unpopulated method

  1. @override
Feature<Geometry> unpopulated({
  1. int traverse = 0,
  2. bool onBounds = true,
})
override

Returns a feature object of the same subtype as this with certain data members unpopulated (or cleared).

If nothing is unpopulated then this is returned.

If onBounds is true (as by default):

  • The bounds in a returned feature object is ensured to be unpopulated (expect when bounds is always available).
  • If traverse > 0, then also bounding boxes of child feature or geometry objects of this feature object are unpopulated for child levels indicated by traverse (0: no childs, 1: only direct childs, 2: direct childs and childs of them, ..).

See also populated.

Implementation

@override
Feature unpopulated({
  int traverse = 0,
  bool onBounds = true,
}) {
  if (onBounds) {
    // unpopulate a geometry when traversing is asked
    final geom = traverse > 0
        ? geometry?.unpopulated(traverse: traverse - 1, onBounds: onBounds)
        : geometry;

    // create a new feature if geometry changed or bounds was populated
    if (geom != geometry || bounds != null) {
      return Feature(
        id: id,
        geometry: geom,
        properties: properties,
        custom: custom,
      );
    }
  }
  return this;
}