internal void EnsureUniqueNames(NetModel.NetModel model)
{
foreach (IGrouping <string, INetType> netTypes in model.NetTypes.GroupBy(c => c.Name))
{
if (netTypes.Count() == 1)
{
continue;
}
foreach (var netClass in netTypes.OfType <NetClass>().ToList())
{
foreach (var avroField in model.NetTypes.OfType <NetClass>().ToList()
.SelectMany(c => c.Fields)
.Where(f => (f.FieldType == netClass.Name ||
f.FieldType == netClass.Name + "[]" ||
f.FieldType == netClass.Name + "?") &&
f.Namespace == netClass.ClassNamespace))
{
avroField.FieldType = avroField.Namespace + avroField.FieldType;
}
netClass.Name = netClass.ClassNamespace + netClass.Name;
}
}
}
private void Resolve(object json, NetModel.NetModel model)
{
if (json is JObject parent)
{
foreach (var prop in parent)
{
if (prop.Key == "type" && prop.Value.ToString() == "record")
{
ResolveRecord(parent, model);
}
else if (prop.Key == "type" && prop.Value.ToString() == "enum")
{
_enumResolver.ResolveEnum(parent, model);
}
else if (prop.Value is JObject)
{
Resolve(prop.Value, model);
}
else if (prop.Value is JArray array)
{
foreach (var arrayItem in array)
{
switch (arrayItem)
{
case JObject jObject:
Resolve(jObject, model);
break;
case JValue _:
// This could be any item in an array - for example nullable
break;
default:
throw new InvalidAvroObjectException($"Unhandled newtonsoft type {arrayItem.GetType().Name}");
}
}
}
}
}
else if (json is JArray)
{
throw new InvalidAvroObjectException($"Unhandled array on root level");
}
else
{
throw new InvalidAvroObjectException($"Unidentified newtonsoft object type {json.GetType().Name}");
}
}
internal string FromAvroSchema(string schema)
{
Initialize();
JObject json = (JObject)JsonConvert.DeserializeObject(schema);
NetModel.NetModel model = new NetModel.NetModel();
Resolve(json, model);
_namespaceHelper.EnsureUniqueNames(model);
StringBuilder sb = new StringBuilder();
foreach (INetType ac in model.NetTypes)
{
ac.Write(sb);
}
return(sb.ToString());
}
private void ResolveRecord(JObject parent, NetModel.NetModel model)
{
var shortName = parent["name"].ToString().Split('.').Last();
NetClass c = new NetClass()
{
Name = shortName,
ClassNamespace = _namespaceHelper.ExtractNamespace(parent, parent["name"].ToString(), shortName)
};
model.NetTypes.Add(c);
// Get Fields
foreach (var field in parent["fields"] as JArray)
{
if (field is JObject fieldObject)
{
// Get Field type
NetClassField fieldType = new NetClassField();
bool isNullable = false;
switch (field["type"])
{
case JValue _:
fieldType = ResolveField(fieldObject);
break;
case JObject fieldJObject:
fieldType = ResolveField(fieldJObject);
break;
case JArray types:
{
if (types.Any(t => t.ToString() == "null"))
{
isNullable = true;
}
if (types.Count > 2)
{
throw new InvalidAvroObjectException(
$"Unable to determine acceptable data type for {field["type"]}");
}
// Is the field type an object that's defined in this spot
JToken arrayFieldType = types.FirstOrDefault(x => x.ToString() != "null");
switch (arrayFieldType)
{
case JValue _:
fieldObject["type"] = arrayFieldType;
fieldType = ResolveField(fieldObject);
break;
case JObject arrayFieldJObject:
fieldType = ResolveField(arrayFieldJObject);
break;
default:
throw new InvalidAvroObjectException($"Unable to create array in array {arrayFieldType}");
}
break;
}
default:
throw new InvalidAvroObjectException($"Unable to process field type of {field["type"].GetType().Name}");
}
if (isNullable)
{
fieldType.FieldType += "?";
}
fieldType.Name = field["name"].ToString();
if (field["default"] is JValue)
{
fieldType.Default = field["default"].ToString();
}
if (field["doc"] is JValue)
{
fieldType.Doc = field["doc"].ToString();
}
c.Fields.Add(fieldType);
}
else
{
throw new InvalidAvroObjectException($"Field type {field.GetType().Name} not supported");
}
}
}