public override Property ReadJson(JsonReader reader, Type objectType, Property existingValue, bool hasExistingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
{
return(null);
}
IReferenceResolver resolver = serializer.Context.Context as IReferenceResolver;
Property target = null;
string id = string.Empty;
JObject json = JObject.Load(reader);
foreach (JProperty property in json.Properties())
{
if (property.Name == "$ref")
{
target = (Property)serializer.Deserialize(json.CreateReader());
}
else if (property.Name == "$id")
{
id = (string)property.Value;
}
else if (property.Name == "identity")
{
Guid identity = new Guid((string)property.Value);
IReferenceObjectFactory factory = MetadataPersistentContext.Current.Factory;
target = factory.New <Property>(identity);
resolver.AddReference(null, id, target);
}
}
return(target);
}
public static Entity Select(Guid identity)
{
Entity entity = null;
IPersistentContext context = MetadataPersistentContext.Current;
IReferenceObjectFactory factory = MetadataPersistentContext.Current.Factory;
using (SqlConnection connection = new SqlConnection(context.ConnectionString))
using (SqlCommand command = connection.CreateCommand())
{
connection.Open();
command.CommandType = CommandType.Text;
command.CommandText = SelectCommandText;
SqlParameter parameter = new SqlParameter("key", SqlDbType.UniqueIdentifier)
{
Direction = ParameterDirection.Input,
Value = identity
};
command.Parameters.Add(parameter);
using (SqlDataReader reader = command.ExecuteReader())
{
if (reader.Read())
{
entity = (Entity)context.Factory.New(typeof(Entity), identity);
// check if nothing was found in IdentityMap - in-memory cash
if (entity.State == PersistentState.New)
{
entity.State = PersistentState.Loading;
Guid guid;
entity._namespace = factory.New <Namespace>((Guid)reader[0]);
guid = (Guid)reader[1];
entity.owner = (guid == Guid.Empty) ? null : factory.New <Entity>(guid);
guid = (Guid)reader[2];
entity.parent = (guid == Guid.Empty) ? null : factory.New <Entity>(guid);
entity.name = (string)reader[3];
entity.code = (int)reader[4];
entity.version = (byte[])reader[5];
entity.alias = reader.GetString(6);
entity.isAbstract = reader.GetBoolean(7);
entity.isSealed = reader.GetBoolean(8);
entity.State = PersistentState.Original;
}
}
}
}
return(entity);
}
public DataMapper(string connectionString, IReferenceObjectFactory factory)
{
ConnectionString = connectionString;
Factory = factory;
}