public IObservableGroup GetObservableGroup(IGroup group, params int[] collectionIds)
{
var requiredComponents = ComponentTypeLookup.GetComponentTypes(group.RequiredComponents);
var excludedComponents = ComponentTypeLookup.GetComponentTypes(group.ExcludedComponents);
var lookupGroup = new LookupGroup(requiredComponents, excludedComponents);
var observableGroupToken = new ObservableGroupToken(lookupGroup, collectionIds);
if (_observableGroups.Contains(observableGroupToken))
{
return(_observableGroups[observableGroupToken]);
}
var entityMatches = GetEntitiesFor(lookupGroup, collectionIds);
var configuration = new ObservableGroupConfiguration
{
ObservableGroupToken = observableGroupToken,
InitialEntities = entityMatches
};
if (collectionIds != null && collectionIds.Length > 0)
{
configuration.NotifyingCollections = _collections.Where(x => collectionIds.Contains(x.Id));
}
else
{
configuration.NotifyingCollections = new [] { this };
}
var observableGroup = ObservableGroupFactory.Create(configuration);
_observableGroups.Add(observableGroup);
return(_observableGroups[observableGroupToken]);
}
