HcalObjects/interface/HcalLinearCompositionFunctor.h

0001 #ifndef CondFormats_HcalObjects_HcalLinearCompositionFunctor_h
0002 #define CondFormats_HcalObjects_HcalLinearCompositionFunctor_h
0003
0004 #include "FWCore/Utilities/interface/Exception.h"
0005
0006 #include "CondFormats/HcalObjects/interface/AbsHcalFunctor.h"
0007
0008 #include "boost/serialization/access.hpp"
0009 #include "boost/serialization/version.hpp"
0010 #include "boost/serialization/shared_ptr.hpp"
0011
0012 //
0013 // A functor returning a linearly transformed value
0014 // of another functor: f(x) = a*p(x) + b. Useful for
0015 // implementing cuts symmetric about 0, etc.
0016 //
0017 class HcalLinearCompositionFunctor : public AbsHcalFunctor {
0018 public:
0019   // Dummy constructor, to be used for deserialization only
0020   inline HcalLinearCompositionFunctor() : a_(0.0), b_(0.0) {}
0021
0022   // Normal constructor
0023   HcalLinearCompositionFunctor(std::shared_ptr<AbsHcalFunctor> p, double a, double b);
0024
0025   inline ~HcalLinearCompositionFunctor() override {}
0026
0027   double operator()(double x) const override;
0028
0029   inline double xmin() const override { return other_->xmin(); }
0030   inline double xmax() const override { return other_->xmax(); }
0031
0032   inline double a() const { return a_; }
0033   inline double b() const { return b_; }
0034
0035 protected:
0036   inline bool isEqual(const AbsHcalFunctor& other) const override {
0037     const HcalLinearCompositionFunctor& r = static_cast<const HcalLinearCompositionFunctor&>(other);
0038     return *other_ == *r.other_ && a_ == r.a_ && b_ == r.b_;
0039   }
0040
0041 private:
0042   std::shared_ptr<AbsHcalFunctor> other_;
0043   double a_;
0044   double b_;
0045
0046   friend class boost::serialization::access;
0047
0048   template <class Archive>
0049   inline void serialize(Archive& ar, unsigned /* version */) {
0050     boost::serialization::base_object<AbsHcalFunctor>(*this);
0051     // Direct polymorphic serialization of shared_ptr is broken
0052     // in boost for versions 1.56, 1.57, 1.58. For detail, see
0053     // https://svn.boost.org/trac/boost/ticket/10727
0054 #if BOOST_VERSION < 105600 || BOOST_VERSION > 105800
0055     ar& other_& a_& b_;
0056 #else
0057     throw cms::Exception(
0058         "HcalLinearCompositionFunctor can not be"
0059         " serialized with this version of boost");
0060 #endif
0061   }
0062 };
0063
0064 BOOST_CLASS_VERSION(HcalLinearCompositionFunctor, 1)
0065 BOOST_CLASS_EXPORT_KEY(HcalLinearCompositionFunctor)
0066
0067 #endif  // CondFormats_HcalObjects_HcalLinearCompositionFunctor_h