public virtual IQueryable <TSourceData> ApplyOrdering(IQueryable <TSourceData> source, Query request)
{
if (request.Orderings == null)
{
return(source);
}
bool orderingPerformed = false;
foreach (var ordering in request.Orderings)
{
if (ordering.Value == Ordering.Neutral)
{
continue;
}
var srcOrderingExpr = _configuration.GetOrderingExpression(ordering.Key);
if (srcOrderingExpr == null)
{
continue;
}
if (ordering.Value == Ordering.Ascending)
{
if (!orderingPerformed)
{
source = ReflectionCache.CallOrderBy(source, srcOrderingExpr, srcOrderingExpr.Body.Type);
orderingPerformed = true;
}
else
{
source = ReflectionCache.CallThenBy(source, srcOrderingExpr, srcOrderingExpr.Body.Type);
}
}
if (ordering.Value == Ordering.Descending)
{
if (!orderingPerformed)
{
source = ReflectionCache.CallOrderByDescending(source, srcOrderingExpr,
srcOrderingExpr.Body.Type);
orderingPerformed = true;
}
else
{
source = ReflectionCache.CallThenByDescending(source, srcOrderingExpr,
srcOrderingExpr.Body.Type);
}
}
}
if (!orderingPerformed && _configuration.FallbackOrdering != null)
{
source = ReflectionCache.CallOrderByDescending(source, _configuration.FallbackOrdering, _configuration.FallbackOrdering.Body.Type);
}
return(source);
}
