/// <summary>
/// Fetches the attributes for the category from the AE server.
/// </summary>
private List <EventAttribute> LoadEventAttributes(ComAeClient client, int eventTypeId, int categoryId)
{
List <EventAttribute> attributes = new List <EventAttribute>();
int[] ids = null;
string[] descriptions = null;
short[] dataTypes = null;
try
{
client.GetEventAttributes(categoryId, out ids, out descriptions, out dataTypes);
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error fetching event attributes.");
ids = null;
}
if (ids != null)
{
for (int ii = 0; ii < ids.Length; ii++)
{
EventAttribute attribute = new EventAttribute();
attribute.Id = ids[ii];
attribute.Description = descriptions[ii];
attribute.VarType = dataTypes[ii];
attributes.Add(attribute);
}
}
return(attributes);
}
/// <summary>
/// Fetches the attributes for the category from the AE server.
/// </summary>
private List<EventAttribute> LoadEventAttributes(ComAeClient client, int eventTypeId, int categoryId)
{
List<EventAttribute> attributes = new List<EventAttribute>();
int[] ids = null;
string[] descriptions = null;
short[] dataTypes = null;
try
{
client.GetEventAttributes(categoryId, out ids, out descriptions, out dataTypes);
}
catch (Exception e)
{
Utils.Trace(e, "Unexpected error fetching event attributes.");
ids = null;
}
if (ids != null)
{
for (int ii = 0; ii < ids.Length; ii++)
{
EventAttribute attribute = new EventAttribute();
attribute.Id = ids[ii];
attribute.Description = descriptions[ii];
attribute.VarType = dataTypes[ii];
attributes.Add(attribute);
}
}
return attributes;
}
/// <summary>
/// Dispatches the event.
/// </summary>
private BaseEventState DispatchEvent(ONEVENTSTRUCT e)
{
NodeId typeId = AeParsedNodeId.Construct(e.dwEventType, e.dwEventCategory, e.szConditionName, m_namespaceIndex);
// find the type.
AeEventTypeState eventType = m_cache.FindType(m_defaultContext, typeId);
if (eventType == null)
{
return(null);
}
// create a new instance.
BaseEventState instance = m_cache.CreateInstance(m_defaultContext, eventType);
if (instance == null)
{
return(null);
}
// fill in fields.
UpdateBaseEvent(instance, eventType.EventType, e);
if (instance is AuditEventState)
{
UpdateAuditEvent((AuditEventState)instance, eventType.EventType, e);
}
if (instance is AlarmConditionState)
{
UpdateAlarm((AlarmConditionState)instance, eventType.EventType, e);
}
if (instance is ExclusiveLimitAlarmState)
{
UpdateExclusiveLimitAlarm((ExclusiveLimitAlarmState)instance, eventType.EventType, e);
}
else if (instance is NonExclusiveLimitAlarmState)
{
UpdateNonExclusiveLimitAlarm((NonExclusiveLimitAlarmState)instance, eventType.EventType, e);
}
// process attributes.
bool ackCommentFound = false;
object[] values = ComUtils.GetVARIANTs(ref e.pEventAttributes, e.dwNumEventAttrs, false);
for (int ii = 0; ii < eventType.EventType.Attributes.Count; ii++)
{
EventAttribute attribute = eventType.EventType.Attributes[ii];
if (ii >= e.dwNumEventAttrs)
{
continue;
}
if (!ackCommentFound && AeTypeCache.IsKnownName(attribute.Description, "ACK COMMENT"))
{
ConditionState condition = instance as ConditionState;
if (condition != null)
{
condition.Comment = new ConditionVariableState <LocalizedText>(condition);
condition.Comment.BrowseName = Opc.Ua.BrowseNames.Comment;
condition.Comment.Value = new LocalizedText(values[ii] as string);
}
ackCommentFound = true;
continue;
}
PropertyState property = new PropertyState(instance);
property.SymbolicName = attribute.Description;
property.BrowseName = new QualifiedName(property.SymbolicName, m_namespaceIndex);
property.Value = values[ii];
instance.AddChild(property);
}
return(instance);
}