private static Expression HandleLast(
EntityQueryModelVisitor entityQueryModelVisitor,
ChoiceResultOperatorBase choiceResultOperator)
{
if (entityQueryModelVisitor.Expression is MethodCallExpression methodCallExpression &&
methodCallExpression.Method
.MethodIsClosedFormOf(entityQueryModelVisitor.LinqOperatorProvider.Select))
{
// Push Last down below Select
return
(methodCallExpression.Update(
methodCallExpression.Object,
new[]
{
Expression.Call(
entityQueryModelVisitor.LinqOperatorProvider.ToSequence
.MakeGenericMethod(methodCallExpression.Arguments[0].Type.GetSequenceType()),
CallWithPossibleCancellationToken(
(choiceResultOperator.ReturnDefaultWhenEmpty
? entityQueryModelVisitor.LinqOperatorProvider.LastOrDefault
: entityQueryModelVisitor.LinqOperatorProvider.Last)
.MakeGenericMethod(methodCallExpression.Arguments[0].Type.GetSequenceType()),
methodCallExpression.Arguments[0])),
methodCallExpression.Arguments[1]
}));
}
return(CallWithPossibleCancellationToken(
(choiceResultOperator.ReturnDefaultWhenEmpty
? entityQueryModelVisitor.LinqOperatorProvider.LastOrDefault
: entityQueryModelVisitor.LinqOperatorProvider.Last)
.MakeGenericMethod(entityQueryModelVisitor.Expression.Type.GetSequenceType()),
entityQueryModelVisitor.Expression));
}
private static Expression HandleSingle(
EntityQueryModelVisitor entityQueryModelVisitor, ChoiceResultOperatorBase choiceResultOperator)
=> CallWithPossibleCancellationToken(
(choiceResultOperator.ReturnDefaultWhenEmpty
? entityQueryModelVisitor.LinqOperatorProvider.SingleOrDefault
: entityQueryModelVisitor.LinqOperatorProvider.Single)
.MakeGenericMethod(entityQueryModelVisitor.Expression.Type.GetSequenceType()),
entityQueryModelVisitor.Expression);
private static Expression HandleLast(
EntityQueryModelVisitor entityQueryModelVisitor, ChoiceResultOperatorBase choiceResultOperator)
=> CallWithPossibleCancellationToken(
(choiceResultOperator.ReturnDefaultWhenEmpty
? entityQueryModelVisitor.LinqOperatorProvider.LastOrDefault
: entityQueryModelVisitor.LinqOperatorProvider.Last)
.MakeGenericMethod(entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType),
entityQueryModelVisitor.Expression);
private static Expression HandleLast(
EntityQueryModelVisitor entityQueryModelVisitor, ChoiceResultOperatorBase choiceResultOperator)
{
return(Expression.Call(
(choiceResultOperator.ReturnDefaultWhenEmpty
? _lastOrDefault
: _last).MakeGenericMethod(entityQueryModelVisitor.StreamedSequenceInfo.ResultItemType),
entityQueryModelVisitor.Expression));
}