public override object ReadJson(JsonReader reader, Type objectType, object existingValue,
JsonSerializer serializer)
{
IStorable storable;
Guid id;
string idStr;
idStr = reader.Value as string;
if (idStr == null)
{
return(null);
}
id = DocumentsSerializer.IDFromString(idStr);
/* Check if it's a circular reference and the object is currently being deserialized. In this scenario
* the oject is not yet in the cache, but we have a reference of the object in the stack.
* eg: TimelineEvent.Project where the TimelineEvent is a children of Project and Project is in the stack
* as being deserialized */
storable = context.Stack.FirstOrDefault(e => e.ID == id);
if (storable == null)
{
/* Now check in the Cache and return the cached object instance instead a new one */
storable = context.Cache.ResolveReference(id);
}
/* If the object is being deserialized for the first retrieve from the DB document */
if (storable == null)
{
storable = DocumentsSerializer.LoadObject(objectType, idStr, context.DB, context) as IStorable;
if (storable == null)
{
throw new StorageException(
String.Format("Referenced object of type {0} with id: {1} was not found in the DB", objectType, id));
}
context.Cache.AddReference(storable);
}
return(storable);
}
public object Retrieve(Type type, Guid id)
{
return(DocumentsSerializer.LoadObject(type, id, db));
}