protected virtual IParsedLambda CreateParsedLambda()
{
//PERF: This ugly processing of nodes for both transformers in one loop is for performance. Perhaps move bach to older cleaner solution
var nullableNodeTransformer = new NullableNodeTransformer();
var boolNodeTransformer = new BoolNodeTransformer();
var newNodes = new NodesCollection();
var maxIndex = Nodes.Count;
for (var i = 0; i < Nodes.Count; i++)
{
var nullableNodes = nullableNodeTransformer.Transform(maxIndex, ref i, Nodes[i], Nodes);
var merged = nullableNodes.MergeWith(Nodes.Skip(i + 1)).ToArray();
var maxIndexInner = nullableNodes.Length;
for (var iInner = 0; iInner < maxIndexInner; iInner++)
{
var boolNodes = boolNodeTransformer.Transform(maxIndexInner, ref iInner, merged[iInner], new NodesCollection(merged));
newNodes.AddNodes(boolNodes);
}
}
return(new ParsedLambda(newNodes.ToArray()));
}
public virtual IParsedLambda Parse(OrderByExpression[] orderByExpressions)
{
Ensure.That(orderByExpressions, "orderByExpressions").HasItems();
var nodesContainer = new NodesCollection();
foreach (var orderByExpression in orderByExpressions.Where(e => e != null))
{
var memberExpression = orderByExpression.InnerLambdaExpression.Body.GetRightMostMember();
if (memberExpression == null)
{
throw new SisoDbException(ExceptionMessages.OrderByExpressionDoesNotTargetMember.Inject(orderByExpression.ToString()));
}
var callExpression = (orderByExpression.InnerLambdaExpression.Body is UnaryExpression)
? ((UnaryExpression)orderByExpression.InnerLambdaExpression.Body).Operand as MethodCallExpression
: orderByExpression.InnerLambdaExpression.Body as MethodCallExpression;
if (callExpression != null)
{
throw new SisoDbException(ExceptionMessages.OrderByParser_UnsupportedMethodForSortingDirection);
}
var memberType = memberExpression.Type;
if (memberType.IsEnumerableType())
{
memberType = memberType.GetEnumerableElementType();
}
var sortDirection = orderByExpression is OrderByAscExpression ? SortDirections.Asc : SortDirections.Desc;
var memberPath = memberExpression.ToPath();
var sortingNode = new SortingNode(memberPath, memberType, DataTypeConverter.Convert(memberType, memberPath), sortDirection);
nodesContainer.AddNode(sortingNode);
}
return(new ParsedLambda(nodesContainer.ToArray()));
}