From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 18 Aug 2012 21:16:50 +0000 (+0300)
Subject: Proper loading of collection-enabled objects in DirectoryCollection
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=eed15dceed29d1bb378082e08114ea81005203c1;p=libs%2Fdatafile.git

Proper loading of collection-enabled objects in DirectoryCollection
---

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