public FieldHiderBookmark(BsonReaderBookmark parentBookmark, BsonReaderState?currentState, string currentName, int currentDepth)
: base(currentState ?? parentBookmark.State, parentBookmark.CurrentBsonType, currentName ?? parentBookmark.CurrentName)
{
_currentState = currentState;
_currentName = currentName;
_currentDepth = currentDepth;
_parentBookmark = parentBookmark;
}
public void ReturnToBookmark(BsonReaderBookmark bookmark)
{
var fieldHiderBookmark = (FieldHiderBookmark)bookmark;
_parent.ReturnToBookmark(fieldHiderBookmark._parentBookmark);
_currentDepth = fieldHiderBookmark._currentDepth;
_currentName = fieldHiderBookmark._currentName;
_currentState = fieldHiderBookmark._currentState;
}
public Type GetActualType(BsonReader bsonReader, Type nominalType)
{
BsonReaderBookmark bookmark = bsonReader.GetBookmark();
bsonReader.ReadStartDocument();
Type actualType = nominalType;
if (bsonReader.FindElement("Type"))
{
BsonValue discriminator = BsonSerializer.Deserialize <BsonValue>(bsonReader);
actualType = BsonSerializer.LookupActualType(nominalType, discriminator);
}
bsonReader.ReturnToBookmark(bookmark);
return(actualType);
}
/***************************************************/
public override object Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
{
// This is where we can call the Version_Engine to return the new type string from the old on if exist
BsonReaderBookmark bookmark = context.Reader.GetBookmark();
IBsonSerializer bSerializer = BsonSerializer.LookupSerializer(typeof(BsonDocument));
BsonDocument doc = bSerializer.Deserialize(context, args) as BsonDocument;
BsonDocument newDoc = Versioning.Convert.ToNewVersion(doc);
if (newDoc == null || newDoc.Equals(doc))
{
Engine.Reflection.Compute.RecordWarning("The type " + doc["_t"] + " is unknown -> data returned as custom objects.");
context.Reader.ReturnToBookmark(bookmark);
IBsonSerializer customSerializer = BsonSerializer.LookupSerializer(typeof(CustomObject));
return(customSerializer.Deserialize(context, args));
}
else
{
return(Convert.FromBson(newDoc));
}
}
/// <summary>
/// Deserializes an object from a binary source.
/// </summary>
/// <param name="Reader">Binary deserializer.</param>
/// <param name="DataType">Optional datatype. If not provided, will be read from the binary source.</param>
/// <param name="Embedded">If the object is embedded into another.</param>
/// <returns>Deserialized object.</returns>
public override object Deserialize(IBsonReader Reader, BsonType?DataType, bool Embedded)
{
BsonReaderBookmark Bookmark = Reader.GetBookmark();
BsonType? DataTypeBak = DataType;
if (!DataType.HasValue)
{
DataType = Reader.ReadBsonType();
}
switch (DataType.Value)
{
case BsonType.Document:
break;
case BsonType.Boolean:
return(Reader.ReadBoolean());
case BsonType.Int32:
return(Reader.ReadInt32());
case BsonType.Int64:
return(Reader.ReadInt64());
case BsonType.Decimal128:
return((decimal)Reader.ReadDecimal128());
case BsonType.Double:
return(Reader.ReadDouble());
case BsonType.DateTime:
return(ObjectSerializer.UnixEpoch.AddMilliseconds(Reader.ReadDateTime()));
case BsonType.String:
case BsonType.Symbol:
case BsonType.JavaScript:
case BsonType.JavaScriptWithScope:
return(Reader.ReadString());
case BsonType.Binary:
return(Reader.ReadBytes());
case BsonType.Null:
Reader.ReadNull();
return(null);
default:
throw new Exception("Object or value expected.");
}
LinkedList <KeyValuePair <string, object> > Properties = new LinkedList <KeyValuePair <string, object> >();
LinkedList <KeyValuePair <string, object> > LowerCase = null;
string TypeName = string.Empty;
Guid ObjectId = Guid.Empty;
string CollectionName = string.Empty;
string FieldName;
BsonType ValueType;
object Value;
Reader.ReadStartDocument();
while (Reader.State == BsonReaderState.Type)
{
ValueType = Reader.ReadBsonType();
if (ValueType == BsonType.EndOfDocument)
{
break;
}
FieldName = Reader.ReadName();
switch (ValueType)
{
case BsonType.Array:
Value = GeneratedObjectSerializerBase.ReadArray(null, this.Provider, Reader, ValueType);
break;
case BsonType.Binary:
Value = Reader.ReadBytes();
break;
case BsonType.Boolean:
Value = Reader.ReadBoolean();
break;
case BsonType.DateTime:
Value = ObjectSerializer.UnixEpoch.AddMilliseconds(Reader.ReadDateTime());
break;
case BsonType.Decimal128:
Value = (decimal)Reader.ReadDecimal128();
break;
case BsonType.Document:
Value = this.Deserialize(Reader, ValueType, true);
break;
case BsonType.Double:
Value = Reader.ReadDouble();
break;
case BsonType.Int32:
Value = Reader.ReadInt32();
break;
case BsonType.Int64:
Value = Reader.ReadInt64();
break;
case BsonType.JavaScript:
Value = Reader.ReadJavaScript();
break;
case BsonType.JavaScriptWithScope:
Value = Reader.ReadJavaScriptWithScope();
break;
case BsonType.Null:
Value = null;
Reader.ReadNull();
break;
case BsonType.ObjectId:
Value = Reader.ReadObjectId();
break;
case BsonType.String:
Value = Reader.ReadString();
break;
case BsonType.Symbol:
Value = Reader.ReadSymbol();
break;
default:
throw new Exception("Unrecognized data type: " + ValueType.ToString());
}
switch (FieldName)
{
case "_id":
if (Value is Guid Guid)
{
ObjectId = Guid;
}
else if (Value is string s)
{
ObjectId = new Guid(s);
}
else if (Value is byte[] A)
{
ObjectId = new Guid(A);
}
else if (Value is ObjectId ObjId)
{
ObjectId = GeneratedObjectSerializerBase.ObjectIdToGuid(ObjId);
}
else
{
throw new Exception("Unrecognized Object ID type: " + Value.GetType().FullName);
}
break;
case "_type":
TypeName = Value?.ToString();
if (this.returnTypedObjects && !string.IsNullOrEmpty(TypeName))
{
Type DesiredType = Types.GetType(TypeName);
if (DesiredType is null)
{
DesiredType = typeof(GenericObject);
}
if (DesiredType != typeof(GenericObject))
{
IObjectSerializer Serializer2 = this.provider.GetObjectSerializer(DesiredType);
Reader.ReturnToBookmark(Bookmark);
return(Serializer2.Deserialize(Reader, DataTypeBak, Embedded));
}
}
break;
case "_collection":
CollectionName = Value?.ToString();
break;
default:
if (FieldName.EndsWith("_L"))
{
string s = FieldName.Substring(0, FieldName.Length - 2);
bool Ignore = false;
foreach (KeyValuePair <string, object> P in Properties)
{
if (P.Key == s)
{
Ignore = true;
break;
}
}
if (!Ignore)
{
if (LowerCase is null)
{
LowerCase = new LinkedList <KeyValuePair <string, object> >();
}
LowerCase.AddLast(new KeyValuePair <string, object>(s, Value));
}
}
else
{
Properties.AddLast(new KeyValuePair <string, object>(FieldName, Value));
}
break;
}
}
if (!(LowerCase is null))
{
foreach (KeyValuePair <string, object> P in LowerCase)
{
bool Ignore = false;
foreach (KeyValuePair <string, object> P2 in Properties)
{
if (P2.Key == P.Key)
{
Ignore = true;
break;
}
}
if (!Ignore)
{
Properties.AddLast(new KeyValuePair <string, object>(P.Key + "_L", P.Value));
}
}
}
Reader.ReadEndDocument();
return(new GenericObject(CollectionName, TypeName, ObjectId, Properties));
}
/***************************************************/
private object DeserializeDiscriminatedValue(BsonDeserializationContext context, BsonDeserializationArgs args)
{
// First try to recover the object type
IBsonReader reader = context.Reader;
BsonReaderBookmark bookmark = reader.GetBookmark();
Type actualType = typeof(CustomObject);
try
{
actualType = _discriminatorConvention.GetActualType(reader, typeof(object));
}
catch (Exception e)
{
BsonDocument doc = null;
try
{
context.Reader.ReturnToBookmark(bookmark);
IBsonSerializer bSerializer = BsonSerializer.LookupSerializer(typeof(BsonDocument));
doc = bSerializer.Deserialize(context, args) as BsonDocument;
}
catch { }
if (doc != null && doc.Contains("_t") && doc["_t"].AsString == "DBNull")
{
return(null);
}
else
{
actualType = typeof(IDeprecated);
}
}
context.Reader.ReturnToBookmark(bookmark);
if (actualType == null)
{
return(null);
}
// Make sure the type is not deprecated
if (Config.AllowUpgradeFromBson && actualType.IIsDeprecated() && !Config.TypesWithoutUpgrade.Contains(actualType))
{
actualType = typeof(IDeprecated);
}
// Handle the special case where the type is object
if (actualType == typeof(object))
{
BsonType currentBsonType = reader.GetCurrentBsonType();
if (currentBsonType == BsonType.Document && context.DynamicDocumentSerializer != null)
{
return(context.DynamicDocumentSerializer.Deserialize(context, args));
}
reader.ReadStartDocument();
reader.ReadEndDocument();
return(new object());
}
// Handle the general case of finding the correct deserialiser and calling it
try
{
IBsonSerializer bsonSerializer = BsonSerializer.LookupSerializer(actualType);
if (bsonSerializer.GetType().Name == "EnumerableInterfaceImplementerSerializer`2" && context.Reader.CurrentBsonType == BsonType.Document)
{
if (!m_FallbackSerialisers.ContainsKey(actualType))
{
CreateFallbackSerialiser(actualType);
}
bsonSerializer = m_FallbackSerialisers[actualType];
}
return(bsonSerializer.Deserialize(context, args));
}
catch (Exception e)
{
context.Reader.ReturnToBookmark(bookmark);
if (e is FormatException && e.InnerException != null && (e.InnerException is FormatException || e.InnerException is BsonSerializationException))
{
// A child of the object is causing problems. Try to recover from custom object
IBsonSerializer customSerializer = BsonSerializer.LookupSerializer(typeof(CustomObject));
object result = customSerializer.Deserialize(context, args);
Guid objectId = ((CustomObject)result).BHoM_Guid;
if (!Config.TypesWithoutUpgrade.Contains(actualType))
{
if (m_StackCounter.ContainsKey(objectId))
{
m_StackCounter[objectId] += 1;
}
else
{
m_StackCounter[objectId] = 1;
}
if (m_StackCounter[objectId] < 10)
{
result = Convert.FromBson(result.ToBson());
m_StackCounter.Remove(objectId);
}
}
if (result is CustomObject)
{
Engine.Reflection.Compute.RecordWarning("The type " + actualType.FullName + " is unknown -> data returned as custom objects.");
Config.TypesWithoutUpgrade.Add(actualType);
}
return(result);
}
else if (actualType != typeof(IDeprecated))
{
// Try the deprecated object serialiser
IBsonSerializer deprecatedSerializer = BsonSerializer.LookupSerializer(typeof(IDeprecated));
return(deprecatedSerializer.Deserialize(context, args));
}
else
{
// Last resort: just return the custom object
Engine.Reflection.Compute.RecordWarning("The type " + actualType.FullName + " is unknown -> data returned as custom objects.");
IBsonSerializer customSerializer = BsonSerializer.LookupSerializer(typeof(CustomObject));
return(customSerializer.Deserialize(context, args));
}
}
}
/***************************************************/
private object DeserializeDiscriminatedValue(BsonDeserializationContext context, BsonDeserializationArgs args)
{
// First try to recover the object type
IBsonReader reader = context.Reader;
BsonReaderBookmark bookmark = reader.GetBookmark();
Type actualType = typeof(CustomObject);
try
{
actualType = _discriminatorConvention.GetActualType(reader, typeof(object));
}
catch
{
try
{
context.Reader.ReturnToBookmark(bookmark);
DeprecatedSerializer deprecatedSerialiser = new DeprecatedSerializer();
return(deprecatedSerialiser.Deserialize(context, args));
}
catch { }
}
context.Reader.ReturnToBookmark(bookmark);
if (actualType == null)
{
return(null);
}
// Handle the special case where the type is object
if (actualType == typeof(object))
{
BsonType currentBsonType = reader.GetCurrentBsonType();
if (currentBsonType == BsonType.Document && context.DynamicDocumentSerializer != null)
{
return(context.DynamicDocumentSerializer.Deserialize(context, args));
}
reader.ReadStartDocument();
reader.ReadEndDocument();
return(new object());
}
// Handle the general case of finding the correct deserialiser and calling it
try
{
if (!BsonClassMap.IsClassMapRegistered(actualType))
{
Compute.RegisterClassMap(actualType); // LookupSerializer creates the classMap if it doesn't exist so important to do it through our own method
}
IBsonSerializer bsonSerializer = BsonSerializer.LookupSerializer(actualType);
if (bsonSerializer.GetType().Name == "EnumerableInterfaceImplementerSerializer`2" && context.Reader.CurrentBsonType == BsonType.Document)
{
if (!m_FallbackSerialisers.ContainsKey(actualType))
{
CreateFallbackSerialiser(actualType);
}
bsonSerializer = m_FallbackSerialisers[actualType];
}
else if (actualType.Name == "Dictionary`2" && context.Reader.CurrentBsonType == BsonType.Document)
{
DictionarySerializer dicSerialiser = new DictionarySerializer();
return(dicSerialiser.Deserialize(context, args));
}
return(bsonSerializer.Deserialize(context, args));
}
catch (Exception e)
{
if (e.Message.Contains("Could not load file or assembly"))
{
Engine.Reflection.Compute.RecordError(e.Message);
}
context.Reader.ReturnToBookmark(bookmark);
DeprecatedSerializer deprecatedSerialiser = new DeprecatedSerializer();
return(deprecatedSerialiser.Deserialize(context, args));
}
}
/***************************************************/
private object DeserializeDiscriminatedValue(BsonDeserializationContext context, BsonDeserializationArgs args)
{
// First try to recover the object type
IBsonReader reader = context.Reader;
BsonReaderBookmark bookmark = reader.GetBookmark();
Type actualType = typeof(CustomObject);
try
{
actualType = _discriminatorConvention.GetActualType(reader, typeof(object));
}
catch
{
// This is were we can call the Version_Engine to return the new type string from the old one if exists
string recordedType = GetCurrentTypeValue(reader);
// If failed, return Custom object
context.Reader.ReturnToBookmark(bookmark);
Engine.Reflection.Compute.RecordWarning("The type " + recordedType + " is unknown -> data returned as custom objects.");
IBsonSerializer customSerializer = BsonSerializer.LookupSerializer(typeof(CustomObject));
return(customSerializer.Deserialize(context, args));
}
// Handle the special case where the type is object
if (actualType == typeof(object))
{
BsonType currentBsonType = reader.GetCurrentBsonType();
if (currentBsonType == BsonType.Document && context.DynamicDocumentSerializer != null)
{
return(context.DynamicDocumentSerializer.Deserialize(context, args));
}
reader.ReadStartDocument();
reader.ReadEndDocument();
return(new object());
}
// Handle the genral case of finding the correct deserialiser and calling it
IBsonSerializer bsonSerializer = BsonSerializer.LookupSerializer(actualType);
IBsonPolymorphicSerializer bsonPolymorphicSerializer = bsonSerializer as IBsonPolymorphicSerializer;
if (bsonPolymorphicSerializer != null && bsonPolymorphicSerializer.IsDiscriminatorCompatibleWithObjectSerializer)
{
bookmark = context.Reader.GetBookmark();
try
{
return(bsonSerializer.Deserialize(context, args));
}
catch
{
context.Reader.ReturnToBookmark(bookmark);
Engine.Reflection.Compute.RecordWarning("Cannot find a definition of type " + actualType.FullName + " that matches the object to deserialise -> data returned as custom objects.");
IBsonSerializer customSerializer = BsonSerializer.LookupSerializer(typeof(CustomObject));
CustomObject fallback = customSerializer.Deserialize(context, args) as CustomObject;
//This is where we will try to get the correct object type from the custom object using the versionning engine
// If failed, just return the custom object
return(fallback);
}
}
object result = null;
bool flag = false;
reader.ReadStartDocument();
while (reader.ReadBsonType() != 0)
{
string text = reader.ReadName();
if (text == _discriminatorConvention.ElementName)
{
reader.SkipValue();
}
else
{
if (!(text == "_v"))
{
throw new FormatException($"Unexpected element name: '{text}'.");
}
result = bsonSerializer.Deserialize(context);
flag = true;
}
}
reader.ReadEndDocument();
if (!flag)
{
throw new FormatException("_v element missing.");
}
return(result);
}
