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#ifndef MatchByDEta_h_
#define MatchByDEta_h_
/** Define match between two objects by deltaEta.
*/
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include <cmath>
namespace reco {
template <typename T1, typename T2>
class MatchByDEta {
public:
MatchByDEta(const edm::ParameterSet& cfg) : maxDEta_(cfg.getParameter<double>("maxDeltaEta")) {}
bool operator()(const T1& t1, const T2& t2) const { return std::abs(t1.eta() - t2.eta()) < maxDEta_; }
private:
double maxDEta_;
};
} // namespace reco
#endif
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