/// <summary>
/// Define a subdocument (or a list of) as a reference
/// </summary>
public EntityBuilder <T> DbRef <K>(Expression <Func <T, K> > property, string collectionName)
{
if (string.IsNullOrEmpty(collectionName))
{
throw new ArgumentNullException("collectionName");
}
return(this.GetProperty(property, (p) =>
{
var typeRef = typeof(K);
if (Reflection.IsList(typeRef))
{
var itemType = typeRef.IsArray ? typeRef.GetElementType() : Reflection.UnderlyingTypeOf(typeRef);
var mapper = _mapper.GetPropertyMapper(itemType);
RegisterDbRefList(p, collectionName, typeRef, itemType, mapper);
}
else
{
var mapper = _mapper.GetPropertyMapper(typeRef);
RegisterDbRef(p, collectionName, typeRef, mapper);
}
}));
}
internal object Deserialize(Type type, BsonValue value)
{
Func <BsonValue, object> custom;
// null value - null returns
if (value.IsNull)
{
return(null);
}
// if is nullable, get underlying type
else if (Reflection.IsNullable(type))
{
type = Reflection.UnderlyingTypeOf(type);
}
// check if your type is already a BsonValue/BsonDocument/BsonArray
if (type == typeof(BsonValue))
{
return(new BsonValue(value));
}
else if (type == typeof(BsonDocument))
{
return(value.AsDocument);
}
else if (type == typeof(BsonArray))
{
return(value.AsArray);
}
// raw values to native bson values
else if (_bsonTypes.Contains(type))
{
return(value.RawValue);
}
// simple ConvertTo to basic .NET types
else if (_basicTypes.Contains(type))
{
return(Convert.ChangeType(value.RawValue, type));
}
// enum value is a string
else if (type.IsEnum)
{
return(Enum.Parse(type, value.AsString));
}
// test if has a custom type implementation
else if (_customDeserializer.TryGetValue(type, out custom))
{
return(custom(value));
}
// if value is array, deserialize as array
else if (value.IsArray)
{
if (type.IsArray)
{
return(this.DeserializeArray(type.GetElementType(), value.AsArray));
}
else
{
return(this.DeserializeList(type, value.AsArray));
}
}
// if value is document, deserialize as document
else if (value.IsDocument)
{
BsonValue typeField;
var doc = value.AsDocument;
// test if value is object and has _type
if (doc.RawValue.TryGetValue("_type", out typeField))
{
type = Type.GetType(typeField.AsString);
}
var o = Reflection.CreateInstance(type);
if (o is IDictionary && type.IsGenericType)
{
var k = type.GetGenericArguments()[0];
var t = type.GetGenericArguments()[1];
this.DeserializeDictionary(k, t, (IDictionary)o, value.AsDocument);
}
else
{
this.DeserializeObject(type, o, doc);
}
return(o);
}
// in last case, return value as-is - can cause "cast error"
// it's used for "public object MyInt { get; set; }"
return(value.RawValue);
}
