json_article_7.dart

class SimpleObject {
  const SimpleObject({
    this.aString,
    this.anInt,
    this.aDouble,
    this.aListOfStrings,
    this.aListOfInts,
    this.aListOfDoubles,
  });

  final String aString;
  final int anInt;
  final double aDouble;
  final List<String> aListOfStrings;
  final List<int> aListOfInts;
  final List<double> aListOfDoubles;

  factory SimpleObject.fromJson(Map<String, dynamic> json) {
    if (json == null) {
      throw FormatException("Null JSON provided to SimpleObject");
    }
    
    return SimpleObject(
        aString: json['aString'],
        anInt: json['anInt'],
        aDouble: json['aDouble'],
        aListOfStrings: json['aListOfStrings'] != null
            ? List<String>.from(json['aListOfStrings'])
            : null,
        aListOfInts: json['aListOfInts'] != null
            ? List<int>.from(json['aListOfInts'])
            : null,
        aListOfDoubles: json['aListOfDoubles'] != null
            ? List<double>.from(json['aListOfDoubles'])
            : null,
    );
  }
}