private void SerializeDiscriminatedValue(BsonSerializationContext context, BsonSerializationArgs args, object value, Type actualType)
{
var serializer = BsonSerializer.LookupSerializer(actualType);
var polymorphicSerializer = serializer as IBsonPolymorphicSerializer;
if (polymorphicSerializer != null && polymorphicSerializer.IsDiscriminatorCompatibleWithObjectSerializer)
{
serializer.Serialize(context, args, value);
}
else
{
if (context.IsDynamicType != null && context.IsDynamicType(value.GetType()))
{
args.NominalType = actualType;
serializer.Serialize(context, args, value);
}
else
{
var bsonWriter = context.Writer;
var discriminator = _discriminatorConvention.GetDiscriminator(typeof(object), actualType);
bsonWriter.WriteStartDocument();
bsonWriter.WriteName(_discriminatorConvention.ElementName);
BsonValueSerializer.Instance.Serialize(context, discriminator);
bsonWriter.WriteName("_v");
serializer.Serialize(context, value);
bsonWriter.WriteEndDocument();
}
}
}
public async Task <Snapshot> Load <TSnap>(
string invariantId,
string causationId
)
{
if (null != causationId)
{
if (await _events
.AsQueryable()
.Where(e => e.InvariantType == typeof(TSnap).Name)
.Where(e => e.InvariantId == invariantId)
.AnyAsync(e => e.CausationId == causationId))
{
throw new IdempotencyException(causationId);
}
}
var snapshot = await _snapshots.AsQueryable()
.Where(d => d.Snap is TSnap)
.Where(d => d.Identity == invariantId)
.FirstOrDefaultAsync();
return(snapshot ?? BsonSerializer.Deserialize <Snapshot>(new BsonDocument {
{ "Sequence", -1 },
{ "Identity", invariantId },
{ "Snap", new BsonDocument {
{ "_t", _discriminatorConvention.GetDiscriminator(typeof(object), typeof(TSnap)) }
} }
}));
}
public void Serialize(BsonWriter bsonWriter, Type nominalType, object value, IBsonSerializationOptions options)
{
if (value == null)
{
bsonWriter.WriteNull();
}
else
{
if (nominalType.IsGenericType && nominalType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
nominalType = nominalType.GetGenericArguments()[0];
}
this.VerifyNominalType(nominalType);
// Added
Type type = value == null ? nominalType : ProxyManager.GetUnderlyingType(value);
// Added
BsonClassMap bsonClassMap = BsonClassMap.LookupClassMap(type);
bsonWriter.WriteStartDocument();
DocumentSerializationOptions serializationOptions = options == null ? DocumentSerializationOptions.Defaults : (DocumentSerializationOptions)options;
BsonMemberMap memberMap = (BsonMemberMap)null;
if (serializationOptions.SerializeIdFirst)
{
memberMap = bsonClassMap.IdMemberMap;
if (memberMap != null)
{
this.SerializeMember(bsonWriter, value, memberMap);
}
}
if ((type != nominalType || bsonClassMap.DiscriminatorIsRequired || bsonClassMap.HasRootClass) && !bsonClassMap.IsAnonymous)
{
IDiscriminatorConvention discriminatorConvention = BsonDefaultSerializer.LookupDiscriminatorConvention(nominalType);
BsonValue discriminator = discriminatorConvention.GetDiscriminator(nominalType, type);
if (discriminator != (BsonValue)null)
{
bsonWriter.WriteName(discriminatorConvention.ElementName);
discriminator.WriteTo(bsonWriter);
}
}
foreach (BsonMemberMap bsonMemberMap in bsonClassMap.MemberMaps)
{
if (bsonMemberMap != memberMap)
{
if (bsonMemberMap == bsonClassMap.ExtraElementsMemberMap)
{
this.SerializeExtraElements(bsonWriter, value, bsonMemberMap);
}
else
{
this.SerializeMember(bsonWriter, value, bsonMemberMap);
}
}
}
bsonWriter.WriteEndDocument();
}
}
private void SerializeDiscriminator(BsonSerializationContext context, Type nominalType, object obj)
{
IDiscriminatorConvention discriminatorConvention = BsonSerializer.LookupDiscriminatorConvention(_classMap.ClassType);
BsonValue discriminator = discriminatorConvention?.GetDiscriminator(nominalType, obj.GetType());
if (discriminator != null)
{
context.Writer.WriteName(discriminatorConvention.ElementName);
BsonValueSerializer.Instance.Serialize(context, discriminator);
}
}
/// <summary>
/// Serializes a value.
/// </summary>
/// <param name="context">The serialization context.</param>
/// <param name="value">The value.</param>
public override void Serialize(BsonSerializationContext context, TValue value)
{
var bsonWriter = context.Writer;
var nominalType = context.NominalType;
var actualType = value.GetType();
var discriminator = _discriminatorConvention.GetDiscriminator(nominalType, actualType);
bsonWriter.WriteStartDocument();
bsonWriter.WriteName(_discriminatorConvention.ElementName);
context.SerializeWithChildContext(BsonValueSerializer.Instance, discriminator);
bsonWriter.WriteName("_v");
_wrappedSerializer.Serialize(context.CreateChild(actualType), value);
bsonWriter.WriteEndDocument();
}
/// <summary>
/// Serializes a value.
/// </summary>
/// <param name="context">The serialization context.</param>
/// <param name="args">The serialization args.</param>
/// <param name="value">The value.</param>
public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, TValue value)
{
var bsonWriter = context.Writer;
var nominalType = args.NominalType;
var actualType = value.GetType();
var discriminator = _discriminatorConvention.GetDiscriminator(nominalType, actualType);
bsonWriter.WriteStartDocument();
bsonWriter.WriteName(_discriminatorConvention.ElementName);
BsonValueSerializer.Instance.Serialize(context, discriminator);
bsonWriter.WriteName("_v");
args.NominalType = actualType;
_wrappedSerializer.Serialize(context, args, value);
bsonWriter.WriteEndDocument();
}
/// <summary>
/// If the type is not registered, attach it to our discriminator
/// </summary>
/// <param name="actualType">the type to examine</param>
protected void RegisterNewTypesToDiscriminator(Type actualType)
{
// we've detected a new concrete type that isn't registered in MongoDB's serializer
if (actualType != typeof(object) && !actualType.GetTypeInfo().IsInterface&& !BsonSerializer.IsTypeDiscriminated(actualType))
{
try
{
BsonSerializer.RegisterDiscriminatorConvention(actualType, DiscriminatorConvention);
BsonSerializer.RegisterDiscriminator(actualType, DiscriminatorConvention.GetDiscriminator(typeof(object), actualType));
}
catch (BsonSerializationException)
{
// the MongoDB driver library has no nice mechanism for checking if a discriminator convention is registerd.
// The "Lookup" logic tends to define a default if it doesn't exist.
// So we're forced to eat the "duplicate registration" exception.
}
}
}
