public static IEnumerable <KeyValuePair <Expression, DocumentSortOrder> > CreateOrderExpression(Type type, InvocationQuerySyntaxNode node)
{
var visitor = new ExpressionOrderQuerySyntaxVisitor(type);
var orderProperties = (ConstantExpression)visitor.Visit(node);
return((IEnumerable <KeyValuePair <Expression, DocumentSortOrder> >)orderProperties.Value);
}
private IDictionary <Expression <Func <TDocument, object> >, DocumentSortOrder> BuildOrder(IHttpRequest request)
{
var orderMethods = ParseOrder(request);
if (orderMethods != null)
{
var order = new Dictionary <Expression <Func <TDocument, object> >, DocumentSortOrder>();
foreach (var orderMethod in orderMethods)
{
var orderProperties = ExpressionOrderQuerySyntaxVisitor.CreateOrderExpression(typeof(TDocument), orderMethod);
if (orderProperties != null)
{
foreach (var orderProperty in orderProperties)
{
order.Add((Expression <Func <TDocument, object> >)orderProperty.Key, orderProperty.Value);
}
}
}
return(order);
}
return(null);
}