createInstanceWithBestConstructor method

O? createInstanceWithBestConstructor(Map<String, Object?> map, { FieldNameResolver? fieldNameResolver, FieldValueResolver? fieldValueResolver, })

Creates an instance with the constructor returned by getBestConstructorForMap, using map entries as parameters.

Implementation

O? createInstanceWithBestConstructor(Map<String, Object?> map,
    {FieldNameResolver? fieldNameResolver,
    FieldValueResolver? fieldValueResolver}) {
  var constructors = getBestConstructorsForMap(map,
      fieldNameResolver: fieldNameResolver,
      fieldValueResolver: fieldValueResolver,
      allowEmptyConstructors: map.isEmpty);

  if (constructors.isEmpty) return null;

  var invocationErrors = <List>[];

  void catchInvokeError(
      ConstructorReflection constructor,
      MethodInvocation methodInvocation,
      Map<String, dynamic> map,
      Object? error) {
    invocationErrors.add([constructor, methodInvocation, map, error]);
  }

  for (var c in constructors) {
    var o = createInstanceWithConstructor(c, map,
        fieldNameResolver: fieldNameResolver,
        fieldValueResolver: fieldValueResolver,
        onInvocationError: catchInvokeError);
    if (o != null) return o;
  }

  if (invocationErrors.isNotEmpty) {
    for (var i = 0; i < invocationErrors.length; ++i) {
      var args = invocationErrors[i];
      _showInvokeError(i, args[0], args[1], args[2], args[3]);
    }

    var error = invocationErrors.first[3];
    throw error;
  }

  return null;
}