private static SelectorLambdaOperatorDescriptor CreatePagingSelector(SortCollectionDescriptor sortDescriptor, Type modelType)
=> GetSelector
(
modelType.GetIQueryableTypeString(),
sortDescriptor,
new ParameterOperatorDescriptor {
ParameterName = queryParameterName
}
);
public static SelectorLambdaOperatorDescriptor CreatePagingSelector(SortCollectionDescriptor sortDescriptor, Type modelType, SearchFilterGroupDescriptor filterGroupDescriptor, string searchText)
=> string.IsNullOrEmpty(searchText)
? CreatePagingSelector(sortDescriptor, modelType)
: GetSelector
(
modelType.GetIQueryableTypeString(),
sortDescriptor,
CreateWhereBody(filterGroupDescriptor, searchText)
);
private static OperatorDescriptorBase CreateSortBody(SortCollectionDescriptor sortCollectionDescriptor, OperatorDescriptorBase sourceOperand)
{
if (sortCollectionDescriptor?.SortDescriptions?.Any() != true)
{
throw new ArgumentException($"{nameof(sortCollectionDescriptor.SortDescriptions)}: C55F5642-5811-4840-B643-E38BDE7DA16E");
}
return(sortCollectionDescriptor.SortDescriptions.Aggregate
(
sourceOperand,
(OperatorDescriptorBase descriptor, SortDescriptionDescriptor next) =>
{
return object.ReferenceEquals(descriptor, sourceOperand)
? new OrderByOperatorDescriptor
{
SortDirection = next.SortDirection,
SourceOperand = descriptor,
SelectorBody = new MemberSelectorOperatorDescriptor
{
SourceOperand = new ParameterOperatorDescriptor {
ParameterName = selectorParameterName
},
MemberFullName = next.PropertyName
},
SelectorParameterName = selectorParameterName
}
: new ThenByOperatorDescriptor
{
SortDirection = next.SortDirection,
SourceOperand = descriptor,
SelectorBody = new MemberSelectorOperatorDescriptor
{
SourceOperand = new ParameterOperatorDescriptor {
ParameterName = selectorParameterName
},
MemberFullName = next.PropertyName
},
SelectorParameterName = selectorParameterName
};
}
));
}
public SelectorLambdaOperatorDescriptor CreatePagingSelector(SortCollectionDescriptor sortDescriptor, Type modelType, SearchFilterGroupDescriptor filterGroupDescriptor, string searchText) => CreatePagingSelectorHelper.CreatePagingSelector(sortDescriptor, modelType, filterGroupDescriptor, searchText);
private static SelectorLambdaOperatorDescriptor GetSelector(string queryableType, SortCollectionDescriptor sortDescriptor, OperatorDescriptorBase sourceOperand)
=> new SelectorLambdaOperatorDescriptor
{
Selector = CreatePagingDescriptor
(
sortDescriptor,
CreateSortBody
(
sortDescriptor,
sourceOperand
)
),
ParameterName = queryParameterName,
BodyType = queryableType,
SourceElementType = queryableType
};
private static OperatorDescriptorBase GetTakeOperator(this OperatorDescriptorBase pagingDescriptor, SortCollectionDescriptor sortCollectionDescriptor)
=> sortCollectionDescriptor.Take.HasValue
? new TakeOperatorDescriptor
{
SourceOperand = pagingDescriptor,
Count = sortCollectionDescriptor.Take.Value
}
: pagingDescriptor;
private static OperatorDescriptorBase CreatePagingDescriptor(SortCollectionDescriptor sortCollectionDescriptor, OperatorDescriptorBase sortBody) => sortBody.GetSkipOperator(sortCollectionDescriptor).GetTakeOperator(sortCollectionDescriptor);
