FilterQueryResult <T>?CombineFilterResult <T>(FilterQueryResult <T>?one, FilterQueryResult <T> two)
where T : Entity
{
if (one == null)
{
return(two);
}
if (two == null)
{
return(one);
}
return(new FilterQueryResult <T>(
a => one !.InDatabaseExpresson.Evaluate(a) && two.InDatabaseExpresson.Evaluate(a),
a => one !.InMemoryFunction !(a) && two !.InMemoryFunction !(a)));
}
internal FilterQueryResult <T> OnFilterQuery <T>()
where T : Entity
{
AssertAllowed(typeof(T), inUserInterface: false);
EntityEvents <T> ee = (EntityEvents <T>)entityEvents.TryGetC(typeof(T));
if (ee == null)
{
return(null);
}
FilterQueryResult <T> result = null;
foreach (var item in ee.OnFilterQuery())
{
result = CombineFilterResult(result, item);
}
return(result);
}
FilterQueryResult <T> CombineFilterResult <T>(FilterQueryResult <T> result, FilterQueryResult <T> expression)
where T : Entity
{
if (result == null)
{
return(expression);
}
if (expression == null)
{
return(result);
}
if (result.InMemoryFunction == null || expression.InMemoryFunction == null)
{
return(new FilterQueryResult <T>(a => result.InDatabaseExpresson.Evaluate(a) && expression.InDatabaseExpresson.Evaluate(a), null));
}
return(new FilterQueryResult <T>(
a => result.InDatabaseExpresson.Evaluate(a) && expression.InDatabaseExpresson.Evaluate(a),
a => result.InMemoryFunction(a) && expression.InMemoryFunction(a)));
}