/// <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 ExpandToken NormalizePaths(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.PathToNavigationProp.Accept(pathReverser);
// we also need to call the select token normalizer for this level to reverse the select paths
SelectToken newSelectToken = term.SelectOption;
if (term.SelectOption != null)
{
newSelectToken = SelectTreeNormalizer.NormalizeSelectTree(term.SelectOption);
}
ExpandToken subExpandTree;
if (term.ExpandOption != null)
{
subExpandTree = this.NormalizePaths(term.ExpandOption);
}
else
{
subExpandTree = null;
}
ExpandTermToken newTerm = new ExpandTermToken(reversedPath, term.FilterOption, term.OrderByOptions, term.TopOption, term.SkipOption, term.CountQueryOption, term.LevelsOption, term.SearchOption, newSelectToken, subExpandTree, term.ComputeOption);
updatedTerms.Add(newTerm);
}
return(new ExpandToken(updatedTerms));
}
/// <summary>
/// Add semantic meaning to a Select or Expand Token
/// </summary>
/// <param name="odataPathInfo">The path info from Uri path.</param>
/// <param name="expandToken">the syntactically parsed expand token</param>
/// <param name="selectToken">the syntactically parsed select token</param>
/// <param name="configuration">The configuration to use for parsing.</param>
/// <param name="state">The state of binding.</param>
/// <returns>A select expand clause bound to metadata.</returns>
public static SelectExpandClause Bind(
ODataPathInfo odataPathInfo,
ExpandToken expandToken,
SelectToken selectToken,
ODataUriParserConfiguration configuration,
BindingState state)
{
ExpandToken normalizedExpand = ExpandTreeNormalizer.NormalizeExpandTree(expandToken);
SelectToken normalizedSelect = SelectTreeNormalizer.NormalizeSelectTree(selectToken);
SelectExpandBinder selectExpandBinder = new SelectExpandBinder(configuration, odataPathInfo, state);
SelectExpandClause clause = selectExpandBinder.Bind(normalizedExpand, normalizedSelect);
SelectExpandClauseFinisher.AddExplicitNavPropLinksWhereNecessary(clause);
new ExpandDepthAndCountValidator(configuration.Settings.MaximumExpansionDepth, configuration.Settings.MaximumExpansionCount).Validate(clause);
return(clause);
}
/// <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 NormalizePaths(ExpandToken treeToInvert)
{
if (treeToInvert != null)
{
// iterate through each expand term token, and reverse the tree in its path property
foreach (ExpandTermToken term in treeToInvert.ExpandTerms)
{
term.PathToProperty = term.PathToProperty.Reverse();
if (term.SelectOption != null)
{
term.SelectOption = SelectTreeNormalizer.NormalizeSelectTree(term.SelectOption);
}
if (term.ExpandOption != null)
{
term.ExpandOption = NormalizePaths(term.ExpandOption);
}
}
}
return(treeToInvert);
}
