public List <Tuple <LambdaExpression, SortOrder> > ParseOrderBy(Type thisType, string odataExpression)
{
var expressions = new List <Tuple <LambdaExpression, SortOrder> >();
var parser = CreateParser(odataExpression);
var tree = (CommonTree)parser.parse().Tree;
foreach (var node in tree.Children)
{
if (node.Type != PomonaQueryParser.ORDERBY_ASC)
{
throw new InvalidOperationException("Unexpected node in parser tree.");
}
var tempTree = PomonaQueryTreeParser.ParseTree(node.GetChild(0), 0, odataExpression);
var sortOrder = node.ChildCount > 1 &&
string.Equals(node.GetChild(1).Text,
"desc",
StringComparison.InvariantCultureIgnoreCase)
? SortOrder.Descending
: SortOrder.Ascending;
expressions.Add(
new Tuple <LambdaExpression, SortOrder>(TransformTreeNodeToExpression(thisType,
odataExpression,
tempTree), sortOrder));
}
return(expressions);
}
private static NodeBase ParseSymbolTree(string odataExpression)
{
if (odataExpression == null)
{
throw new ArgumentNullException(nameof(odataExpression));
}
var parser = CreateParser(odataExpression);
var parseReturn = parser.parse();
var tree = (CommonTree)parseReturn.Tree;
var tempTree = PomonaQueryTreeParser.ParseTree(tree, 0, odataExpression);
return(tempTree);
}