DFS method

Operator DFS({ String? key, required Map<String, dynamic> json, })

Implementation

Operator DFS({String? key, required Map<String, dynamic> json}) {
  for (MapEntry<String, dynamic> entry in json.entries) {
    final operator = getOperator(entry.key);
    if (operator is CombinationOperator) {
      List<Operator> subList = [];
      entry.value.forEach((e) {
        subList.add(DFS(key: key, json: e));
      });
      operator.operators = subList;
      return operator;
    } else if (operator == null) {
      List<Operator> subList = [];
      entry.value.forEach((operatorStr, arg) {
        final subOperator =
            getOperator(operatorStr, key: entry.key, expected: arg);
        if (subOperator is ConditionOperator) {
          subList.add(subOperator);
        } else if (subOperator is CombinationOperator) {
          subList.add(DFS(key: entry.key, json: {operatorStr: arg}));
        } else if (subOperator == null) {
          if (arg is Map<String, dynamic>) {
            subList.add(_nestedOperator(
                "${key != null ? "$key." : ""}${entry.key}.${operatorStr}",
                arg));
          } else {
            throw AdapterException(error: 'Invalid Selector Format');
          }
        }
      });
      if (subList.length > 1) {
        return AndOperator(operators: subList);
      } else {
        return subList.first;
      }
    } else {
      throw AdapterException(error: "Invalid Format of Selector");
    }
  }

  return this.value;
}