EventSeverity.Low,
                        new LocalizedText(info),
                        ServiceResult.IsGood(error),
                        DateTime.UtcNow);

                    e.SourceName.Value = "Attribute/Call";

                    e.MethodId = new PropertyState<NodeId>(e);
                    e.MethodId.Value = method.NodeId;

                    ReportEvent(context, e);
                }
            }

            return error;
        }
        #endregion