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0001 //
0002 //
0003 
0004 #ifndef PhysicsTools_PatAlgos_PATUserDataMerger_h
0005 #define PhysicsTools_PatAlgos_PATUserDataMerger_h
0006 
0007 /**
0008   \class    pat::PATUserDataMerger PATUserDataMerger.h "PhysicsTools/PatAlgos/interface/PATUserDataMerger.h"
0009   \brief    Assimilates pat::UserData into pat objects
0010 
0011             This expects one input:
0012         src:               The data to add to the objects that get passed to this
0013                            object, which are ValueMaps to some type (like UserData or double).
0014 
0015         This will be called from PATUserDataHelper to handle the templated cases
0016         like UserData or double. PATUserDataHelper will then add all the instantiated
0017         cases.
0018 
0019   \author   Salvatore Rappoccio
0020   \version  $Id: PATUserDataMerger.h,v 1.10 2011/10/26 17:01:25 vadler Exp $
0021 */
0022 
0023 #include "FWCore/Framework/interface/Event.h"
0024 #include "FWCore/Framework/interface/ConsumesCollector.h"
0025 #include "FWCore/ParameterSet/interface/ParameterSet.h"
0026 #include "FWCore/Utilities/interface/InputTag.h"
0027 #include "FWCore/Utilities/interface/transform.h"
0028 #include "DataFormats/Common/interface/View.h"
0029 #include "DataFormats/Common/interface/Ptr.h"
0030 #include "DataFormats/Common/interface/Association.h"
0031 #include "DataFormats/Candidate/interface/CandidateFwd.h"
0032 #include "DataFormats/Candidate/interface/Candidate.h"
0033 #include "DataFormats/PatCandidates/interface/PATObject.h"
0034 
0035 #include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
0036 #include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
0037 
0038 #include <iostream>
0039 
0040 namespace pat {
0041   namespace helper {
0042     struct AddUserInt {
0043       typedef int value_type;
0044       typedef edm::ValueMap<value_type> product_type;
0045       template <typename ObjectType>
0046       void addData(ObjectType &obj, const std::string &key, const value_type &val) {
0047         obj.addUserInt(key, val);
0048       }
0049     };
0050     struct AddUserFloat {
0051       typedef float value_type;
0052       typedef edm::ValueMap<value_type> product_type;
0053       template <typename ObjectType>
0054       void addData(ObjectType &obj, const std::string &key, const value_type &val) {
0055         obj.addUserFloat(key, val);
0056       }
0057     };
0058     struct AddUserPtr {
0059       typedef edm::Ptr<UserData> value_type;
0060       typedef edm::ValueMap<value_type> product_type;
0061       template <typename ObjectType>
0062       void addData(ObjectType &obj, const std::string &key, const value_type &val) {
0063         obj.addUserDataFromPtr(key, val);
0064       }
0065     };
0066     struct AddUserCand {
0067       typedef reco::CandidatePtr value_type;
0068       typedef edm::ValueMap<value_type> product_type;
0069       template <typename ObjectType>
0070       void addData(ObjectType &obj, const std::string &key, const value_type &val) {
0071         obj.addUserCand(key, val);
0072       }
0073     };
0074 
0075   }  // namespace helper
0076 
0077   template <typename ObjectType, typename Operation>
0078   class PATUserDataMerger {
0079   public:
0080     PATUserDataMerger() {}
0081     PATUserDataMerger(const edm::ParameterSet &iConfig, edm::ConsumesCollector &iC);
0082     ~PATUserDataMerger() {}
0083 
0084     static void fillDescription(edm::ParameterSetDescription &iDesc);
0085 
0086     // Method to call from PATUserDataHelper to add information to the PATObject in question.
0087     void add(ObjectType &patObject, edm::Event const &iEvent, edm::EventSetup const &iSetup);
0088 
0089   private:
0090     // configurables
0091     std::vector<edm::InputTag> userDataSrc_;
0092     std::vector<edm::EDGetTokenT<typename Operation::product_type>> userDataSrcTokens_;
0093     std::vector<std::string> labelPostfixesToStrip_, labels_;
0094     Operation loader_;
0095   };
0096 
0097 }  // namespace pat
0098 
0099 // Constructor: Initilize user data src
0100 template <typename ObjectType, typename Operation>
0101 pat::PATUserDataMerger<ObjectType, Operation>::PATUserDataMerger(const edm::ParameterSet &iConfig,
0102                                                                  edm::ConsumesCollector &iC)
0103     : userDataSrc_(iConfig.getParameter<std::vector<edm::InputTag>>("src")),
0104       labelPostfixesToStrip_(iConfig.existsAs<std::vector<std::string>>("labelPostfixesToStrip")
0105                                  ? iConfig.getParameter<std::vector<std::string>>("labelPostfixesToStrip")
0106                                  : std::vector<std::string>()) {
0107   for (std::vector<edm::InputTag>::const_iterator input_it = userDataSrc_.begin(); input_it != userDataSrc_.end();
0108        ++input_it) {
0109     userDataSrcTokens_.push_back(iC.consumes<typename Operation::product_type>(*input_it));
0110   }
0111   for (edm::InputTag tag : userDataSrc_) {  // copy by value
0112     for (const std::string &stripme : labelPostfixesToStrip_) {
0113       auto match = tag.label().rfind(stripme);
0114       if (match == (tag.label().length() - stripme.length())) {
0115         tag = edm::InputTag(tag.label().substr(0, match), tag.instance(), tag.process());
0116       }
0117     }
0118     labels_.push_back(tag.encode());
0119   }
0120 }
0121 
0122 /* ==================================================================================
0123      PATUserDataMerger::add
0124             This expects four inputs:
0125             patObject:         ObjectType to add to
0126 
0127         from Event:
0128         userDataSrc:       The data to add, which is a ValueMap keyed by recoObject
0129 
0130         from Setup:
0131         none currently
0132 
0133         This will simply add the UserData *'s from the value map that are
0134         indexed by the reco objects, to the pat object's user data vector.
0135    ==================================================================================
0136 */
0137 
0138 template <class ObjectType, typename Operation>
0139 void pat::PATUserDataMerger<ObjectType, Operation>::add(ObjectType &patObject,
0140                                                         edm::Event const &iEvent,
0141                                                         const edm::EventSetup &iSetup) {
0142   typename std::vector<edm::EDGetTokenT<typename Operation::product_type>>::const_iterator
0143       token_begin = userDataSrcTokens_.begin(),
0144       token_it = userDataSrcTokens_.begin(), token_end = userDataSrcTokens_.end();
0145 
0146   for (; token_it != token_end; ++token_it) {
0147     const std::string &encoded = (labels_.at(token_it - token_begin));
0148 
0149     // Declare the object handles:
0150     // ValueMap containing the values, or edm::Ptr's to the UserData that
0151     //   is associated to those PAT Objects
0152     edm::Handle<typename Operation::product_type> userData;
0153 
0154     // Get the objects by label
0155     if (encoded.empty())
0156       continue;
0157     iEvent.getByToken(*token_it, userData);
0158 
0159     edm::Ptr<reco::Candidate> recoObject = patObject.originalObjectRef();
0160     loader_.addData(patObject, encoded, (*userData)[recoObject]);
0161   }
0162 }
0163 
0164 template <class ObjectType, typename Operation>
0165 void pat::PATUserDataMerger<ObjectType, Operation>::fillDescription(edm::ParameterSetDescription &iDesc) {
0166   iDesc.add<std::vector<edm::InputTag>>("src");
0167   iDesc.addOptional<std::vector<std::string>>("labelPostfixesToStrip", std::vector<std::string>());
0168 }
0169 
0170 #endif