From eed15dceed29d1bb378082e08114ea81005203c1 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 19 Aug 2012 00:16:50 +0300
Subject: [PATCH] Proper loading of collection-enabled objects in
 DirectoryCollection

---
 source/directorycollection.h | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/source/directorycollection.h b/source/directorycollection.h
index 54bf62a..e9a9463 100644
--- a/source/directorycollection.h
+++ b/source/directorycollection.h
@@ -13,6 +13,9 @@ A Collection that can automatically load items from files in a directory.
 class DirectoryCollection: public Collection
 {
 private:
+	template<typename T, bool = NeedsCollection<typename T::Loader>::value>
+	class ItemLoader;
+
 	std::list<FS::Path> dirs;
 
 public:
@@ -36,7 +39,10 @@ private:
 		if(lookup_file(name, file))
 		{
 			RefPtr<T> item = new T;
-			load(*item, file.str());
+			ItemLoader<T> ldr(*item, *this);
+			IO::BufferedFile in(file.str());
+			Parser parser(in, file.str());
+			ldr.load(parser);
 			return item.release();
 		}
 		else
@@ -47,6 +53,24 @@ protected:
 	bool lookup_file(const std::string &, FS::Path &) const;
 };
 
+template<typename T>
+class DirectoryCollection::ItemLoader<T, false>: public T::Loader
+{
+public:
+	ItemLoader(T &o, Collection &):
+		T::Loader(o)
+	{ }
+};
+
+template<typename T>
+class DirectoryCollection::ItemLoader<T, true>: public T::Loader
+{
+public:
+	ItemLoader(T &o, Collection &c):
+		T::Loader(o, dynamic_cast<typename T::Loader::Collection &>(c))
+	{ }
+};
+
 } // namespace DataFile
 } // namespace Msp
 
-- 
2.43.0