fromJson static method

StructDataType fromJson(Map<String, dynamic> data)

Factory method: parse a JSON representation into a concrete DataType. Looks up the correct subclass in _dataTypes.

Implementation

static StructDataType fromJson(Map<String, dynamic> data) {
  if (data['type'] != 'struct') {
    throw Exception("Expected type 'struct', got '${data['type']}'");
  }
  final rawFields = data["fields"] as Map<String, dynamic>? ?? const {};
  return StructDataType(
    nullable: data["nullable"],
    metadata: data["metadata"],
    fields: rawFields.map((key, value) => MapEntry(key, DataType.fromJson(value as Map<String, dynamic>))),
  );
}