+ for(CollectionItemTypeBase *t: types)
+ delete t;
+}
+
+void Collection::add_var(const string &name, const CollectionItemTypeBase *type, const Variant &var)
+{
+ insert_unique(items, name, var);
+ try
+ {
+ if(type)
+ type->notify_item(name, var);
+ }
+ catch(...)
+ {
+ remove_existing(items, name);
+ throw;
+ }
+}
+
+const Variant &Collection::get_var(const string &name, const CollectionItemTypeBase *type)
+{
+ const Variant *var = find_var(name, type);
+ if(var)
+ return *var;
+
+ throw key_error(name);
+}
+
+const Variant *Collection::find_var(const string &name, const CollectionItemTypeBase *type)
+{
+ ItemMap::iterator i = items.find(name);
+ if(i!=items.end())
+ return &i->second;
+
+ if(type)
+ {
+ bool loaded = false;
+ if(type->can_create())
+ {
+ type->create_item(*this, name);
+ loaded = items.count(name);
+ }
+ for(auto j=sources.begin(); (!loaded && j!=sources.end()); ++j)
+ {
+ (*j)->load(*this, *type, name);
+ loaded = items.count(name);
+ }
+ if(!loaded && fallback)
+ if(CollectionItemTypeBase *fb_type = fallback->get_type(*type))
+ if(fallback->get_status(name, *fb_type))
+ return fallback->find_var(name, fb_type);
+ }
+
+ i = items.find(name);
+ return (i!=items.end() ? &i->second : nullptr);
+}
+
+void Collection::gather_items(vector<const Variant *> *vars, list<string> *names, const CollectionItemTypeBase &type, bool include_sources) const
+{
+ for(const auto &kvp: items)
+ if(type.check_item_type(kvp.second))
+ {
+ if(vars)
+ vars->push_back(&kvp.second);
+ if(names)
+ names->push_back(kvp.first);
+ }
+
+ if(include_sources && names)
+ gather_names_from_sources(*names, type);
+}
+
+unsigned Collection::get_status(const string &name, const CollectionItemTypeBase &type) const
+{
+ ItemMap::const_iterator i = items.find(name);
+ if(i==items.end())
+ {
+ auto j = find_if(sources, [&name, &type](const CollectionSource *s){ return s->is_loadable(type, name); });
+ if(j!=sources.end())
+ return 2;
+ if(fallback)
+ if(CollectionItemTypeBase *fb_type = fallback->get_type(type))
+ return fallback->get_status(name, *fb_type);
+ return 0;
+ }
+
+ return type.check_item_type(i->second);