public static bool ParseSingleEntityLink(this ODataController oDataController, Uri link, out IEdmEntitySet entitySet, out object key)
{
Contract.Requires <ArgumentNullException>(oDataController != null);
Contract.Requires <ArgumentNullException>(link != null);
HttpRequestMessage request = oDataController.Request;
// Get the route that was used for this request.
IHttpRoute route = request.GetRouteData().Route;
// Create an equivalent self-hosted route.
IHttpRoute newRoute = new HttpRoute(route.RouteTemplate,
new HttpRouteValueDictionary(route.Defaults),
new HttpRouteValueDictionary(route.Constraints),
new HttpRouteValueDictionary(route.DataTokens), route.Handler);
// Create a fake GET request for the link URI.
var tmpRequest = new HttpRequestMessage(HttpMethod.Get, link);
// Send this request through the routing process.
var routeData = newRoute.GetRouteData(request.GetRequestContext().VirtualPathRoot, tmpRequest);
// If the GET request matches the route, use the path segments to find the key.
if (routeData != null)
{
ODataPath path = tmpRequest.ODataProperties().Path;
if (path.PathTemplate == "~/entityset/key")
{
entitySet = path.EntitySet;
var keySegment = path.Segments.OfType <KeyValuePathSegment>().FirstOrDefault();
if (keySegment != null)
{
// Convert the segment into the key type.
key = ODataUriUtils.ConvertFromUriLiteral(keySegment.Value, ODataVersion.V3, request.ODataProperties().Model, entitySet.GetSingleKeyType());
return(true);
}
}
}
entitySet = null;
key = null;
return(false);
}