Use HcalTopology mode as defined in SLHC releases.

Geometry/HcalTowerAlgo/src/HcalParametersFromDD.cc

@@ -1,12 +1,37 @@
 #include "Geometry/HcalTowerAlgo/interface/HcalParametersFromDD.h"
+#include "Geometry/CaloTopology/interface/HcalTopologyMode.h"
 #include "CondFormats/GeometryObjects/interface/PHcalParameters.h"
 #include "DetectorDescription/Core/interface/DDCompactView.h"
+#include "DetectorDescription/Core/interface/DDFilteredView.h"
 #include "DetectorDescription/Core/interface/DDVectorGetter.h"
 #include "DetectorDescription/Base/interface/DDutils.h"
 
+namespace
+{
+  double getTopologyMode( const char* s, const DDsvalues_type & sv )
+  {
+    DDValue val( s );
+    if( DDfetch( &sv, val ))
+    {
+      const std::vector<std::string> & fvec = val.strings();
+      if( fvec.size() == 0 )
+      {
+	throw cms::Exception( "HcalParametersFromDD" ) << "Failed to get " << s << " tag.";
+      }
+
+      StringToEnumParser<HcalTopologyMode::Mode> eparser;
+      HcalTopologyMode::Mode mode = (HcalTopologyMode::Mode) eparser.parseString( fvec[0] );
+
+      return double( mode );
+    }
+    else
+      throw cms::Exception( "HcalParametersFromDD" ) << "Failed to get "<< s << " tag.";
+  }
+}
+
 bool
-HcalParametersFromDD::build( const DDCompactView* cvp,
-			     PHcalParameters& php)
+HcalParametersFromDD::build( const DDCompactView* cpv,
+			     PHcalParameters& php )
 {
   php.phioff = DDVectorGetter::get( "phioff" );
   php.etaTable = DDVectorGetter::get( "etaTable" );
@@ -45,8 +70,27 @@ HcalParametersFromDD::build( const DDCompactView* cvp,
     }
   }
 
-  int topologyMode = 0;
-  php.topologyMode = topologyMode;
+  // FIXME: HcalTopology mode can be defined as double.
+  //        This is for consistency with SLHC releases.
+  //
+  std::string attribute = "OnlyForHcalRecNumbering"; 
+  std::string value     = "any";
+  DDValue val( attribute, value, 0.0 );
+
+  DDSpecificsFilter filter;
+  filter.setCriteria( val, DDSpecificsFilter::not_equals,
+		      DDSpecificsFilter::AND, true, // compare strings 
+		      true  // use merged-specifics or simple-specifics
+		     );
+  DDFilteredView fv( *cpv );
+  fv.addFilter( filter );
+  bool ok = fv.firstChild();
+
+  if( !ok ) throw cms::Exception( "HcalParametersFromDD" ) << "Not found "<< attribute.c_str() << " but needed.";
+
+  DDsvalues_type sv( fv.mergedSpecifics());
+
+  php.topologyMode = getTopologyMode( "TopologyMode", sv );
 
   return true;
 }