X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcollection.h;h=2d346d9a4557a72325a18ae6f89c232e5f629681;hb=35d0da96bad97214376f18d15078e6d731e6f219;hp=303697a8c726f7c71e99c3a8d8e6582be998b87b;hpb=55592b9eeaff3d41e5f03b9c0c1566ed508f38a5;p=libs%2Fdatafile.git

diff --git a/source/collection.h b/source/collection.h
index 303697a..2d346d9 100644
--- a/source/collection.h
+++ b/source/collection.h
@@ -1,13 +1,8 @@
-/* $Id$
-
-This file is part of libmspdatafile
-Copyright © 2006  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_DATAFILE_COLLECTION_H_
 #define MSP_DATAFILE_COLLECTION_H_
 
+#include <msp/core/meta.h>
+#include <msp/core/maputils.h>
 #include <msp/core/refptr.h>
 #include "loader.h"
 
@@ -31,14 +26,6 @@ struct NeedsCollection
 	enum { result=(sizeof(f<T>(0))==sizeof(Yes)) };
 };
 
-template<typename T>
-struct RemoveConst
-{ typedef T Type; };
-
-template<typename T>
-struct RemoveConst<const T>
-{ typedef T Type; };
-
 /**
 A collection of objects that can be loaded from a datafile.  Each object is
 identified by a name, which must be unique across the entire collection.
@@ -121,7 +108,7 @@ private:
 	template<typename S>
 	struct ItemCreatorBridge: public ItemCreatorBase
 	{
-		virtual S *create(Collection &, const std::string &) const =0;
+		virtual S *create(Collection &, const std::string &) const = 0;
 	};
 
 	template<typename T, typename S, typename C>
@@ -192,10 +179,11 @@ public:
 	template<typename T>
 	void add(const std::string &name, T *d)
 	{
-		if(items.count(name))
-			throw KeyError("Duplicate key in collection", name);
+		typedef typename RemoveConst<T>::Type NCT;
 
-		items[name]=new Item<typename RemoveConst<T>::Type>(d);
+		RefPtr<Item<NCT> > i=new Item<NCT>(d);
+		insert_unique(items, i.get());
+		i.release();
 	}
 
 	/**
@@ -206,11 +194,9 @@ public:
 	{
 		typedef typename RemoveConst<T>::Type NCT;
 
-		ItemMap::const_iterator i=items.find(name);
-		if(i==items.end())
-			throw KeyError("Item not found in collection", name);
+		ItemBase *i=get_item(items, name);
 
-		const Item<NCT> *item=dynamic_cast<const Item<NCT> *>(i->second);
+		const Item<NCT> *item=dynamic_cast<const Item<NCT> *>(i);
 		if(!item)
 			throw TypeError("Type mismatch on item '"+name+"'");
 
@@ -227,8 +213,7 @@ public:
 	{
 		typedef typename RemoveConst<T>::Type NCT;
 
-		ItemMap::const_iterator i=items.find(name);
-		if(i==items.end())
+		if(!items.count(name))
 		{
 			for(ItemCreatorSeq::iterator j=creators.begin(); j!=creators.end(); ++j)
 			{
@@ -240,10 +225,11 @@ public:
 					return d;
 				}
 			}
-			throw KeyError("Item not found in collection", name);
 		}
 
-		const Item<NCT> *item=dynamic_cast<const Item<NCT> *>(i->second);
+		ItemBase *i=get_item(items, name);
+
+		const Item<NCT> *item=dynamic_cast<const Item<NCT> *>(i);
 		if(!item)
 			throw TypeError("Type mismatch on item '"+name+"'");
 
@@ -284,6 +270,22 @@ public:
 	*/
 	bool contains(const std::string &n) const;
 
+	/**
+	Returns the name of an item in the collection.
+	*/
+	template<typename T>
+	const std::string &get_name(T *d) const
+	{
+		typedef typename RemoveConst<T>::Type NCT;
+
+		for(ItemMap::const_iterator i=items.begin(); i!=items.end(); ++i)
+			if(Item<NCT> *item=dynamic_cast<Item<NCT> *>(i->second))
+				if(item->data==d)
+					return i->first;
+	
+		throw KeyError("Item not found in collection");
+	}
+
 protected:
 	/**
 	Adds a type that can be loaded from datafiles.