isDeepValid static method

bool isDeepValid(Json json)

Deeply validate the given json.

json is considered valid iff it contains a primitive value (of type Null, bool, int, double, String) or a composite value (of type List<dynamic> or Map<String, dynamic>) whose elements (of the list) or values (of the map) satisfy the same constraints recursively.

Implementation

static bool isDeepValid(Json json) {
  var v = json.value;
  if (v == null || v is bool || v is num || v is String) {
    return true;
  }
  if (v is List<Json>) {
    for (Json json in v) {
      if (!isDeepValid(json)) return false;
    }
    return true;
  }
  if (v is Map<String, Json>) {
    for (Json json in v.values) {
      if (!isDeepValid(json)) return false;
    }
    return true;
  }
  // Some other type, can't be a Json.
  return false;
}