File indexing completed on 2024-04-06 12:01:16
0001 #ifndef UtilAlgos_Merger_h
0002 #define UtilAlgos_Merger_h
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0020 #include "FWCore/Framework/interface/global/EDProducer.h"
0021 #include "FWCore/Framework/interface/Event.h"
0022 #include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
0023 #include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
0024 #include "FWCore/ParameterSet/interface/ParameterSet.h"
0025 #include "FWCore/Utilities/interface/transform.h"
0026 #include "FWCore/Utilities/interface/InputTag.h"
0027 #include "DataFormats/Common/interface/CloneTrait.h"
0028 #include <vector>
0029
0030 template <typename InputCollection,
0031 typename OutputCollection = InputCollection,
0032 typename P = typename edm::clonehelper::CloneTrait<InputCollection>::type>
0033 class Merger : public edm::global::EDProducer<> {
0034 public:
0035
0036 explicit Merger(const edm::ParameterSet&);
0037
0038 ~Merger() override;
0039 static void fillDescriptions(edm::ConfigurationDescriptions& descriptions);
0040
0041 private:
0042
0043 void produce(edm::StreamID, edm::Event&, const edm::EventSetup&) const override;
0044
0045 typedef std::vector<edm::EDGetTokenT<InputCollection>> vtoken;
0046
0047 vtoken srcToken_;
0048 };
0049
0050 template <typename InputCollection, typename OutputCollection, typename P>
0051 Merger<InputCollection, OutputCollection, P>::Merger(const edm::ParameterSet& par)
0052 : srcToken_(edm::vector_transform(par.template getParameter<std::vector<edm::InputTag>>("src"),
0053 [this](edm::InputTag const& tag) { return consumes<InputCollection>(tag); })) {
0054 produces<OutputCollection>();
0055 }
0056
0057 template <typename InputCollection, typename OutputCollection, typename P>
0058 Merger<InputCollection, OutputCollection, P>::~Merger() {}
0059
0060 template <typename InputCollection, typename OutputCollection, typename P>
0061 void Merger<InputCollection, OutputCollection, P>::produce(edm::StreamID,
0062 edm::Event& evt,
0063 const edm::EventSetup&) const {
0064 std::unique_ptr<OutputCollection> coll(new OutputCollection);
0065 for (typename vtoken::const_iterator s = srcToken_.begin(); s != srcToken_.end(); ++s) {
0066 edm::Handle<InputCollection> h;
0067 evt.getByToken(*s, h);
0068 for (typename InputCollection::const_iterator c = h->begin(); c != h->end(); ++c) {
0069 coll->push_back(P::clone(*c));
0070 }
0071 }
0072 evt.put(std::move(coll));
0073 }
0074
0075 template <typename InputCollection, typename OutputCollection, typename P>
0076 void Merger<InputCollection, OutputCollection, P>::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
0077 edm::ParameterSetDescription desc;
0078 desc.add<std::vector<edm::InputTag>>("src",
0079 {
0080 edm::InputTag("collection1"),
0081 edm::InputTag("collection2"),
0082 });
0083 descriptions.addWithDefaultLabel(desc);
0084 }
0085
0086 #endif