CreateAndMap() публичный статический Метод

public static CreateAndMap ( DeserializationContext context, Type type, JToken element, IEnumerable typeMappings, int nestingLevel ) : object
context DeserializationContext
type System.Type
element JToken
typeMappings IEnumerable
nestingLevel int
Результат object
Пример #1
0
// ReSharper disable UnusedParameter.Local
        IEnumerable <TResult> ParseInSingleColumnMode(DeserializationContext context, JToken root, string[] columnNames, TypeMapping[] jsonTypeMappings)
// ReSharper restore UnusedParameter.Local
        {
            if (columnNames.Count() != 1)
            {
                throw new InvalidOperationException("The deserializer is running in single column mode, but the response included multiple columns which indicates a projection instead. If using the fluent Cypher interface, use the overload of Return that takes a lambda or object instead of single string. (The overload with a single string is for an identity, not raw query text: we can't map the columns back out if you just supply raw query text.)");
            }

            var resultType = typeof(TResult);
            var isResultTypeANodeOrRelationshipInstance = resultType.IsGenericType &&
                                                          (resultType.GetGenericTypeDefinition() == typeof(Node <>) ||
                                                           resultType.GetGenericTypeDefinition() == typeof(RelationshipInstance <>));
            var mapping = jsonTypeMappings.SingleOrDefault(m => m.ShouldTriggerForPropertyType(0, resultType));
            var newType = mapping == null ? resultType : mapping.DetermineTypeToParseJsonIntoBasedOnPropertyType(resultType);

            var dataArray = (JArray)root["data"];
            var rows      = dataArray.Children();
            var results   = rows.Select(row =>
            {
                if (!(row is JArray))
                {
                    throw new InvalidOperationException("Expected the row to be a JSON array of values, but it wasn't.");
                }

                var rowAsArray = (JArray)row;
                if (rowAsArray.Count != 1)
                {
                    throw new InvalidOperationException(string.Format("Expected the row to only have a single array value, but it had {0}.", rowAsArray.Count));
                }

                var elementToParse = row[0];
                if (elementToParse is JObject)
                {
                    var propertyNames = ((JObject)elementToParse)
                                        .Properties()
                                        .Select(p => p.Name)
                                        .ToArray();
                    var dataElementLooksLikeANodeOrRelationshipInstance =
                        new[] { "data", "self", "traverse", "properties" }.All(propertyNames.Contains);
                    if (!isResultTypeANodeOrRelationshipInstance &&
                        dataElementLooksLikeANodeOrRelationshipInstance)
                    {
                        elementToParse = elementToParse["data"];
                    }
                }

                var parsed = CommonDeserializerMethods.CreateAndMap(context, newType, elementToParse, jsonTypeMappings, 0);
                return((TResult)(mapping == null ? parsed : mapping.MutationCallback(parsed)));
            });

            return(results);
        }
        // ReSharper disable UnusedParameter.Local
        private IEnumerable <TResult> ParseInSingleColumnMode(DeserializationContext context, JToken root, string[] columnNames, TypeMapping[] jsonTypeMappings, bool isHttp)
        // ReSharper restore UnusedParameter.Local
        {
            if (columnNames.Count() != 1)
            {
                throw new InvalidOperationException("The deserializer is running in single column mode, but the response included multiple columns which indicates a projection instead. If using the fluent Cypher interface, use the overload of Return that takes a lambda or object instead of single string. (The overload with a single string is for an identity, not raw query text: we can't map the columns back out if you just supply raw query text.)");
            }

            var resultType = typeof(TResult);
            var isResultTypeANodeOrRelationshipInstance = resultType.GetTypeInfo().IsGenericType&&
                                                          (resultType.GetGenericTypeDefinition() == typeof(Node <>) ||
                                                           resultType.GetGenericTypeDefinition() == typeof(RelationshipInstance <>));
            var mapping = jsonTypeMappings.SingleOrDefault(m => m.ShouldTriggerForPropertyType(0, resultType));
            var newType = mapping == null ? resultType : mapping.DetermineTypeToParseJsonIntoBasedOnPropertyType(resultType);

            var dataArray = isHttp ? (JArray)root.SelectToken("$.results[0].data") : (JArray)root["data"];

            if (dataArray == null) //Hack prior to swapping out deserialization completely.
            {
                dataArray = !isHttp ? (JArray)root.SelectToken("$.results[0].data") : (JArray)root["data"];
            }
            var rows = dataArray.Children();

            //var x = resultFormat == CypherResultFormat.Rest ? "rest" : "row";
            var dataPropertyNameInTransaction = "row";
            var results = rows.Select(row =>
            {
                if (inTransaction || isHttp)
                //All HTTP messages are now in txs -- This is a temporary measure.
                {
                    var rowObject = row as JObject;
                    if (rowObject == null)
                    {
                        throw new InvalidOperationException("Expected the row to be a JSON object, but it wasn't.");
                    }

                    if (!rowObject.TryGetValue(dataPropertyNameInTransaction, out var rowProperty))
                    {
                        throw new InvalidOperationException("There is no row property in the JSON object.");
                    }

                    row = rowProperty;
                }

                if (!(row is JArray))
                {
                    // no transaction mode and the row is not an array
                    throw new InvalidOperationException("Expected the row to be a JSON array of values, but it wasn't.");
                }

                var rowAsArray = (JArray)row;
                if (rowAsArray.Count > 1)
                {
                    throw new InvalidOperationException($"Expected the row to only have a single array value, but it had {rowAsArray.Count}.");
                }

                return(rowAsArray);
            }
                                      )
                          .Where(row => row.Count != 0) // No elements to parse
                          .Select(row =>
            {
                var elementToParse = row[0];
                if (elementToParse is JObject)
                {
                    var propertyNames = ((JObject)elementToParse)
                                        .Properties()
                                        .Select(p => p.Name)
                                        .ToArray();
                    var dataElementLooksLikeANodeOrRelationshipInstance =
                        new[] { "data", "self", "traverse", "properties" }.All(propertyNames.Contains);
                    if (!isResultTypeANodeOrRelationshipInstance &&
                        dataElementLooksLikeANodeOrRelationshipInstance)
                    {
                        elementToParse = elementToParse["data"];
                    }
                }

                var parsed = CommonDeserializerMethods.CreateAndMap(context, newType, elementToParse, jsonTypeMappings, 0);
                return((TResult)(mapping == null ? parsed : mapping.MutationCallback(parsed)));
            });

            return(results);
        }