fromJson static method

FormLayout? fromJson(dynamic value)

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

Implementation

// ignore: prefer_constructors_over_static_methods
static FormLayout? fromJson(dynamic value) {
  if (value is FormLayout) {
    return 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(() {
      requiredKeys.forEach((key) {
        assert(json.containsKey(key), 'Required key "FormLayout[$key]" is missing from JSON.');
        assert(json[key] != null, 'Required key "FormLayout[$key]" has a null value in JSON.');
      });
      return true;
    }());

    return FormLayout(
      name: mapValueOfType<String>(json, r'name'),
      width: mapValueOfType<double>(json, r'width'),
      height: mapValueOfType<double>(json, r'height'),
      descr: mapValueOfType<String>(json, r'descr'),
      tag: Tag.fromJson(json[r'tag']),
      guid: mapValueOfType<String>(json, r'guid'),
      group: mapValueOfType<String>(json, r'group'),
      sections: FormSection.listFromJson(json[r'sections']) ?? const [],
      importedServiceXPaths: json[r'importedServiceXPaths'] is List ? (json[r'importedServiceXPaths'] as List).cast<String>() : const [],
    );
  }
  return null;
}