private void DetectKeyChanges(StateEntry entry, Sidecar snapshot)
{
var entityType = entry.EntityType;
if (!entityType.HasPropertyChangedNotifications())
{
foreach (var property in entityType.Properties)
{
DetectKeyChange(entry, property, snapshot);
}
}
}
private void DetectNavigationChanges(StateEntry entry, Sidecar snapshot)
{
var entityType = entry.EntityType;
if (!entityType.HasPropertyChangedNotifications() ||
entityType.Navigations.Any(n => n.IsNonNotifyingCollection(entry)))
{
foreach (var navigation in entityType.Navigations)
{
TrackAddedEntities(entry.StateManager, DetectNavigationChange(entry, navigation, snapshot));
}
}
}
private async Task DetectNavigationChangesAsync(
StateEntry entry, Sidecar snapshot, CancellationToken cancellationToken = default(CancellationToken))
{
var entityType = entry.EntityType;
if (!entityType.HasPropertyChangedNotifications() ||
entityType.Navigations.Any(n => n.IsNonNotifyingCollection(entry)))
{
foreach (var navigation in entityType.Navigations)
{
await TrackAddedEntitiesAsync(entry.StateManager, DetectNavigationChange(entry, navigation, snapshot), cancellationToken)
.WithCurrentCulture();
}
}
}
public virtual Sidecar AddSidecar([NotNull] Sidecar sidecar)
{
Check.NotNull(sidecar, "sidecar");
var newArray = new[] { sidecar };
_sidecars = _sidecars == null
? newArray
: newArray.Concat(_sidecars).ToArray();
if (sidecar.TransparentRead ||
sidecar.TransparentWrite ||
sidecar.AutoCommit)
{
_stateData.TransparentSidecarInUse = true;
}
return(sidecar);
}
private void DetectKeyChange(StateEntry entry, IProperty property, Sidecar snapshot)
{
if (!snapshot.HasValue(property))
{
return;
}
// TODO: Perf: make it fast to check if a property is part of any key
var isPrimaryKey = property.IsPrimaryKey();
var isPrincipalKey = _model.Service.GetReferencingForeignKeys(property).Any();
var isForeignKey = property.IsForeignKey();
if (isPrimaryKey ||
isPrincipalKey ||
isForeignKey)
{
var snapshotValue = snapshot[property];
var currentValue = entry[property];
// Note that mutation of a byte[] key is not supported or detected, but two different instances
// of byte[] with the same content must be detected as equal.
if (!StructuralComparisons.StructuralEqualityComparer.Equals(currentValue, snapshotValue))
{
if (isForeignKey)
{
entry.StateManager.Notify.ForeignKeyPropertyChanged(entry, property, snapshotValue, currentValue);
}
if (isPrimaryKey)
{
entry.StateManager.UpdateIdentityMap(entry, snapshot.GetPrimaryKeyValue());
}
if (isPrincipalKey)
{
entry.StateManager.Notify.PrincipalKeyPropertyChanged(entry, property, snapshotValue, currentValue);
}
snapshot.TakeSnapshot(property);
}
}
}
private IEnumerable <object> DetectNavigationChange(StateEntry entry, INavigation navigation, Sidecar snapshot)
{
var snapshotValue = snapshot[navigation];
var currentValue = entry[navigation];
var stateManager = entry.StateManager;
var added = new HashSet <object>(ReferenceEqualityComparer.Instance);
if (navigation.IsCollection())
{
var snapshotCollection = (IEnumerable)snapshotValue;
var currentCollection = (IEnumerable)currentValue;
var removed = new HashSet <object>(ReferenceEqualityComparer.Instance);
if (snapshotCollection != null)
{
foreach (var entity in snapshotCollection)
{
removed.Add(entity);
}
}
if (currentCollection != null)
{
foreach (var entity in currentCollection)
{
if (!removed.Remove(entity))
{
added.Add(entity);
}
}
}
if (added.Any() ||
removed.Any())
{
stateManager.Notify.NavigationCollectionChanged(entry, navigation, added, removed);
snapshot.TakeSnapshot(navigation);
}
}
else if (!ReferenceEquals(currentValue, snapshotValue))
{
stateManager.Notify.NavigationReferenceChanged(entry, navigation, snapshotValue, currentValue);
if (currentValue != null)
{
added.Add(currentValue);
}
snapshot.TakeSnapshot(navigation);
}
return(added);
}
public override EntityKey Create(IEntityType entityType, IReadOnlyList <IProperty> properties, Sidecar sidecar)
{
Check.NotNull(entityType, "entityType");
Check.NotNull(properties, "properties");
Check.NotNull(sidecar, "sidecar");
return(Create(entityType, sidecar[properties[0]]));
}
public abstract EntityKey Create(
[NotNull] IEntityType entityType, [NotNull] IReadOnlyList <IProperty> properties, [NotNull] Sidecar sidecar);
public override EntityKey Create(IEntityType entityType, IReadOnlyList <IProperty> properties, Sidecar sidecar)
{
Check.NotNull(entityType, "entityType");
Check.NotNull(properties, "properties");
Check.NotNull(sidecar, "sidecar");
return(Create(entityType, properties.Select(p => sidecar[p]).ToArray()));
}