public IObjectGraphTrackingInfo GetTrackingGraphFromProperty(PropertyInfo property)
{
DeclaredObjectPropertyChangeTracking propertyTracking = null;
PropertyTrackings.TryGetValue(property.GetBaseProperty(), out propertyTracking);
List <IDeclaredObjectPropertyChangeTracking> hierarchy = new List <IDeclaredObjectPropertyChangeTracking>();
bool searchTracking = true;
while (searchTracking)
{
hierarchy.Add(propertyTracking);
var result = PropertyTrackings.SingleOrDefault
(
t => t.Value.CurrentValue == propertyTracking.TargetObject &&
t.Value.Property.PropertyType.GetProperty(propertyTracking.Property.Name) == propertyTracking.Property.GetBaseProperty()
);
if (result.Value != null)
{
propertyTracking = result.Value;
property = propertyTracking.Property;
}
else
{
searchTracking = false;
}
}
Contract.Assert(() => propertyTracking != null);
return(new ObjectGraphTrackingInfo
(
propertyTracking.TargetObject,
hierarchy.Reverse <IDeclaredObjectPropertyChangeTracking>().ToImmutableList()
));
}
/// <summary>
/// Adds or updates a tracked property state.
/// </summary>
/// <param name="property">The tracked property</param>
/// <param name="targetObject">The object owning the tracked property</param>
public void AddOrUpdateTracking(PropertyInfo property, object targetObject = null)
{
Contract.Requires(property != null, "Since this is tracking a property, the property itself cannot be null");
Contract.Requires(targetObject == null || property.DeclaringType.IsAssignableFrom(targetObject.GetType()), "Given property must be declared on the given target object");
lock (_syncLock)
{
targetObject = targetObject ?? TargetObject;
object currentValue = targetObject.GetType().GetProperty(property.Name, DefaultBindingFlags)
.GetValue(targetObject);
DeclaredObjectPropertyChangeTracking existingTracking = null;
Contract.Assert(PropertyTrackings != null, "Cannot add or update a tracking if tracking collection is null");
PropertyInfo baseProperty = property.GetBaseProperty();
DeclaredObjectPropertyChangeTracking tracking = null;
if (Configuration.CanTrackProperty(property) && !PropertyTrackings.TryGetValue(baseProperty, out existingTracking))
{
DeclaredObjectPropertyChangeTracking declaredTracking = new DeclaredObjectPropertyChangeTracking(Configuration, TrackableObjectFactory, this, targetObject, baseProperty, property, currentValue);
tracking = declaredTracking;
PropertyTrackings.Add(baseProperty, declaredTracking);
}
else if (existingTracking != null)
{
existingTracking.CurrentValue = currentValue;
tracking = existingTracking;
}
if (tracking != null && tracking.HasChanged)
{
_Changed?.Invoke(this, new DeclaredObjectPropertyChangeEventArgs(targetObject, tracking));
}
}
}