/// <summary>
/// Normalize a SelectToken into something that can be used to trim an expand tree.
/// </summary>
/// <param name="treeToNormalize">The select token to normalize</param>
/// <returns>Normalized SelectToken</returns>
public static SelectToken NormalizeSelectTree(SelectToken treeToNormalize)
{
PathReverser pathReverser = new PathReverser();
List <PathSegmentToken> invertedPaths = (from property in treeToNormalize.Properties
select property.Accept(pathReverser)).ToList();
// to normalize a select token we just need to invert its paths, so that
// we match the ordering on an ExpandToken.
return(new SelectToken(invertedPaths));
}
/// <summary>
/// Invert the all of the paths in an expandToken, such that they are now in the same order as they are present in the
/// base url
/// </summary>
/// <param name="treeToInvert">the tree to invert paths on</param>
/// <returns>a new tree with all of its paths inverted</returns>
public static ExpandToken InvertPaths(ExpandToken treeToInvert)
{
// iterate through each expand term token, and reverse the tree in its path property
List <ExpandTermToken> updatedTerms = new List <ExpandTermToken>();
foreach (ExpandTermToken term in treeToInvert.ExpandTerms)
{
PathReverser pathReverser = new PathReverser();
PathSegmentToken reversedPath = term.PathToNavProp.Accept(pathReverser);
ExpandTermToken newTerm = new ExpandTermToken(reversedPath, term.FilterOption, term.OrderByOption, term.TopOption, term.SkipOption, term.InlineCountOption, term.SelectOption, term.ExpandOption);
updatedTerms.Add(newTerm);
}
return(new ExpandToken(updatedTerms));
}