public override void Process(IMetaData metaData, ICustomAttributeProvider attributeProvider, IConfiguration config)
{
TypeData typeData = metaData as TypeData;
if (typeData == null)
return;
JsonExCollectionAttribute attr = ReflectionUtils.GetAttribute<JsonExCollectionAttribute>(attributeProvider, true);
if (attr == null)
return;
if (!attr.IsValid())
throw new Exception("Invalid JsonExCollectionAttribute specified for " + attributeProvider + ", either CollectionHandlerType or ItemType or both must be specified");
Type collHandlerType = attr.GetCollectionHandlerType();
Type itemType = attr.GetItemType();
// Try exact type match first
CollectionHandler handler = null;
if (collHandlerType == null)
{
handler = typeData.FindCollectionHandler();
handler = new CollectionHandlerWrapper(handler, typeData.ForType, itemType);
}
bool registerHandler = false;
if (handler == null)
{
handler = ConstructOrFindHandler(config, collHandlerType, ref registerHandler);
}
typeData.CollectionHandler = handler;
// install the handler
if (registerHandler)
config.RegisterCollectionHandler(handler);
}
/// <summary>
/// Reads the JsonExCollection attribute for the class and loads the collection handler from that. It first
/// checks the list of collectionhandlers to see if its already been loaded.
/// </summary>
/// <returns>CollectionHandler specified by the JsonExCollection attribute</returns>
protected virtual CollectionHandler GetCollectionHandlerFromAttribute()
{
JsonExCollectionAttribute attr = ((JsonExCollectionAttribute[])this.ForType.GetCustomAttributes(typeof(JsonExCollectionAttribute), true))[0];
if (!attr.IsValid())
throw new Exception("Invalid JsonExCollectionAttribute specified for " + this.ForType + ", either CollectionHandlerType or ItemType or both must be specified");
Type collHandlerType = attr.GetCollectionHandlerType();
Type itemType = attr.GetItemType();
// Try exact type match first
CollectionHandler handler = null;
if (collHandlerType == null)
{
handler = FindCollectionHandler();
handler = new CollectionHandlerWrapper(handler, this.ForType, itemType);
}
if (handler == null)
{
handler = context.CollectionHandlers.Find(delegate(CollectionHandler h) { return h.GetType() == collHandlerType; });
if (handler != null)
return handler;
// try inherited type next
handler = context.CollectionHandlers.Find(delegate(CollectionHandler h) { return collHandlerType.IsInstanceOfType(h); });
if (handler != null)
return handler;
// create the handler
handler = (CollectionHandler)Activator.CreateInstance(collHandlerType);
}
// install the handler
context.RegisterCollectionHandler(handler);
return handler;
}
