re-add dumux/common/boundaryconditions.hh

'cause the decoupled stuff uses it

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@4571 2fb0f335-1f38-0410-981e-8018bf24f1b0

dumux/common/boundaryconditions.hh

+// $Id$
+/*****************************************************************************
+ *   Copyright (C) 2009-2010 by Bernd Flemisch                               *
+ *   Institute of Hydraulic Engineering                                      *
+ *   University of Stuttgart, Germany                                        *
+ *   email: <givenname>.<name>@iws.uni-stuttgart.de                          *
+ *                                                                           *
+ *   This program 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, as long as this copyright notice    *
+ *   is included in its original form.                                       *
+ *                                                                           *
+ *   This program is distributed WITHOUT ANY WARRANTY.                       *
+ *****************************************************************************/
+#ifndef DUMUX_BOUNDARYCONDITIONS_HH
+#define DUMUX_BOUNDARYCONDITIONS_HH
+
+/**
+* @file
+* @brief  Definition of boundary condition types, extend if necessary
+* @author Peter Bastian
+*/
+namespace Dumux
+{
+/** @addtogroup DISC_Operators
+*
+* @{
+*/
+/**
+* @brief Define a class containing boundary condition flags
+*
+*/
+
+//! base Class that defines boundary condition flags
+struct BoundaryConditions
+{
+    /** \brief These values are ordered according to precedence */
+    enum Flags {
+        couplingOutflow = -2, //!< An outflow boundary for coupled models
+        couplingInflow = -1, //!< An inflow boundary for coupled models
+        outflow = 0, //!< An outflow boundary
+        neumann = 1, //!< Neumann boundary
+        process = 2, //!< Processor boundary
+        dirichlet = 3 //!< Dirichlet boundary
+    };
+};
+
+/** @} */
+}
+#endif