|
public static CreateAndMap ( |
||
| context | ||
| type | ||
| element | JToken | |
| typeMappings | IEnumerable |
|
| nestingLevel | int | |
| return | object | |
// 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);
}
