/// <summary>
/// Initializes a new instance of the <see cref="EntityLoadInfo"/> struct.
/// </summary>
/// <param name="valueBuffer"> The row of data that represents this entity. </param>
/// <param name="materializer"> The method to materialize the data into an entity instance. </param>
public EntityLoadInfo(
ValueBuffer valueBuffer, [NotNull] Func<ValueBuffer, object> materializer)
{
// hot path
Debug.Assert(materializer != null);
ValueBuffer = valueBuffer;
_materializer = materializer;
}
public object CreateEntity(ValueBuffer valueBuffer)
{
DbContext context = (DbContext) valueBuffer[valueBuffer.Count - 1];
if (_proxyBuilder == null)
{
_proxyBuilder = context.GetInfrastructure().GetService<IProxyBuilder>();
}
return _proxyBuilder.ConstructProxy(this, valueBuffer, context);
}
public override InternalEntityEntry StartTrackingFromQuery(IEntityType entityType, object entity, ValueBuffer valueBuffer)
{
InTracking = true;
try
{
return base.StartTrackingFromQuery(entityType, entity, valueBuffer);
}
finally
{
InTracking = false;
}
}
public void StartTracking_is_no_op_if_entity_is_already_tracked()
{
var model = BuildModel();
var categoryType = model.FindEntityType(typeof(Category));
var stateManager = CreateStateManager(model);
var category = new Category { Id = 77, PrincipalId = 777 };
var valueBuffer = new ValueBuffer(new object[] { 77, "Bjork", 777 });
var entry = stateManager.StartTrackingFromQuery(categoryType, category, valueBuffer);
Assert.Same(entry, stateManager.StartTrackingFromQuery(categoryType, category, valueBuffer));
}
private static InternalEntityEntry NewInternalEntityEntry(
IStateManager stateManager,
IEntityType entityType,
object entity,
ValueBuffer valueBuffer)
{
if (!entityType.HasClrType())
{
return new InternalShadowEntityEntry(stateManager, entityType, valueBuffer);
}
return entityType.ShadowPropertyCount() > 0
? (InternalEntityEntry)new InternalMixedEntityEntry(stateManager, entityType, entity, valueBuffer)
: new InternalClrEntityEntry(stateManager, entityType, entity);
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public virtual void StartTracking(
[NotNull] IStateManager stateManager, [NotNull] object entity, ValueBuffer valueBuffer)
{
Check.NotNull(stateManager, nameof(stateManager));
Check.NotNull(entity, nameof(entity));
stateManager.StartTrackingFromQuery(_entityType, entity, valueBuffer);
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public void StartTracking([NotNull] IStateManager stateManager, ValueBuffer valueBuffer)
{
Check.NotNull(stateManager, nameof(stateManager));
stateManager.StartTrackingFromQuery(
EntityType,
Entity,
valueBuffer);
}
private bool Equals(ValueBuffer other)
=> Equals(_values, other._values)
&& _offset == other._offset;
public virtual void PropagateResults(ValueBuffer valueBuffer)
{
Check.NotNull(valueBuffer, nameof(valueBuffer));
// Note that this call sets the value into a sidecar and will only commit to the actual entity
// if SaveChanges is successful.
var index = 0;
foreach (var modification in ColumnModifications.Where(o => o.IsRead))
{
modification.Value = valueBuffer[index++];
}
}
public MaterializationContext(ValueBuffer valueBuffer)
{
ValueBuffer = valueBuffer;
Context = null;
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public virtual InternalEntityEntry TryGetEntry(IKey key, ValueBuffer valueBuffer, bool throwOnNullKey)
=> GetOrCreateIdentityMap(key).TryGetEntry(valueBuffer, throwOnNullKey);
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public virtual InternalEntityEntry StartTrackingFromQuery(
IEntityType baseEntityType,
object entity,
ValueBuffer valueBuffer)
{
var existingEntry = TryGetEntry(entity);
if (existingEntry != null)
{
return existingEntry;
}
var clrType = entity.GetType();
var newEntry = _factory.Create(this,
baseEntityType.ClrType == clrType
? baseEntityType
: _model.FindEntityType(clrType),
entity, valueBuffer);
foreach (var key in baseEntityType.GetKeys())
{
GetOrCreateIdentityMap(key).AddOrUpdate(newEntry);
}
_entityReferenceMap[entity] = newEntry;
newEntry.MarkUnchangedFromQuery();
if (_subscriber.SnapshotAndSubscribe(newEntry))
{
_needsUnsubscribe = true;
}
return newEntry;
}
/// <summary> /// This API supports the Entity Framework Core infrastructure and is not intended to be used /// directly from your code. This API may change or be removed in future releases. /// </summary> public virtual bool ShouldInclude(ValueBuffer valueBuffer) => false;
private bool Equals(ValueBuffer other) => Equals(_values, other._values) && _offset == other._offset;
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public virtual InternalEntityEntry Create(IStateManager stateManager, IEntityType entityType, object entity, ValueBuffer valueBuffer)
=> NewInternalEntityEntry(stateManager, entityType, entity, valueBuffer);
