public bool GetDocumentId(object document, out object id, out Type idNominalType, out IIdGenerator idGenerator)
{
MongoDynamic x = (MongoDynamic)document;
id = x._id;
idNominalType = typeof(ObjectId);
idGenerator = new ObjectIdGenerator();
return(true);
}
public override object Deserialize(BsonReader bsonReader, Type nominalType, IBsonSerializationOptions options)
{
var bsonType = bsonReader.CurrentBsonType;
if (bsonType == BsonType.Null)
{
bsonReader.ReadNull();
return(null);
}
else if (bsonType == BsonType.Document)
{
var os = new ObjectSerializer();
MongoDynamic md = new MongoDynamic();
bsonReader.ReadStartDocument();
Dictionary <string, Type> typeMap = null;
// scan document first to find interfaces
{
var bookMark = bsonReader.GetBookmark();
if (bsonReader.FindElement(MongoDynamic.InterfacesField))
{
md[MongoDynamic.InterfacesField] = BsonSerializer.Deserialize <BsonValue>(bsonReader).AsBsonArray.Select(x => x.AsString);
typeMap = md.GetTypeMap();
}
else
{
throw new FormatException("No interfaces defined for this dynamic object - can't deserialize it");
}
bsonReader.ReturnToBookmark(bookMark);
}
while (bsonReader.ReadBsonType() != BsonType.EndOfDocument)
{
var name = bsonReader.ReadName();
if (name == "_id")
{
//md[name] = BsonValue.ReadFrom(bsonReader).AsObjectId;
md[name] = BsonSerializer.Deserialize <ObjectId>(bsonReader);
}
else if (name == MongoDynamic.InterfacesField)
{
// Read it and ignore it, we already have it
//BsonValue.ReadFrom(bsonReader);
BsonSerializer.Deserialize <ObjectId>(bsonReader);
}
else
{
if (typeMap == null)
{
throw new FormatException("No interfaces define for this dynamic object - can't deserialize");
}
// lookup the type for this element according to the interfaces
Type elementType;
if (typeMap.TryGetValue(name, out elementType))
{
var value = BsonSerializer.Deserialize(bsonReader, elementType);
md[name] = value;
}
else
{
// This is a value that is no longer in the interface, maybe a column you removed
// not really much we can do with it ... but we need to read it and move on
var value = BsonSerializer.Deserialize(bsonReader, typeof(object));
md[name] = value;
// As with all databases, removing elements from the schema is always going to cause problems ...
}
}
}
bsonReader.ReadEndDocument();
return(md);
}
else
{
var message = string.Format("Can't deserialize a {0} from BsonType {1}.", nominalType.FullName, bsonType);
throw new FormatException(message);
}
}
public void SetDocumentId(object document, object id)
{
MongoDynamic x = (MongoDynamic)document;
x._id = (ObjectId)id;
}
