internal static bool IsClientInstantiatableType(Type t, JavaScriptSerializer serializer) { if (((t == null) || t.IsAbstract) || (t.IsInterface || t.IsArray)) { return(false); } if (t == typeof(object)) { return(false); } JavaScriptConverter converter = null; if (!serializer.ConverterExistsForType(t, out converter)) { if (t.IsValueType) { return(true); } if (t.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, s_emptyTypeArray, null) == null) { return(false); } } return(true); }
// Is this a type for which we want to instantiate based on the client stub internal static bool IsClientInstantiatableType(Type t, JavaScriptSerializer serializer) { // Abstract classes and interfaces can't be instantiated // if (t == null || t.IsAbstract || t.IsInterface || t.IsArray) { return(false); } // Even though 'object' is instantiatable, it is never useful to do this if (t == typeof(object)) { return(false); } // Return true if a converter is registered for the given type, so the converter // can generate code on the client to instantiate it. JavaScriptConverter converter = null; if (serializer.ConverterExistsForType(t, out converter)) { return(true); } // Value types are okay (i.e. structs); if (t.IsValueType) { return(true); } // Ignore types that don't have a public default ctor ConstructorInfo constructorInfo = t.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, s_emptyTypeArray, null); if (constructorInfo == null) { return(false); } return(true); }
private static bool ConvertDictionaryToObject(IDictionary <string, object> dictionary, Type type, JavaScriptSerializer serializer, bool throwOnError, out object convertedObject) { object obj2; Type t = type; string id = null; object o = dictionary; if (dictionary.TryGetValue("__type", out obj2)) { if (!ConvertObjectToTypeMain(obj2, typeof(string), serializer, throwOnError, out obj2)) { convertedObject = false; return(false); } id = (string)obj2; if (id != null) { if (serializer.TypeResolver != null) { t = serializer.TypeResolver.ResolveType(id); if (t == null) { if (throwOnError) { throw new InvalidOperationException(); } convertedObject = null; return(false); } } dictionary.Remove("__type"); } } JavaScriptConverter converter = null; if ((t != null) && serializer.ConverterExistsForType(t, out converter)) { try { convertedObject = converter.Deserialize(dictionary, t, serializer); return(true); } catch { if (throwOnError) { throw; } convertedObject = null; return(false); } } if ((id != null) || IsClientInstantiatableType(t, serializer)) { o = Activator.CreateInstance(t); } List <string> list = new List <string>(dictionary.Keys); if (IsGenericDictionary(type)) { Type type3 = type.GetGenericArguments()[0]; if ((type3 != typeof(string)) && (type3 != typeof(object))) { if (throwOnError) { throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, AtlasWeb.JSON_DictionaryTypeNotSupported, new object[] { type.FullName })); } convertedObject = null; return(false); } Type type4 = type.GetGenericArguments()[1]; IDictionary dictionary2 = null; if (IsClientInstantiatableType(type, serializer)) { dictionary2 = (IDictionary)Activator.CreateInstance(type); } else { dictionary2 = (IDictionary)Activator.CreateInstance(_dictionaryGenericType.MakeGenericType(new Type[] { type3, type4 })); } if (dictionary2 != null) { foreach (string str2 in list) { object obj4; if (!ConvertObjectToTypeMain(dictionary[str2], type4, serializer, throwOnError, out obj4)) { convertedObject = null; return(false); } dictionary2[str2] = obj4; } convertedObject = dictionary2; return(true); } } if ((type != null) && !type.IsAssignableFrom(o.GetType())) { if (!throwOnError) { convertedObject = null; return(false); } if (type.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, s_emptyTypeArray, null) == null) { throw new MissingMethodException(string.Format(CultureInfo.InvariantCulture, AtlasWeb.JSON_NoConstructor, new object[] { type.FullName })); } throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, AtlasWeb.JSON_DeserializerTypeMismatch, new object[] { type.FullName })); } foreach (string str3 in list) { object propertyValue = dictionary[str3]; if (!AssignToPropertyOrField(propertyValue, o, str3, serializer, throwOnError)) { convertedObject = null; return(false); } } convertedObject = o; return(true); }
// Method that converts an IDictionary<string, object> to an object of the right type private static bool ConvertDictionaryToObject(IDictionary <string, object> dictionary, Type type, JavaScriptSerializer serializer, bool throwOnError, out object convertedObject) { // The target type to instantiate. Type targetType = type; object s; string serverTypeName = null; object o = dictionary; // Check if __serverType exists in the dictionary, use it as the type. if (dictionary.TryGetValue(JavaScriptSerializer.ServerTypeFieldName, out s)) { // Convert the __serverType value to a string. if (!ConvertObjectToTypeMain(s, typeof(String), serializer, throwOnError, out s)) { convertedObject = false; return(false); } serverTypeName = (string)s; if (serverTypeName != null) { // If we don't have the JavaScriptTypeResolver, we can't use it if (serializer.TypeResolver != null) { // Get the actual type from the resolver. targetType = serializer.TypeResolver.ResolveType(serverTypeName); // In theory, we should always find the type. If not, it may be some kind of attack. if (targetType == null) { if (throwOnError) { throw new InvalidOperationException(); } convertedObject = null; return(false); } } // Remove the serverType from the dictionary, even if the resolver was null dictionary.Remove(JavaScriptSerializer.ServerTypeFieldName); } } JavaScriptConverter converter = null; if (targetType != null && serializer.ConverterExistsForType(targetType, out converter)) { try { convertedObject = converter.Deserialize(dictionary, targetType, serializer); return(true); } catch { if (throwOnError) { throw; } convertedObject = null; return(false); } } // Instantiate the type if it's coming from the __serverType argument. if (serverTypeName != null || IsClientInstantiatableType(targetType, serializer)) { // First instantiate the object based on the type. o = Activator.CreateInstance(targetType); } #if INDIGO StructuralContract contract = null; if (suggestedType != null && suggestedType.GetCustomAttributes(typeof(DataContractAttribute), false).Length > 0) { contract = StructuralContract.Create(suggestedType); } #endif // Use a different collection to avoid modifying the original during keys enumeration. List <String> memberNames = new List <String>(dictionary.Keys); // Try to handle the IDictionary<K, V> case if (IsGenericDictionary(type)) { Type keyType = type.GetGenericArguments()[0]; if (keyType != typeof(string) && keyType != typeof(object)) { if (throwOnError) { throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, AtlasWeb.JSON_DictionaryTypeNotSupported, type.FullName)); } convertedObject = null; return(false); } Type valueType = type.GetGenericArguments()[1]; IDictionary dict = null; if (IsClientInstantiatableType(type, serializer)) { dict = (IDictionary)Activator.CreateInstance(type); } else { // Get the strongly typed Dictionary<K, V> Type t = _dictionaryGenericType.MakeGenericType(keyType, valueType); dict = (IDictionary)Activator.CreateInstance(t); } if (dict != null) { foreach (string memberName in memberNames) { object memberObject; if (!ConvertObjectToTypeMain(dictionary[memberName], valueType, serializer, throwOnError, out memberObject)) { convertedObject = null; return(false); } dict[memberName] = memberObject; } convertedObject = dict; return(true); } } // Fail if we know we cannot possibly return the required type. if (type != null && !type.IsAssignableFrom(o.GetType())) { if (!throwOnError) { convertedObject = null; return(false); } ConstructorInfo constructorInfo = type.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, s_emptyTypeArray, null); if (constructorInfo == null) { throw new MissingMethodException(String.Format(CultureInfo.InvariantCulture, AtlasWeb.JSON_NoConstructor, type.FullName)); } throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, AtlasWeb.JSON_DeserializerTypeMismatch, type.FullName)); } foreach (string memberName in memberNames) { object propertyValue = dictionary[memberName]; #if INDIGO if (contract != null) { Member member = contract.FindMember(memberName); // if (member == null) { throw new InvalidOperationException(); } if (member.MemberType == MemberTypes.Field) { member.SetValue(o, propertyValue); } else { member.SetValue(o, propertyValue); } continue; } #endif // Assign the value into a property or field of the object if (!AssignToPropertyOrField(propertyValue, o, memberName, serializer, throwOnError)) { convertedObject = null; return(false); } } convertedObject = o; return(true); }