operator [] method

Implementation

@override
ConstraintData? operator [](int index) {
  if (index < 0 || index >= length) {
    throw RangeError.index(index, this, 'index');
  }
  final buffer = SpineBindings.bindings.spine_array_constraint_data_buffer(nativePtr.cast());
  if (buffer[index].address == 0) return null;
  final rtti = SpineBindings.bindings.spine_constraint_data_get_rtti(buffer[index]);
  final className = SpineBindings.bindings.spine_rtti_get_class_name(rtti).cast<Utf8>().toDartString();
  switch (className) {
    case 'IkConstraintData':
      final castedPtr = SpineBindings.bindings.spine_constraint_data_cast_to_ik_constraint_data(buffer[index]);
      return IkConstraintData.fromPointer(castedPtr);
    case 'PathConstraintData':
      final castedPtr = SpineBindings.bindings.spine_constraint_data_cast_to_path_constraint_data(buffer[index]);
      return PathConstraintData.fromPointer(castedPtr);
    case 'PhysicsConstraintData':
      final castedPtr = SpineBindings.bindings.spine_constraint_data_cast_to_physics_constraint_data(buffer[index]);
      return PhysicsConstraintData.fromPointer(castedPtr);
    case 'SliderData':
      final castedPtr = SpineBindings.bindings.spine_constraint_data_cast_to_slider_data(buffer[index]);
      return SliderData.fromPointer(castedPtr);
    case 'TransformConstraintData':
      final castedPtr = SpineBindings.bindings.spine_constraint_data_cast_to_transform_constraint_data(buffer[index]);
      return TransformConstraintData.fromPointer(castedPtr);
    default:
      throw UnsupportedError('Unknown concrete type: $className for abstract class ConstraintData');
  }
}