protected internal Task <string> GenerateDocumentKeyForStorageAsync(object entity)
{
if (entity is IDynamicMetaObjectProvider)
{
string id;
if (GenerateEntityIdOnTheClient.TryGetIdFromDynamic(entity, out id))
{
return(CompletedTask.With(id));
}
else
{
return(GenerateKeyAsync(entity)
.ContinueWith(task =>
{
// If we generated a new id, store it back into the Id field so the client has access to to it
if (task.Result != null)
{
GenerateEntityIdOnTheClient.TrySetIdOnDynamic(entity, task.Result);
}
return task.Result;
}));
}
}
return(GetOrGenerateDocumentKeyAsync(entity)
.ContinueWith(task =>
{
GenerateEntityIdOnTheClient.TrySetIdentity(entity, task.Result);
return task.Result;
}));
}
private DocumentMetadata GetDocumentMetadata <T>(T instance)
{
DocumentMetadata value;
if (entitiesAndMetadata.TryGetValue(instance, out value) == false)
{
string id;
if (GenerateEntityIdOnTheClient.TryGetIdFromInstance(instance, out id) ||
(instance is IDynamicMetaObjectProvider &&
GenerateEntityIdOnTheClient.TryGetIdFromDynamic(instance, out id))
)
{
AssertNoNonUniqueInstance(instance, id);
var jsonDocument = GetJsonDocument(id);
entitiesByKey[id] = instance;
entitiesAndMetadata[instance] = value = new DocumentMetadata
{
ETag = UseOptimisticConcurrency ? (Guid?)Guid.Empty : null,
Key = id,
OriginalMetadata = jsonDocument.Metadata,
Metadata = (RavenJObject)jsonDocument.Metadata.CloneToken(),
OriginalValue = new RavenJObject()
};
}
else
{
throw new InvalidOperationException("Could not find the document key for " + instance);
}
}
return(value);
}