public virtual Expression BindNavigation(INavigation navigation, bool clientEval)
{
if (!EntityType.IsAssignableFrom(navigation.DeclaringEntityType) &&
!navigation.DeclaringEntityType.IsAssignableFrom(EntityType))
{
throw new InvalidOperationException(
$"Called EntityProjectionExpression.GetNavigation() with incorrect INavigation. EntityType:{EntityType.DisplayName()}, Navigation:{navigation.Name}");
}
if (!_navigationExpressionsCache.TryGetValue(navigation, out var expression))
{
if (navigation.IsCollection())
{
expression = new ObjectArrayProjectionExpression(navigation, AccessExpression);
}
else
{
expression = new EntityProjectionExpression(
navigation.GetTargetType(),
new ObjectAccessExpression(navigation, AccessExpression));
}
_navigationExpressionsCache[navigation] = expression;
}
if (!clientEval &&
expression.Name.Length == 0)
{
// Non-persisted navigation can't be translated
return(null);
}
return((Expression)expression);
}
public ObjectArrayProjectionExpression(
INavigation navigation, Expression accessExpression, EntityProjectionExpression innerProjection = null)
{
var targetType = navigation.GetTargetType();
Type = typeof(IEnumerable <>).MakeGenericType(targetType.ClrType);
Name = targetType.GetContainingPropertyName();
if (Name == null)
{
throw new InvalidOperationException(
$"Navigation '{navigation.DeclaringEntityType.DisplayName()}.{navigation.Name}' doesn't point to an embedded entity.");
}
Navigation = navigation;
AccessExpression = accessExpression;
InnerProjection = innerProjection ?? new EntityProjectionExpression(
targetType,
new RootReferenceExpression(targetType, ""));
}
public virtual ObjectArrayProjectionExpression Update(Expression accessExpression, EntityProjectionExpression innerProjection)
=> accessExpression != AccessExpression || innerProjection != InnerProjection
? new ObjectArrayProjectionExpression(Navigation, accessExpression, innerProjection)
: this;
/// <summary> /// This is an internal API that supports the Entity Framework Core infrastructure and not subject to /// the same compatibility standards as public APIs. It may be changed or removed without notice in /// any release. You should only use it directly in your code with extreme caution and knowing that /// doing so can result in application failures when updating to a new Entity Framework Core release. /// </summary> protected abstract Expression VisitEntityProjection(EntityProjectionExpression entityProjectionExpression);
public SelectExpression(IEntityType entityType)
{
Container = "c";// entityType.GetContainer();
FromExpression = new RootReferenceExpression(entityType, RootAlias);
_projectionMapping[new ProjectionMember()] = new EntityProjectionExpression(entityType, FromExpression);
}
/// <summary> /// This is an internal API that supports the Entity Framework Core infrastructure and not subject to /// the same compatibility standards as public APIs. It may be changed or removed without notice in /// any release. You should only use it directly in your code with extreme caution and knowing that /// doing so can result in application failures when updating to a new Entity Framework Core release. /// </summary> public virtual int AddToProjection(EntityProjectionExpression entityProjection) => AddToProjection(entityProjection, null);
protected override Expression VisitEntityProjection(EntityProjectionExpression entityProjectionExpression)
{
throw new NotImplementedException();
}
