private static Func <DeserializationContext, object> ForCollection(Type type, Func <Type, TypeDescriptor> descriptorSource)
{
var element = ReflectionUtils.FindCollectionElementType(type);
var constructor = ReflectionUtils.BuildConstructor(typeof(List <>).MakeGenericType(element));
var elementDescriptor = descriptorSource(element);
return(context =>
{
var reader = context.Reader;
var bufferPart = new BufferPart();
var token = reader.Read(ref bufferPart, out var _);
if (token == JsonToken.Null)
{
return null;
}
var target = (IList)constructor();
if (token != JsonToken.ArrayStart)
{
throw Exceptions.BadToken(reader, token, JsonToken.ObjectStart);
}
var finalizer = type.IsArray
? new Func <IList, object>(i =>
{
var array = Array.CreateInstance(element, i.Count);
i.CopyTo(array, 0);
return array;
})
: null;
var isFirst = true;
while (true)
{
if (reader.PeekToken() == JsonToken.ArrayEnd)
{
reader.Read(ref bufferPart, out var _);
return finalizer != null?finalizer(target) : target;
}
if (!isFirst)
{
token = reader.Read(ref bufferPart, out var _);
if (token != JsonToken.ValueSeparator)
{
throw Exceptions.BadToken(reader, token, JsonToken.ValueSeparator);
}
}
var item = elementDescriptor.Reader(context);
target.Add(item);
isFirst = false;
}
});
}
private static Action <object, SerializationContext> ForCollection(Type root, Func <Type, TypeDescriptor> descriptorSource)
{
var elementType = ReflectionUtils.FindCollectionElementType(root);
var descriptor = descriptorSource(elementType);
return((obj, context) =>
{
var writer = context.Writer;
if (obj == null)
{
writer.WriteNull();
return;
}
writer.BeginArray();
context.Depth--;
foreach (var item in (IEnumerable)obj)
{
writer.ArrayItem();
descriptor.Writer(item, context);
}
context.Depth++;
writer.EndArray();
});
}
