internal void Initialize(bool addToWorld = true)
{
created = true;
// Make sure traits are usable for condition notifiers
foreach (var t in TraitsImplementing <INotifyCreated>())
{
t.Created(this);
}
var allObserverNotifiers = new HashSet <VariableObserverNotifier>();
foreach (var provider in TraitsImplementing <IObservesVariables>())
{
foreach (var variableUser in provider.GetVariableObservers())
{
allObserverNotifiers.Add(variableUser.Notifier);
foreach (var variable in variableUser.Variables)
{
var cs = conditionStates.GetOrAdd(variable);
cs.Notifiers.Add(variableUser.Notifier);
// Initialize conditions that have not yet been granted to 0
// NOTE: Some conditions may have already been granted by INotifyCreated calling GrantCondition,
// and we choose to assign the token count to safely cover both cases instead of adding an if branch.
conditionCache[variable] = cs.Tokens.Count;
}
}
}
// Update all traits with their initial condition state
foreach (var notify in allObserverNotifiers)
{
notify(this, readOnlyConditionCache);
}
// TODO: Some traits may need initialization after being notified of initial condition state.
// TODO: A post condition initialization notification phase may allow queueing activities instead.
// The initial activity should run before any activities queued by INotifyCreated.Created
// However, we need to know which traits are enabled (via conditions), so wait for after the calls and insert the activity as the first
ICreationActivity creationActivity = null;
foreach (var ica in TraitsImplementing <ICreationActivity>())
{
if (!ica.IsTraitEnabled())
{
continue;
}
if (creationActivity != null)
{
throw new InvalidOperationException("More than one enabled ICreationActivity trait: {0} and {1}".F(creationActivity.GetType().Name, ica.GetType().Name));
}
var activity = ica.GetCreationActivity();
if (activity == null)
{
continue;
}
creationActivity = ica;
activity.Queue(CurrentActivity);
CurrentActivity = activity;
}
if (addToWorld)
{
World.Add(this);
}
}