fromJson static method

MediaAsset? fromJson(dynamic value)

Returns a new MediaAsset instance and imports its values from value if it's a Map, null otherwise.

Implementation

// ignore: prefer_constructors_over_static_methods
static MediaAsset? fromJson(dynamic value) {
  if (value is Map) {
    final json = value.cast<String, dynamic>();

    // Ensure that the map contains the required keys.
    // Note 1: the values aren't checked for validity beyond being non-null.
    // Note 2: this code is stripped in release mode!
    assert(() {
      assert(json.containsKey(r'w'), 'Required key "MediaAsset[w]" is missing from JSON.');
      assert(json[r'w'] != null, 'Required key "MediaAsset[w]" has a null value in JSON.');
      assert(json.containsKey(r'h'), 'Required key "MediaAsset[h]" is missing from JSON.');
      assert(json[r'h'] != null, 'Required key "MediaAsset[h]" has a null value in JSON.');
      assert(json.containsKey(r'src'), 'Required key "MediaAsset[src]" is missing from JSON.');
      assert(json[r'src'] != null, 'Required key "MediaAsset[src]" has a null value in JSON.');
      return true;
    }());

    return MediaAsset(
      w: mapValueOfType<int>(json, r'w')!,
      h: mapValueOfType<int>(json, r'h')!,
      src: mapValueOfType<String>(json, r'src')!,
    );
  }
  return null;
}