X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fobjectloader.h;fp=source%2Fobjectloader.h;h=515ea6b8b81c6d51338735a704f960a0f27b802a;hb=3eb3c5cce35d3d6193afadecc3707f9c2448f370;hp=0000000000000000000000000000000000000000;hpb=b34b46788d69853eabdbbd9e71ca82f2f5c09df8;p=libs%2Fdatafile.git

diff --git a/source/objectloader.h b/source/objectloader.h
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+/* $Id$
+
+This file is part of libmspdatafile
+Copyright © 2010  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#ifndef MSP_DATAFILE_OBJECTLOADER_H_
+#define MSP_DATAFILE_OBJECTLOADER_H_
+
+#include "loader.h"
+
+namespace Msp {
+namespace DataFile {
+
+class Collection;
+
+/**
+Provides the basic functionality of an object loader.  Deriving from this
+allows loading values directly into member variables of the objects.
+*/
+template<typename O>
+class ObjectLoader: public Loader
+{
+public:
+	typedef O Object;
+
+protected:
+	O &obj;
+
+	ObjectLoader(O &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.
+*/
+template<typename O, typename C = Collection>
+class CollectionObjectLoader: public ObjectLoader<O>
+{
+public:
+	typedef C Collection;
+
+protected:
+	C *coll;
+
+	CollectionObjectLoader(O &o, C *c): ObjectLoader<O>(o), coll(c) { }
+
+public:
+	C &get_collection() const
+	{
+		if(!coll)
+			throw InvalidState("No collection");
+		return *coll;
+	}
+};
+
+} // namespace DataFile
+} // namespace Msp
+
+#endif