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diff --git a/ingen/shared/ResourceImpl.hpp b/ingen/shared/ResourceImpl.hpp
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+/* This file is part of Ingen.
+ * Copyright 2008-2011 David Robillard <http://drobilla.net>
+ *
+ * Ingen is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) 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 General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef INGEN_SHARED_RESOURCEIMPL_HPP
+#define INGEN_SHARED_RESOURCEIMPL_HPP
+
+#include "ingen/Resource.hpp"
+#include "ingen/shared/URIs.hpp"
+#include "raul/SharedPtr.hpp"
+#include "raul/URI.hpp"
+
+namespace Ingen {
+namespace Shared {
+
+class URIs;
+
+class ResourceImpl : virtual public Resource
+{
+public:
+	ResourceImpl(URIs& uris, const Raul::URI& uri)
+		: _uris(uris)
+		, _uri(uri)
+	{}
+
+	URIs& uris() const { return _uris; }
+
+	virtual void             set_uri(const Raul::URI& uri) { _uri = uri; }
+	virtual const Raul::URI& uri()  const { return _uri; }
+
+	const Properties& properties() const { return _properties; }
+	Properties&       properties()       { return _properties; }
+
+	Properties properties(Resource::Graph ctx) const;
+
+	const Raul::Atom& get_property(const Raul::URI& uri) const;
+
+	const Raul::Atom& set_property(const Raul::URI&  uri,
+	                               const Raul::Atom& value,
+	                               Resource::Graph   ctx=Resource::DEFAULT);
+
+	/** Hook called whenever a property is added.
+	 * This can be used by derived classes to implement special behaviour for
+	 * particular properties (e.g. ingen:value for ports).
+	 */
+	virtual void on_property(const Raul::URI& uri, const Raul::Atom& value) {}
+
+	void remove_property(const Raul::URI& uri, const Raul::Atom& value);
+	bool has_property(const Raul::URI& uri, const Raul::Atom& value) const;
+	void add_property(const Raul::URI&  uri,
+	                  const Raul::Atom& value,
+	                  Graph             ctx = DEFAULT);
+	void set_properties(const Properties& p);
+	void add_properties(const Properties& p);
+	void remove_properties(const Properties& p);
+
+	void dump(std::ostream& os) const;
+
+	/** Get the ingen type from a set of Properties.
+	 * If some coherent ingen type is found, true is returned and the appropriate
+	 * output parameter set to true.  Otherwise false is returned.
+	 */
+	static bool type(const URIs&       uris,
+	                 const Properties& properties,
+	                 bool&             patch,
+	                 bool&             node,
+	                 bool&             port,
+	                 bool&             is_output);
+
+protected:
+	const Raul::Atom& set_property(const Raul::URI& uri, const Raul::Atom& value) const;
+
+	URIs& _uris;
+
+private:
+	Raul::URI          _uri;
+	mutable Properties _properties;
+};
+
+} // namespace Shared
+} // namespace Ingen
+
+#endif // INGEN_SHARED_RESOURCEIMPL_HPP
+