/// <summary>
        /// Updates the non-exclusive limit event.
        /// </summary>
        private void UpdateNonExclusiveLimitAlarm(NonExclusiveLimitAlarmState instance, EventType eventType, ONEVENTSTRUCT e)
        {
            bool active = (e.wNewState & Constants.CONDITION_ACTIVE) != 0;
            TwoStateVariableState state = null;

            if (AeTypeCache.IsKnownName(e.szConditionName, "HI HI"))
            {
                instance.HighHighState = state = new TwoStateVariableState(instance);
                instance.HighHighState.BrowseName = Opc.Ua.BrowseNames.HighHighState;
            }

            else if (AeTypeCache.IsKnownName(e.szSubconditionName, "HI") || AeTypeCache.IsKnownName(e.szSubconditionName, "DV HI"))
            {
                instance.HighState = state = new TwoStateVariableState(instance);
                instance.HighState.BrowseName = Opc.Ua.BrowseNames.HighState;
            }

            else if (AeTypeCache.IsKnownName(e.szSubconditionName, "LO") || AeTypeCache.IsKnownName(e.szSubconditionName, "DV LO"))
            {
                instance.LowState = state = new TwoStateVariableState(instance);
                instance.LowState.BrowseName = Opc.Ua.BrowseNames.LowState;
            }

            else if (AeTypeCache.IsKnownName(e.szSubconditionName, "LO LO"))
            {
                instance.LowLowState = state = new TwoStateVariableState(instance);
                instance.LowLowState.BrowseName = Opc.Ua.BrowseNames.LowLowState;
            }

            if (state != null)
            {
                state.Value = new LocalizedText((active) ? ConditionStateNames.Active : ConditionStateNames.Inactive);
                state.SetChildValue(m_defaultContext, Opc.Ua.BrowseNames.Id, active, false);
            }
        }
Esempio n. 2
0
        /// <summary>
        /// Constructs an event object from a notification.
        /// </summary>
        /// <param name="session">The session.</param>
        /// <param name="monitoredItem">The monitored item that produced the notification.</param>
        /// <param name="notification">The notification.</param>
        /// <param name="eventTypeMappings">Mapping between event types and known event types.</param>
        /// <returns>
        /// The event object. Null if the notification is not a valid event type.
        /// </returns>
        public static BaseEventState ConstructEvent(
            Session session,
            MonitoredItem monitoredItem,
            EventFieldList notification,
            Dictionary<NodeId,NodeId> eventTypeMappings)
        {
            // find the event type.
            NodeId eventTypeId = FindEventType(monitoredItem, notification);

            if (eventTypeId == null)
            {
                return null;
            }

            // look up the known event type.
            NodeId knownTypeId = null;

            if (!eventTypeMappings.TryGetValue(eventTypeId, out knownTypeId))
            {
                // check for a known type
                for (int jj = 0; jj < KnownEventTypes.Length; jj++)
                {
                    if (KnownEventTypes[jj] == eventTypeId)
                    {
                        knownTypeId = eventTypeId;
                        eventTypeMappings.Add(eventTypeId, eventTypeId);
                        break;
                    }
                }
                
                // browse for the supertypes of the event type.
                if (knownTypeId == null)
                {
                    ReferenceDescriptionCollection supertypes = FormUtils.BrowseSuperTypes(session, eventTypeId, false);

                    // can't do anything with unknown types.
                    if (supertypes == null)
                    {
                        return null;
                    }

                    // find the first supertype that matches a known event type.
                    for (int ii = 0; ii < supertypes.Count; ii++)
                    {
                        for (int jj = 0; jj < KnownEventTypes.Length; jj++)
                        {
                            if (KnownEventTypes[jj] == supertypes[ii].NodeId)
                            {
                                knownTypeId = KnownEventTypes[jj];
                                eventTypeMappings.Add(eventTypeId, knownTypeId);
                                break;
                            }
                        }

                        if (knownTypeId != null)
                        {
                            break;
                        }
                    }
                }
            }

            if (knownTypeId == null)
            {
                return null;
            }

            // all of the known event types have a UInt32 as identifier.
            uint? id = knownTypeId.Identifier as uint?;

            if (id == null)
            {
                return null;
            }

            // construct the event based on the known event type.
            BaseEventState e = null;

            switch (id.Value)
            {
                case ObjectTypes.ConditionType: { e = new ConditionState(null); break; }
                case ObjectTypes.DialogConditionType: { e = new DialogConditionState(null); break; }
                case ObjectTypes.AlarmConditionType: { e = new AlarmConditionState(null); break; }
                case ObjectTypes.ExclusiveLimitAlarmType: { e = new ExclusiveLimitAlarmState(null); break; }
                case ObjectTypes.NonExclusiveLimitAlarmType: { e = new NonExclusiveLimitAlarmState(null); break; }
                case ObjectTypes.AuditEventType: { e = new AuditEventState(null); break; }
                case ObjectTypes.AuditUpdateMethodEventType: { e = new AuditUpdateMethodEventState(null); break; }

                default:
                {
                    e = new BaseEventState(null);
                    break;
                }
            }

            // get the filter which defines the contents of the notification.
            EventFilter filter = monitoredItem.Status.Filter as EventFilter;

            // initialize the event with the values in the notification.
            e.Update(session.SystemContext, filter.SelectClauses, notification);

            // save the orginal notification.
            e.Handle = notification;

            return e;
        }