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#ifndef CondFormats_HcalObjects_HcalLinearCompositionFunctor_h
#define CondFormats_HcalObjects_HcalLinearCompositionFunctor_h
#include "FWCore/Utilities/interface/Exception.h"
#include "CondFormats/HcalObjects/interface/AbsHcalFunctor.h"
#include "boost/serialization/access.hpp"
#include "boost/serialization/version.hpp"
#include "boost/serialization/shared_ptr.hpp"
//
// A functor returning a linearly transformed value
// of another functor: f(x) = a*p(x) + b. Useful for
// implementing cuts symmetric about 0, etc.
//
class HcalLinearCompositionFunctor : public AbsHcalFunctor {
public:
// Dummy constructor, to be used for deserialization only
inline HcalLinearCompositionFunctor() : a_(0.0), b_(0.0) {}
// Normal constructor
HcalLinearCompositionFunctor(std::shared_ptr<AbsHcalFunctor> p, double a, double b);
inline ~HcalLinearCompositionFunctor() override {}
double operator()(double x) const override;
inline double xmin() const override { return other_->xmin(); }
inline double xmax() const override { return other_->xmax(); }
inline double a() const { return a_; }
inline double b() const { return b_; }
protected:
inline bool isEqual(const AbsHcalFunctor& other) const override {
const HcalLinearCompositionFunctor& r = static_cast<const HcalLinearCompositionFunctor&>(other);
return *other_ == *r.other_ && a_ == r.a_ && b_ == r.b_;
}
private:
std::shared_ptr<AbsHcalFunctor> other_;
double a_;
double b_;
friend class boost::serialization::access;
template <class Archive>
inline void serialize(Archive& ar, unsigned /* version */) {
boost::serialization::base_object<AbsHcalFunctor>(*this);
// Direct polymorphic serialization of shared_ptr is broken
// in boost for versions 1.56, 1.57, 1.58. For detail, see
// https://svn.boost.org/trac/boost/ticket/10727
#if BOOST_VERSION < 105600 || BOOST_VERSION > 105800
ar & other_ & a_ & b_;
#else
throw cms::Exception(
"HcalLinearCompositionFunctor can not be"
" serialized with this version of boost");
#endif
}
};
BOOST_CLASS_VERSION(HcalLinearCompositionFunctor, 1)
BOOST_CLASS_EXPORT_KEY(HcalLinearCompositionFunctor)
#endif // CondFormats_HcalObjects_HcalLinearCompositionFunctor_h
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