private static ChangeTrackingEntry <T> mapToChangeTrackingEntry <T>(DbDataReader reader, IEntityType entityType) where T : class, new()
{
var entity = new T();
var entry = new ChangeTrackingEntry <T>(entity);
entry.ChangeContext = reader[nameof(ChangeTrackingEntry <T> .ChangeContext)] as string;
entry.ChangeVersion = (long)reader[nameof(ChangeTrackingEntry <T> .ChangeVersion)];
entry.CreationVersion = reader[nameof(ChangeTrackingEntry <T> .CreationVersion)] as long?;
var operation = (string)reader[nameof(ChangeTrackingEntry <T> .ChangeOperation)];
entry.ChangeOperation = operation switch
{
"I" => ChangeOperation.Insert,
"U" => ChangeOperation.Update,
"D" => ChangeOperation.Delete,
_ => throw new Exception()
};
foreach (var propertyInfo in typeof(T).GetProperties(BindingFlags.Instance | BindingFlags.Public))
{
var columnName = entityType.GetProperties().First(p => p.Name == propertyInfo.Name).GetColumnName();
object?readerValue = reader[columnName];
readerValue = readerValue == DBNull.Value ? null : readerValue;
propertyInfo.SetValue(entity, readerValue);
}
return(entry);
}
/// <inheritdoc />
public IChangeTrackingEntry EnsureEntry(object target, bool autoAttach)
{
var key = CalculateKey(target);
if (_entryDict.TryGetValue(key, out var entry))
{
return(entry);
}
var snapshot = _snapshotFactory.CreateSnapshot(target);
entry = new ChangeTrackingEntry(key, this, snapshot, autoAttach ? TrackedState.Unchanged : TrackedState.Detached);
if (autoAttach)
{
_entryDict.Add(key, entry);
}
return(entry);
}
