private static IList <IList <string> > ExtractPaths(Expression expression, INodeTypeProvider nodeTypeProvider, bool selectMode, bool includeProtocolProps, INamingScheme namingScheme)
{
var visitor = new PropertyPathExtractionVisitor(nodeTypeProvider, selectMode, includeProtocolProps, namingScheme);
visitor.VisitExpression(expression);
return(visitor._paths);
}
public override void VisitSelectClause(SelectClause selectClause, QueryModel queryModel)
{
var paths = PropertyPathExtractionVisitor.ExtractPaths(selectClause.Selector, _nodeTypeProvider, true, false, _namingScheme, "/");
if (paths.Count == 0)
{
Precedence = 0;
}
else if (!paths.SequenceEqual(new[] { "*" }))
{
Select = string.Join(",", paths.ToArray());
}
base.VisitSelectClause(selectClause, queryModel);
}
protected override void VisitOrderings(ObservableCollection <Ordering> orderings, QueryModel queryModel, OrderByClause orderByClause)
{
var orders = orderings.SelectMany(ordering => PropertyPathExtractionVisitor.ExtractPaths(ordering.Expression, _nodeTypeProvider, false, true, _namingScheme, ".")
.Select(path => string.Format("{0} {1}", path, ordering.OrderingDirection.ToString().ToLowerInvariant())))
.ToList();
if (orders.Count > 0)
{
if (OrderBy != null)
{
OrderBy = "," + OrderBy;
}
OrderBy = string.Join(",", orders.ToArray()) + OrderBy;
}
base.VisitOrderings(orderings, queryModel, orderByClause);
}
public override void VisitResultOperator(ResultOperatorBase resultOperator, QueryModel queryModel, int index)
{
if (resultOperator is AnyResultOperator ||
resultOperator is CountResultOperator ||
resultOperator is LongCountResultOperator ||
resultOperator is FirstResultOperator ||
resultOperator is SingleResultOperator)
{
return;
}
var takeOperator = resultOperator as TakeResultOperator;
if (takeOperator != null)
{
var count = takeOperator.GetConstantCount();
if (Count != null)
{
count = Math.Min(count, Count.Value);
}
Count = count;
return;
}
var skipOperator = resultOperator as SkipResultOperator;
if (skipOperator != null)
{
var startIndex = skipOperator.GetConstantCount();
if (Count != null)
{
Count = Math.Max(Count.Value - startIndex, 0);
}
StartIndex = (StartIndex ?? 1) + startIndex;
return;
}
var fetchOperator = resultOperator as FetchResultOperator;
if (fetchOperator != null)
{
var paths = PropertyPathExtractionVisitor.ExtractPaths(fetchOperator.Selector, _nodeTypeProvider, false, false, _namingScheme, "/");
if (paths.Count > 0)
{
if (Include != null)
{
Include += ",";
}
Include += string.Join(",", paths.ToArray());
}
return;
}
var withPrecedenceOperator = resultOperator as WithPrecedenceResultOperator;
if (withPrecedenceOperator != null)
{
Precedence = Math.Min(Precedence ?? int.MaxValue, withPrecedenceOperator.Precedence);
return;
}
var withExtensionArgOperator = resultOperator as WithExtensionArgResultOperator;
if (withExtensionArgOperator != null)
{
ExtensionArgs[withExtensionArgOperator.Name] = withExtensionArgOperator.Value;
return;
}
#if !NET_3_5
if (resultOperator is ToCollectionAsyncResultOperator)
{
return;
}
#endif
throw new NotSupportedException(string.Format("Result operator '{0}' not supported", resultOperator.GetType()));
}
