getDependency<T extends Object> method

Option<Result<Dependency<T>>> getDependency<T extends Object>({ Entity groupEntity = const DefaultEntity(), bool traverse = true, @Deprecated('Cycle detection is internal; this parameter is now ignored.') Set<DI>? visited, })

Retrieves the underlying Dependency object from the registry. Iterative DFS — see isRegistered.

Implementation

Option<Result<Dependency<T>>> getDependency<T extends Object>({
  Entity groupEntity = const DefaultEntity(),
  bool traverse = true,
  @Deprecated('Cycle detection is internal; this parameter is now ignored.')
  Set<DI>? visited,
}) {
  final seen = <DI>{};
  final stack = <(DI, Entity)>[
    (this as DI, groupEntity.preferOverDefault(focusGroup)),
  ];
  while (stack.isNotEmpty) {
    final (di, g) = stack.removeLast();
    if (!seen.add(di)) continue;
    final option = di.registry.getDependency<T>(groupEntity: g);
    if (option case Some()) {
      return option.map((e) => Ok(e).transf<Dependency<T>>());
    }
    if (!traverse) break;
    final parentList = di.parents.toList(growable: false);
    for (var i = parentList.length - 1; i >= 0; i--) {
      final parent = parentList[i];
      stack.add((parent, g.preferOverDefault(parent.focusGroup)));
    }
  }
  return const None();
}