/// <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 WeakReference <object> TryGetEntity(
ValueBuffer valueBuffer,
bool throwOnNullKey,
out bool hasNullKey)
{
var key = PrincipalKeyValueFactory.CreateFromBuffer(valueBuffer);
if (key == null)
{
if (throwOnNullKey)
{
if (Key.IsPrimaryKey())
{
throw new InvalidOperationException(
CoreStrings.InvalidKeyValue(
Key.DeclaringEntityType.DisplayName(),
PrincipalKeyValueFactory.FindNullPropertyInValueBuffer(valueBuffer).Name));
}
throw new InvalidOperationException(
CoreStrings.InvalidAlternateKeyValue(
Key.DeclaringEntityType.DisplayName(),
PrincipalKeyValueFactory.FindNullPropertyInValueBuffer(valueBuffer).Name));
}
hasNullKey = true;
return(null);
}
hasNullKey = false;
return(_identityMap.TryGetValue((TKey)key, out var entity) ? entity : 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(ValueBuffer valueBuffer, bool throwOnNullKey)
{
var key = PrincipalKeyValueFactory.CreateFromBuffer(valueBuffer);
if (key == null &&
throwOnNullKey)
{
if (Key.IsPrimaryKey())
{
throw new InvalidOperationException(
CoreStrings.InvalidKeyValue(
Key.DeclaringEntityType.DisplayName(),
PrincipalKeyValueFactory.FindNullPropertyInValueBuffer(valueBuffer).Name));
}
throw new InvalidOperationException(
CoreStrings.InvalidAlternateKeyValue(
Key.DeclaringEntityType.DisplayName(),
PrincipalKeyValueFactory.FindNullPropertyInValueBuffer(valueBuffer).Name));
}
try
{
return(key != null &&
_identityMap.TryGetValue((TKey)key, out var entry)
? entry
: null);
}
catch (InvalidCastException e)
{
throw new InvalidOperationException(
// ReSharper disable once PossibleNullReferenceException
CoreStrings.ErrorMaterializingPropertyInvalidCast(
Key.DeclaringEntityType.DisplayName(),
Key.Properties.First().Name,
typeof(TKey),
key.GetType()),
e);
}
}
