adding the three swapping functions to WellInterface

They should only be used to change the order related to the reservoir
variables, so they should be same for all the well models and should be
put in the WelInterface.

opm/autodiff/WellInterface.hpp

@@ -50,10 +50,14 @@ namespace Opm
     {
     public:
 
-        // TODO: Simulator will probably enter template parameter through TypeTag later
-        using Simulator = SimulatorFullyImplicitBlackoilEbos;
         using WellState = WellStateFullyImplicitBlackoilDense;
 
+        typedef typename GET_PROP_TYPE(TypeTag, Simulator) Simulator;
+        typedef typename GET_PROP_TYPE(TypeTag, FluidSystem) FluidSystem;
+        typedef typename GET_PROP_TYPE(TypeTag, Indices) BlackoilIndices;
+
+        static const int solventCompIdx = 3; //TODO get this from ebos
+
         /// Constructor
         WellInterface(const Well* well, const int time_step, const Wells* wells);
 
@@ -117,6 +121,12 @@ namespace Opm
 
         const PhaseUsage& phaseUsage() const;
 
+        int flowPhaseToEbosCompIdx( const int phaseIdx ) const;
+
+        int flowToEbosPvIdx( const int flowPv ) const;
+
+        int flowPhaseToEbosPhaseIdx( const int phaseIdx ) const;
+
     protected:
         // well name
         std::string name_;

opm/autodiff/WellInterface_impl.hpp

@@ -252,4 +252,48 @@ namespace Opm
     }
 
 
+
+
+
+    template<typename TypeTag>
+    int
+    WellInterface<TypeTag>::
+    flowPhaseToEbosCompIdx( const int phaseIdx ) const
+    {
+        const int phaseToComp[ 4 ] = { FluidSystem::waterCompIdx, FluidSystem::oilCompIdx, FluidSystem::gasCompIdx, solventCompIdx };
+        return phaseToComp[ phaseIdx ];
+    }
+
+
+
+
+
+    template<typename TypeTag>
+    int
+    WellInterface<TypeTag>::
+    flowToEbosPvIdx( const int flowPv ) const
+    {
+        const int flowToEbos[ 4 ] = {
+                                     BlackoilIndices::pressureSwitchIdx,
+                                     BlackoilIndices::waterSaturationIdx,
+                                     BlackoilIndices::compositionSwitchIdx,
+                                     BlackoilIndices::solventSaturationIdx
+                                    };
+        return flowToEbos[ flowPv ];
+    }
+
+
+
+
+
+    template<typename TypeTag>
+    int
+    WellInterface<TypeTag>::
+    flowPhaseToEbosPhaseIdx( const int phaseIdx ) const
+    {
+        assert(phaseIdx < 3);
+        const int flowToEbos[ 3 ] = { FluidSystem::waterPhaseIdx, FluidSystem::oilPhaseIdx, FluidSystem::gasPhaseIdx };
+        return flowToEbos[ phaseIdx ];
+    }
+
 }