public void PartialSelectionReturnsNullAtCompileIfEmpty()
{
IPartialSelection <UserEntity, UserDto> selection = DummyQuery <UserEntity>()
.PartialSelect <UserDto>();
Expression <Func <UserEntity, UserDto> > expression = selection.Compile();
Assert.That(expression, Is.Null);
}
/// <inheritdoc />
public virtual FlowQuerySelection <TDestination> Select <TDestination>
(
IPartialSelection <TSource, TDestination> combiner
)
{
if (combiner == null)
{
throw new ArgumentNullException("combiner");
}
if (combiner.Count == 0)
{
throw new ArgumentException("No projection is made in ExpressionCombiner'2", "combiner");
}
Expression <Func <TSource, TDestination> > expression = combiner.Compile();
return(Select(expression));
}
/// <inheritdoc />
public virtual void Select <TDestination>
(
IResultStream <TDestination> stream,
IPartialSelection <TSource, TDestination> combiner
)
{
if (combiner == null)
{
throw new ArgumentNullException("combiner");
}
if (combiner.Count == 0)
{
throw new ArgumentException("No projection is made in ExpressionCombiner'2", "combiner");
}
Expression <Func <TSource, TDestination> > expression = combiner.Compile();
Select(stream, expression);
}
