/// <summary>
/// Verify the rule
/// </summary>
/// <param name="context">Service context</param>
/// <param name="info">out paramater to return violation information when rule fail</param>
/// <returns>true if rule passes; false otherwise</returns>
public override bool?Verify(ServiceContext context, out ExtensionRuleViolationInfo info)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
bool?passed = null;
info = null;
var qs = HttpUtility.ParseQueryString(context.Destination.Query);
string qExpand = qs["$expand"];
if (!string.IsNullOrEmpty(qExpand))
{
var edmxHelper = new EdmxHelper(XElement.Parse(context.MetadataDocument));
EntityType et;
edmxHelper.TryGetItem(context.EntityTypeFullName, out et);
var branches = ResourcePathHelper.GetBranchedSegments(qExpand);
foreach (var paths in branches)
{
var navStack = ODataUriAnalyzer.GetNavigationStack(et, paths).ToArray();
bool[] targetIsCollection = (from n in navStack select n.RelationshipMultiplicity == RelationshipMultiplicity.Many).ToArray();
// to check each entity set resolved along the navigation path to have proper structure (json array, each item has proper properties)
TestResult result = null;
JObject jo = JObject.Parse(context.ResponsePayload);
var version = JsonParserHelper.GetPayloadODataVersion(jo);
for (int i = 0; i < paths.Length; i++)
{
string jSchema = null;
if (navStack[i].RelationshipMultiplicity == RelationshipMultiplicity.Many)
{
var etShort = navStack[i].GetEntityType().FullName.GetLastSegment();
string jsET = JsonSchemaHelper.GetSchemaForEntityType(etShort, context.MetadataDocument);
string jsCore = string.Format(@"""{0}"": {{""type"": ""array"", ""required"" : true, ""items"": {1} }}", paths[i], jsET);
jSchema = JsonSchemaHelper.GetJsonSchema(paths, i, version, jsCore, targetIsCollection);
passed = JsonParserHelper.ValidateJson(jSchema, context.ResponsePayload, out result);
if (!passed.Value)
{
break;
}
}
}
if (!passed.Value)
{
info = new ExtensionRuleViolationInfo(this.ErrorMessage, context.Destination, context.ResponsePayload, result != null ? result.LineNumberInError : -1);
break;
}
}
}
return(passed);
}