OmniClusterRef.h

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#ifndef TrackerRecHit2D_OmniClusterRef_H
#define TrackerRecHit2D_OmniClusterRef_H

#include "DataFormats/Common/interface/RefCoreWithIndex.h"

#include "DataFormats/SiStripCluster/interface/SiStripCluster.h"
#include "DataFormats/SiPixelCluster/interface/SiPixelCluster.h"
#include "DataFormats/Common/interface/DetSetVectorNew.h"

class OmniClusterRef {

  static const unsigned int kInvalid = 0x80000000; // bit 31 on
  static const unsigned int kIsStrip = 0x20000000; // bit 29 on
  static const unsigned int kIsRegional = 0x60000000; // bit 30 and 29 on  (will become fastsim???)

  static const unsigned int indexMask = 0xFFFFFF;
  static const unsigned int subClusMask = 0xF000000;
  static const unsigned int subClusShift = 24;

public:
  typedef edm::Ref<edmNew::DetSetVector<SiPixelCluster>,SiPixelCluster > ClusterPixelRef;
  typedef edm::Ref<edmNew::DetSetVector<SiStripCluster>,SiStripCluster > ClusterStripRef;
  
  OmniClusterRef() : me(edm::RefCore(),kInvalid) {}
  explicit OmniClusterRef(ClusterPixelRef const & ref, unsigned int subClus=0) : me(ref.refCore(), (ref.isNonnull() ? ref.key()               | (subClus<<subClusShift)   : kInvalid) ){  }
  explicit OmniClusterRef(ClusterStripRef const & ref, unsigned int subClus=0) : me(ref.refCore(), (ref.isNonnull() ? (ref.key() | kIsStrip ) | (subClus<<subClusShift) : kInvalid) ){ }
  
  ClusterPixelRef cluster_pixel()  const { 
    return (isPixel() && isValid()) ?  ClusterPixelRef(me.toRefCore(),index()) : ClusterPixelRef();
  }

  ClusterStripRef cluster_strip()  const { 
    return isStrip() ? ClusterStripRef(me.toRefCore(),index()) : ClusterStripRef();
  }
  
  SiPixelCluster const & pixelCluster() const {
    return *ClusterPixelRef(me.toRefCore(),index());
  }
  SiStripCluster const & stripCluster() const {
    return *ClusterStripRef(me.toRefCore(),index());
  }
  
  bool operator==(OmniClusterRef const & lh) const { 
    return rawIndex() == lh.rawIndex(); // in principle this is enough!
  }

  bool operator<(OmniClusterRef const & lh) const { 
    return rawIndex() < lh.rawIndex(); // in principle this is enough!
  }
  
public:
  // edm Ref interface
  /* auto */ edm::ProductID id() const { return me.id();}
  unsigned int key() const { return index();}


  unsigned int rawIndex() const { return me.index();}
  
  unsigned int index() const { return rawIndex() & indexMask;}
  
  unsigned int subCluster() const { return (rawIndex() & subClusMask)>>subClusShift; }

  bool isValid() const { return !(rawIndex() & kInvalid); }
  bool isPixel() const { return !isStrip(); } //NOTE: non-valid will also show up as a pixel
  bool isStrip() const { return rawIndex() & kIsStrip; }
  // bool isRegional() const { return (rawIndex() & kIsRegional)==kIsRegional; }
  // bool isNonRegionalStrip() const {return (rawIndex() & kIsRegional)==kIsStrip;}

private:
  edm::RefCoreWithIndex me;
};

#endif // TrackerRecHit2D_OmniClusterRef_H