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diff --git a/ingen/URIMap.hpp b/ingen/URIMap.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2007-2012 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or any later version.
+
+  Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_URIMAP_HPP
+#define INGEN_URIMAP_HPP
+
+#include <map>
+#include <utility>
+
+#include "ingen/LV2Features.hpp"
+#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
+#include "raul/URI.hpp"
+#include "raul/Noncopyable.hpp"
+
+namespace Ingen {
+
+/** URI to integer map and implementation of LV2 URID extension.
+ * @ingroup IngenShared
+ */
+class URIMap : public Raul::Noncopyable {
+public:
+	URIMap(LV2_URID_Map* map, LV2_URID_Unmap* unmap);
+	virtual ~URIMap() {}
+
+	uint32_t    map_uri(const char* uri);
+	const char* unmap_uri(uint32_t urid) const;
+
+	class Feature : public LV2Features::Feature {
+	public:
+		Feature(const char* URI, void* data) {
+			_feature.URI  = URI;
+			_feature.data = data;
+		}
+
+		SharedPtr<LV2_Feature> feature(World*, GraphObject*) {
+			return SharedPtr<LV2_Feature>(&_feature, NullDeleter<LV2_Feature>);
+		}
+
+	private:
+		LV2_Feature _feature;
+	};
+
+	struct URIDMapFeature : public Feature {
+		URIDMapFeature(URIMap* map, LV2_URID_Map* urid_map);
+		LV2_URID        map(const char* uri);
+		static LV2_URID default_map(LV2_URID_Map_Handle h, const char* uri);
+		LV2_URID_Map urid_map;
+	};
+
+	struct URIDUnmapFeature : public Feature {
+		URIDUnmapFeature(URIMap* map, LV2_URID_Unmap* urid_unmap);
+		const char*        unmap(const LV2_URID urid);
+		static const char* default_unmap(LV2_URID_Map_Handle h, LV2_URID uri);
+		LV2_URID_Unmap urid_unmap;
+	};
+
+	SharedPtr<URIDMapFeature>   urid_map_feature()   { return _urid_map_feature; }
+	SharedPtr<URIDUnmapFeature> urid_unmap_feature() { return _urid_unmap_feature; }
+
+private:
+	SharedPtr<URIDMapFeature>   _urid_map_feature;
+	SharedPtr<URIDUnmapFeature> _urid_unmap_feature;
+};
+
+} // namespace Ingen
+
+#endif // INGEN_URIMAP_HPP