From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 10 Jul 2012 15:28:11 +0000 (+0300)
Subject: Add DerivedObjectLoader class
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=f51adf2b95f32bdda4d90eb52431405c3ecf8db1;p=libs%2Fdatafile.git

Add DerivedObjectLoader class
---

diff --git a/source/objectloader.h b/source/objectloader.h
index f1cb6ff..5928714 100644
--- a/source/objectloader.h
+++ b/source/objectloader.h
@@ -35,6 +35,26 @@ public:
 };
 
 
+/**
+Convenience class for loading derived objects.  Inherits from the base class
+loader and shadows its members with ones for the derived type.
+*/
+template<typename O, typename B>
+class DerivedObjectLoader: public B::Loader
+{
+public:
+	typedef O Object;
+
+protected:
+	O &obj;
+
+	DerivedObjectLoader(O &o): B::Loader(o), obj(o) { }
+
+public:
+	O &get_object() const { return obj; }
+};
+
+
 /**
 Provides functionality for loading objects with a Collection.  Deriving from
 this allows loading pointers to objects in the collection automatically.