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()));
}
