private object DeserializeList(Type type, BsonArray value)
{
var itemType = type.GetGenericArguments().FirstOrDefault() ?? type.GetInterfaces().First(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IEnumerable <>)).GetGenericArguments().First();
var enumerable = (IEnumerable)Reflection.CreateInstance(type);
var list = enumerable as IList;
if (list != null)
{
foreach (BsonValue item in value)
{
list.Add(Deserialize(itemType, item));
}
}
else
{
var addMethod = type.GetMethod("Add");
foreach (BsonValue item in value)
{
addMethod.Invoke(enumerable, new[] { Deserialize(itemType, item) });
}
}
return(enumerable);
}
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);
}
