Add reverse name lookup to Collection

[libs/datafile.git] / source / collection.h

diff --git a/source/collection.h b/source/collection.h
index 303697a8c726f7c71e99c3a8d8e6582be998b87b..fa3a7de9dbe25441417f988fbe16a5235cbf638d 100644 (file)
--- a/source/collection.h
+++ b/source/collection.h
@@ -284,6 +284,22 @@ 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.