internal static IStorable LoadObject(Type objType, string idStr, Database db, SerializationContext context = null)
{
IStorable storable = null, parent;
Document doc;
Guid id;
id = DocumentsSerializer.IDFromString(idStr);
if (context == null)
{
context = new SerializationContext(db, objType);
context.ContractResolver = new StorablesStackContractResolver(context, null);
context.RootID = id;
}
if (context.Cache.IsCached(id))
{
return(context.Cache.ResolveReference(id));
}
doc = db.GetExistingDocument(idStr);
if (doc != null)
{
Type realType = context.Binder.BindToType(doc.Properties [OBJ_TYPE] as string);
if (realType == null)
{
/* Should never happen */
Log.Error("Error getting type " + doc.Properties [OBJ_TYPE] as string);
realType = objType;
}
else if (!objType.IsAssignableFrom(realType))
{
Log.Error("Types mismatch " + objType.FullName + " vs " + realType.FullName);
return(null);
}
storable = DeserializeObject(doc, realType, context) as IStorable;
if (storable != null)
{
storable.DocumentID = idStr;
if (context.Stack.Count != 0)
{
parent = context.Stack.Peek();
parent.SavedChildren.Add(storable);
storable.ParentID = parent.ID;
}
else
{
storable.ParentID = ParentIDFromString(idStr);
}
}
}
return(storable);
}
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);
}