private void UpdateItem(ObjectOrValueNode node, MetadataInfo info)
{
var newInstance = info.GetValue(node.Instance);
if (newInstance == null)
{
node.Metadata[info] = null;
}
else
{
var newItem = RegisterItem(newInstance, node);
node.Metadata[info] = newItem;
}
}
private void AnalyzeItem(ObjectOrValueNode node)
{
foreach (var p in _typeMemberRequirements.Where(p => p.Key.IsAssignableFrom(node.Instance.GetType())).SelectMany(v => v.Value))
{
UpdateItem(node, p);
}
}
private RenderNode RegisterItem(object instance, RenderNode dependent)
{
if (instance == null)
return null;
RenderNode result;
if (!_items.TryGetValue(instance, out result))
{
IEnumerable<object> elements;
switch (_strategy.ClassifyInstance(instance, out elements))
{
case InstanceType.Object:
result = new ObjectOrValueNode(instance, _nextId++, false);
break;
case InstanceType.Value:
result = new ObjectOrValueNode(instance, _nextId++, true);
break;
case InstanceType.Link:
result = new LinkNode(instance, _nextId++);
break;
case InstanceType.Collection:
var collection = new CollectionNode(instance, _nextId++);
result = collection;
collection.Elements.AddRange(elements.Select(x => RegisterItem(x, result)));
break;
}
if (result != null)
{
_items[instance] = result;
_newItems.Enqueue(result);
}
}
if (result != null && dependent != null) // TODO: consider requiring non null
{
result.Dependents.Add(dependent);
dependent.Dependencies.Add(result);
}
return result;
}
protected string RenderValue(ObjectOrValueNode node)
{
var status = _renderSchedule.GetStatus(node);
status.HasEmitted = true;
var subject = node.Instance;
if (subject is string)
{
return subject.ToSingleQuotedJsString();
}
if (subject is bool)
{
return ((bool) subject) ? "true" : "false";
}
if (subject is byte
|| subject is sbyte
|| subject is short
|| subject is ushort
|| subject is int
|| subject is uint
|| subject is long
|| subject is ulong
|| subject is float
|| subject is double
|| subject is decimal)
{
return subject.ToString();
}
if (subject is Enum)
{
return Convert.ChangeType(subject, Enum.GetUnderlyingType(subject.GetType())).ToString();
}
var memberlist = node.Members.Select(RenderMember).ToList();
if (node.Metadata.Count > 0)
{
memberlist.Add(string.Format("__md: {{{0}}}", node.Metadata.Select(RenderMember)).Delimit(","));
}
return string.Format("{{{0}}}", memberlist.Delimit(","));
}