Framework/interface/ESRecordsToProductResolverIndices.h

0001 // -*- C++ -*-
0002 #ifndef FWCore_Framework_ESRecordsToProductResolverIndices_h
0003 #define FWCore_Framework_ESRecordsToProductResolverIndices_h
0004 //
0005 // Package:     Framework
0006 // Class  :     ESRecordsToProductResolverIndices
0007 //
0008 /**\class edm::eventsetup::ESRecordsToProductResolverIndices
0009
0010  Description: Key used to identify data within a EventSetupRecord
0011
0012  Usage:
0013     <usage>
0014
0015 */
0016 //
0017 // Author:      Chris Jones
0018 // Created:     Tues Feb 12 14:31:03 EST 2019
0019 //
0020
0021 // system include files
0022 #include <vector>
0023
0024 // user include files
0025 #include "FWCore/Framework/interface/DataKey.h"
0026 #include "FWCore/Framework/interface/EventSetupRecordKey.h"
0027 #include "FWCore/Framework/interface/ESTagGetter.h"
0028 #include "FWCore/Utilities/interface/ESIndices.h"
0029
0030 // forward declarations
0031 namespace edm::eventsetup {
0032   struct ComponentDescription;
0033
0034   class ESRecordsToProductResolverIndices {
0035   public:
0036     ESRecordsToProductResolverIndices(std::vector<EventSetupRecordKey> iRecords);
0037
0038     // ---------- const member functions ---------------------
0039     ///If the index is not found, returns ESResolverIndex::noResolverConfigured()
0040     ESResolverIndex indexInRecord(EventSetupRecordKey const& iRK, DataKey const& iDK) const noexcept;
0041
0042     ComponentDescription const* component(EventSetupRecordKey const& iRK, DataKey const& iDK) const noexcept;
0043
0044     ///Returns ESTagGetter for all products matching the type iTT for record iRK
0045     ESTagGetter makeTagGetter(EventSetupRecordKey const& iRK, TypeTag const& iTT) const;
0046
0047     static constexpr ESRecordIndex missingRecordIndex() noexcept {
0048       return ESRecordIndex{ESRecordIndex::invalidValue()};
0049     }
0050
0051     ESRecordIndex recordIndexFor(EventSetupRecordKey const& iRK) const noexcept;
0052
0053     std::pair<std::vector<DataKey>::const_iterator, std::vector<DataKey>::const_iterator> keysForRecord(
0054         EventSetupRecordKey const& iRK) const noexcept;
0055     ///The sorted list of keys
0056     std::vector<EventSetupRecordKey> recordKeys() const noexcept { return recordKeys_; }
0057
0058     // ---------- member functions ---------------------------
0059     ///This should be called for all records in the list passed to the constructor and
0060     /// in the same order as the list.
0061     unsigned int dataKeysInRecord(unsigned int iRecordIndex,
0062                                   EventSetupRecordKey const& iRecord,
0063                                   std::vector<DataKey> const& iDataKeys,
0064                                   std::vector<ComponentDescription const*> const& iComponents);
0065
0066   private:
0067     // ---------- member data --------------------------------
0068     std::vector<EventSetupRecordKey> recordKeys_;
0069     //for each item in recordKeys_ this holds the index to the first
0070     // DataKey for that item in dataKeys_
0071     // recordOffset_ is 1 size larger than recordKeys_ with the
0072     // last entry being dataKeys_.size()
0073     std::vector<unsigned int> recordOffsets_;
0074     std::vector<DataKey> dataKeys_;
0075     std::vector<ComponentDescription const*> components_;
0076   };
0077
0078 }  // namespace edm::eventsetup
0079 #endif