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Transformer.hh
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30 
31 #ifndef __FASTJET_TRANSFORMER_HH__
32 #define __FASTJET_TRANSFORMER_HH__
33 
34 #include <fastjet/PseudoJet.hh>
35 #include <fastjet/FunctionOfPseudoJet.hh>
36 #include <fastjet/PseudoJetStructureBase.hh>
37 
38 FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
39 
40 // forward declarations of what we will have down here
41 class Transformer;
42 
43 /// @ingroup tools_generic
44 /// \class Transformer
45 ///
46 /// Base (abstract) class for a jet transformer.
47 ///
48 /// A transformer, when it acts on a jet, returns a modified version
49 /// of that jet, one that may have a different momentum and/or
50 /// different internal structure.
51 ///
52 /// The typical usage of a class derived from Transformer is
53 /// \code
54 /// SomeTransformer transformer(...);
55 /// PseudoJet transformed_jet = transformer(original_jet);
56 /// // or
57 /// vector<PseudoJet> transformed_jets = transformer(original_jets);
58 /// \endcode
59 ///
60 /// For many transformers, the transformed jets have
61 /// transformer-specific information that can be accessed through the
62 ///
63 /// \code
64 /// transformed_jet.structure_of<SomeTransformer>().transformer_specific_info();
65 /// \endcode
66 ///
67 /// See the description of the Filter class for a more detailed usage
68 /// example. See the FastJet manual to find out how to implement
69 /// new transformers.
70 ///
71 class Transformer : public FunctionOfPseudoJet<PseudoJet>{
72 public:
73  /// default ctor
75 
76  /// default dtor
77  virtual ~Transformer(){}
78 
79  /// the result of the Transformer acting on the PseudoJet.
80  /// this _has_ to be overloaded in derived classes
81  /// \param original the PseudoJet input to the Transformer
82  virtual PseudoJet result(const PseudoJet & original) const = 0;
83 
84  /// This should be overloaded to return a description of the
85  /// Transformer
86  virtual std::string description() const = 0;
87 
88  /// A typedef that is needed to ensure that the
89  /// PseudoJet::structure_of() template function works
90  //
91  // Make sure you reimplement this appropriately in any
92  // derived classes
94 };
95 
96 FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh
97 
98 #endif // __FASTJET_TRANSFORMER_HH__
PseudoJetStructureBase StructureType
A typedef that is needed to ensure that the PseudoJet::structure_of() template function works...
Definition: Transformer.hh:93
Base (abstract) class for a jet transformer.
Definition: Transformer.hh:71
Contains any information related to the clustering that should be directly accessible to PseudoJet...
virtual ~Transformer()
default dtor
Definition: Transformer.hh:77
base class providing interface for a generic function of a PseudoJet
Transformer()
default ctor
Definition: Transformer.hh:74
Class to contain pseudojets, including minimal information of use to jet-clustering routines...
Definition: PseudoJet.hh:67