public virtual void PropertyChanged(StateEntry entry, IPropertyBase propertyBase)
{
Check.NotNull(entry, "entry");
Check.NotNull(propertyBase, "propertyBase");
var snapshot = entry.TryGetSidecar(Sidecar.WellKnownNames.RelationshipsSnapshot);
var property = propertyBase as IProperty;
if (property != null)
{
entry.SetPropertyModified(property);
if (snapshot != null)
{
DetectKeyChange(entry, property, snapshot);
}
}
else
{
var navigation = propertyBase as INavigation;
if (navigation != null &&
snapshot != null)
{
TrackAddedEntities(entry.StateManager, DetectNavigationChange(entry, navigation, snapshot));
}
}
}
public virtual void PropertyChanged([NotNull] StateEntry entry, [NotNull] IPropertyBase propertyBase)
{
Check.NotNull(entry, "entry");
Check.NotNull(propertyBase, "propertyBase");
var property = propertyBase as IProperty;
if (property != null)
{
entry.SetPropertyModified(property);
// Note: Make sure DetectPrincipalKeyChange is called even if DetectForeignKeyChange has returned true
var foreignKeyChange = DetectForeignKeyChange(entry, property);
var principalKeyChange = DetectPrincipalKeyChange(entry, property);
if (foreignKeyChange ||
principalKeyChange)
{
entry.RelationshipsSnapshot.TakeSnapshot(property);
}
}
else
{
var navigation = propertyBase as INavigation;
if (navigation != null)
{
if (DetectNavigationChange(entry, navigation))
{
entry.RelationshipsSnapshot.TakeSnapshot(navigation);
}
}
}
}
private void DetectPropertyChanges(StateEntry entry)
{
var entityType = entry.EntityType;
if (entityType.HasPropertyChangedNotifications())
{
return;
}
var snapshot = entry.TryGetSidecar(Sidecar.WellKnownNames.OriginalValues);
if (snapshot == null)
{
return;
}
foreach (var property in entityType.Properties)
{
if (property.OriginalValueIndex >= 0 &&
!Equals(entry[property], snapshot[property]))
{
entry.SetPropertyModified(property);
}
}
}
public virtual bool DetectChanges([NotNull] StateEntry entry)
{
Check.NotNull(entry, "entry");
var entityType = entry.EntityType;
var originalValues = entry.TryGetSidecar(Sidecar.WellKnownNames.OriginalValues);
// TODO: Consider more efficient/higher-level/abstract mechanism for checking if DetectChanges is needed
// See issue #731
if (entityType.Type == null ||
originalValues == null ||
typeof(INotifyPropertyChanged).GetTypeInfo().IsAssignableFrom(entityType.Type.GetTypeInfo()))
{
return(false);
}
var changedFkProperties = new List <IProperty>();
var foundChanges = false;
foreach (var property in entityType.Properties)
{
// TODO: Perf: don't lookup accessor twice
if (!Equals(entry[property], originalValues[property]))
{
entry.SetPropertyModified(property);
foundChanges = true;
}
if (DetectForeignKeyChange(entry, property))
{
changedFkProperties.Add(property);
}
}
foreach (var property in changedFkProperties)
{
entry.RelationshipsSnapshot.TakeSnapshot(property);
}
foreach (var navigation in entityType.Navigations)
{
if (DetectNavigationChange(entry, navigation))
{
entry.RelationshipsSnapshot.TakeSnapshot(navigation);
}
}
return(foundChanges);
}
