/// <summary>
/// Adds an object to be tracked by this objecttype.
/// </summary>
/// <param name="existingObject">Object to track.</param>
/// <param name="assumeNew">If false, ignores objects not ready to be saved (with id=-1).
/// Else assign a new ID if the object has not been saved yet.</param>
/// <returns>True on success. False if somehow the add failed.</returns>
public virtual bool Add(ISaveable existingObject, bool assumeNew = true)
{
int id = existingObject.GetSaveID();
if (assumeNew && id == -1)
{
// SetSaveID is only called by two things: Loading, and this method. By locking here, this should be threadsafe.
lock (this)
{
id = existingObject.GetSaveID();
if (id == -1)
{
id = NextFreeNumber(); //Note that this may get a lock on ItemDictionary also, and then the file stream.
existingObject.SetSaveID(id);
existingObject.Save();
}
}
}
if (id >= 0)
{
Add(existingObject, id, false);
return(true);
}
return(false);
}
public override string GetValue(IModifiable source)
{
ISaveable value = Getter(source);
if (value == null)
{
return("null");
}
else
{
return(value.GetType().Name + " " + value.GetSaveID());
}
}
/// <summary>
/// Attempts to remove an object from this type.
/// </summary>
/// <param name="saveable"></param>
/// <returns></returns>
public virtual bool Remove(ISaveable saveable)
{
int id = saveable.GetSaveID();
if (id == -1)
{
return(false);
}
bool success;
lock (ItemDictionary)
{
success = (ItemDictionary.Count > id && ItemDictionary[id] == saveable);
if (success)
{
ItemDictionary[id] = null;
ReturnIndex(id);
}
}
return(success);
}
public bool Contains(ISaveable obj)
{
return(Contains(obj.GetSaveID()));
}