/// <summary>
/// Updates the exclusive limit alarm event.
/// </summary>
private void UpdateExclusiveLimitAlarm(ExclusiveLimitAlarmState instance, EventType eventType, ONEVENTSTRUCT e)
{
NodeId state = null;
string text = null;
if (AeTypeCache.IsKnownName(e.szSubconditionName, "HI HI"))
{
state = Opc.Ua.ObjectIds.ExclusiveLimitStateMachineType_HighHigh;
text = ConditionStateNames.HighHighActive;
}
if (AeTypeCache.IsKnownName(e.szSubconditionName, "HI"))
{
state = Opc.Ua.ObjectIds.ExclusiveLimitStateMachineType_High;
text = ConditionStateNames.HighActive;
}
if (AeTypeCache.IsKnownName(e.szSubconditionName, "LO"))
{
state = Opc.Ua.ObjectIds.ExclusiveLimitStateMachineType_Low;
text = ConditionStateNames.LowActive;
}
if (AeTypeCache.IsKnownName(e.szSubconditionName, "LO LO"))
{
state = Opc.Ua.ObjectIds.ExclusiveLimitStateMachineType_LowLow;
text = ConditionStateNames.LowLowActive;
}
instance.LimitState = new ExclusiveLimitStateMachineState(instance);
instance.LimitState.BrowseName = Opc.Ua.BrowseNames.LimitState;
instance.LimitState.CurrentState = new FiniteStateVariableState(instance.LimitState);
instance.LimitState.CurrentState.BrowseName = Opc.Ua.BrowseNames.CurrentState;
instance.LimitState.CurrentState.Value = text;
instance.LimitState.CurrentState.SetChildValue(m_defaultContext, Opc.Ua.BrowseNames.Id, state, false);
}
/// <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;
}