/// <summary>
/// Add detection source to the tag, sorted by RSSI
/// </summary>
/// <param name="detectedTag"></param>
/// <param name="newDetectionSource"></param>
private static void AddAndSortDetectionSource(ref Tag detectedTag, DetectionSource newDetectionSource)
{
int newDetectionSourceSortingPointer = 0;
DetectionSource previousDetectionSource = null;
try
{
previousDetectionSource = detectedTag.DetectionSources.First(detectionSource => detectionSource.RSSI <= newDetectionSource.RSSI);
}
catch (InvalidOperationException) { }
if (previousDetectionSource != null)
{
newDetectionSourceSortingPointer = detectedTag.DetectionSources.IndexOf(previousDetectionSource) - 1;
}
if (newDetectionSourceSortingPointer < 0)
{
newDetectionSourceSortingPointer = 0;
}
detectedTag.DetectionSources.Insert(newDetectionSourceSortingPointer, newDetectionSource);
}
public static Tag NotifyDetection(byte[] uid, Type baseTagType, DetectionSource newDetectionSource)
{
if (!baseTagType.IsSubclassOf(typeof(Tag)) && (baseTagType != typeof(Tag)))
{
throw new ArgumentException("Not a type of tag");
}
//Search for corresponding tag
Tag tag = null;
try
{
tag = DetectedTags.First(detectedTag => detectedTag.UID.SequenceEqual(uid));
//TODO: Integrate multi-type tags
//if (!(tag.GetType().IsSubclassOf(baseTagType)) && (!baseTagType.Equals(tag)))
//{
// DetectedTags.
//}
}
catch (InvalidOperationException)
{
//If it is the first time it is detected,...
//...search for tag types that were already searched,...
Type[] correpondingTagTypes = null;
try { correpondingTagTypes = AvailableTagTypes[baseTagType]; }
//...if not present, do search.
catch (KeyNotFoundException)
{ correpondingTagTypes = UpdateAvailableTagTypes(baseTagType); }
//TODO: Not Resilient enough, it do not search for newly introduced types
//Search for tag type that can initialize (UID correspond)
//TODO: Place Subclass first to be initiated first
foreach (Type correspondingTagType in correpondingTagTypes)
{
try
{
tag = (Tag)Activator.CreateInstance(correspondingTagType, uid);
//TODO: Do not break, create multitypetag if found several corresponding type, equals in derived branch
break;
}
catch (Exception) { }
}
if (tag == null)
{
throw new NotImplementedException("Tag type that support UID not found");
}
DetectedTags.Add(tag);
}
//Delete old detection source from the same antenna
try
{
DetectionSource previousDetectionSource = tag.DetectionSources.First(detectionSource => detectionSource.Antenna == newDetectionSource.Antenna);
if (previousDetectionSource.Time < newDetectionSource.Time) //Check time order
{
tag.DetectionSources.Remove(previousDetectionSource);
AddAndSortDetectionSource(ref tag, newDetectionSource);
}
//Else ignore the current detection as it is anterior of the already present one
}
catch (InvalidOperationException)
{
AddAndSortDetectionSource(ref tag, newDetectionSource);
}
//Update original antenna port with detected tag
newDetectionSource.Antenna.ConnectedTags.Add(tag);
return(tag);
}
