GeometryCollectionField.fromJson constructor

GeometryCollectionField.fromJson(Map<String, dynamic> json)

Parse the incoming json and return a GeometryCollectionField Usage, assuming that u parse a incoming json source, then the runtime type is a _InternalLinkedHashMap: GeometryCollectionField.fromJson(Map<String, dynamic>.from(elem'location'))

Implementation

factory GeometryCollectionField.fromJson(Map<String, dynamic> json) {
  /// Create a variable with the type of the Field, to reconstruct the incoming json data.
  String type = json['type'];

  /// Create a variable with a list of a list with coordinates.
  List<dynamic> geometries = [];

  /// A list of the [MultiPoint] fields inside the geometries
  List<MultiPointField> multiPoints = [];

  /// A list of the [MultiLineString] fields inside the geometries
  List<MultiLineStringField> multiLineStrings = [];

  /// A list of the [LineString] fields inside the geometries
  List<LineStringField> lineStrings = [];

  /// A list of the [MultiPolygon] fields inside the geometries
  List<MultiPolygonField> multiPolygons = [];

  /// A list of the [PointField] fields inside the geometries
  List<PointField> points = [];

  /// A list of the [PolygonField] fields inside the geometries
  List<PolygonField> polygons = [];

  /// Loop over the geometries and add them to the coordinates list.
  json['geometries'].forEach((elem) {
    switch(elem['type']) {
      case fieldMultiPoint:
        geometries.add(MultiPointField.fromJson(Map<String, dynamic>.from(elem)));
        multiPoints.add(MultiPointField.fromJson(Map<String, dynamic>.from(elem)));
        break;
      case fieldMultiLineString:
        geometries.add(MultiLineStringField.fromJson(Map<String, dynamic>.from(elem)));
        multiLineStrings.add(MultiLineStringField.fromJson(Map<String, dynamic>.from(elem)));
        break;
      case fieldLineString:
        geometries.add(LineStringField.fromJson(Map<String, dynamic>.from(elem)));
        lineStrings.add(LineStringField.fromJson(Map<String, dynamic>.from(elem)));
        break;
      case fieldMultiPolygon:
        geometries.add(MultiPolygonField.fromJson(Map<String, dynamic>.from(elem)));
        multiPolygons.add(MultiPolygonField.fromJson(Map<String, dynamic>.from(elem)));
        break;
      case fieldPointField:
        geometries.add(PointField.fromJson(Map<String, dynamic>.from(elem)));
        points.add(PointField.fromJson(Map<String, dynamic>.from(elem)));
        break;
      case fieldPolygonField:
        geometries.add(PolygonField.fromJson(Map<String, dynamic>.from(elem)));
        polygons.add(PolygonField.fromJson(Map<String, dynamic>.from(elem)));
        break;
    }
  });

  /// Return a [GeometryCollectionField] with the variables [type] and [coordinates]
  return GeometryCollectionField(
    type: type,
    geometries: geometries,
    multiPoints: multiPoints,
    multiLineStrings: multiLineStrings,
    lineStrings: lineStrings,
    multiPolygons: multiPolygons,
    points: points,
    polygons: polygons
  );
}