ProductRegistry.h

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#ifndef DataFormats_Provenance_ProductRegistry_h
#define DataFormats_Provenance_ProductRegistry_h
 
#include "DataFormats/Provenance/interface/BranchDescription.h"
#include "DataFormats/Provenance/interface/BranchKey.h"
#include "DataFormats/Provenance/interface/BranchListIndex.h"
#include "DataFormats/Provenance/interface/BranchType.h"
#include "FWCore/Utilities/interface/ProductKindOfType.h"
#include "FWCore/Utilities/interface/ProductResolverIndex.h"
#include "FWCore/Utilities/interface/get_underlying_safe.h"
 
#include <array>
#include <memory>
 
#include <iosfwd>
#include <map>
#include <set>
#include <string>
#include <string_view>
#include <tuple>
#include <utility>
#include <vector>
 
namespace edm {
 
  class ProductResolverIndexHelper;
  class TypeID;
  class TypeWithDict;
 
  class ProductRegistry {
  public:
    typedef std::map<BranchKey, BranchDescription> ProductList;
 
    ProductRegistry();
 
    // A constructor from the persistent data members from another product registry.
    // saves time by not copying the transient components.
    // The constructed registry will be frozen by default.
    explicit ProductRegistry(ProductList const& productList, bool toBeFrozen = true);
 
    virtual ~ProductRegistry() {}
 
    typedef std::map<BranchKey, BranchDescription const> ConstProductList;
 
    void addProduct(BranchDescription const& productdesc, bool iFromListener = false);
 
    void addLabelAlias(BranchDescription const& productdesc,
                       std::string const& labelAlias,
                       std::string const& instanceAlias);
 
    void copyProduct(BranchDescription const& productdesc);
 
    void setFrozen(bool initializeLookupInfo = true);
 
    void setFrozen(std::set<TypeID> const& productTypesConsumed,
                   std::set<TypeID> const& elementTypesConsumed,
                   std::string const& processName);
 
    void setUnscheduledProducts(std::set<std::string> const& unscheduledLabels);
 
    std::string merge(ProductRegistry const& other,
                      std::string const& fileName,
                      BranchDescription::MatchMode branchesMustMatch = BranchDescription::Permissive);
 
    void updateFromInput(ProductList const& other);
 
    void updateFromInput(std::vector<BranchDescription> const& other);
 
    ProductList const& productList() const {
      //throwIfNotFrozen();
      return productList_;
    }
 
    ProductList& productListUpdator() {
      throwIfFrozen();
      return productList_;
    }
 
    // Return all the branch names currently known to *this.  This
    // does a return-by-value of the vector so that it may be used in
    // a colon-initialization list.
    std::vector<std::string> allBranchNames() const;
 
    // Return pointers to (const) BranchDescriptions for all the
    // BranchDescriptions known to *this.  This does a
    // return-by-value of the vector so that it may be used in a
    // colon-initialization list.
    std::vector<BranchDescription const*> allBranchDescriptions() const;
 
    //NOTE: this is not const since we only want items that have non-const access to this class to be
    // able to call this internal iteration
    template <typename T>
    void callForEachBranch(T const& iFunc) {
      //NOTE: If implementation changes from a map, need to check that iterators are still valid
      // after an insert with the new container, else need to copy the container and iterate over the copy
      for (ProductRegistry::ProductList::const_iterator itEntry = productList_.begin(), itEntryEnd = productList_.end();
           itEntry != itEntryEnd;
           ++itEntry) {
        iFunc(itEntry->second);
      }
    }
    ProductList::size_type size() const { return productList_.size(); }
 
    void print(std::ostream& os) const;
 
    bool anyProducts(BranchType const brType) const;
 
    std::shared_ptr<ProductResolverIndexHelper const> productLookup(BranchType branchType) const;
    std::shared_ptr<ProductResolverIndexHelper> productLookup(BranchType branchType);
 
    // returns the appropriate ProductResolverIndex else ProductResolverIndexInvalid if no BranchID is available
    ProductResolverIndex indexFrom(BranchID const& iID) const;
 
    bool productProduced(BranchType branchType) const { return transient_.productProduced_[branchType]; }
    bool anyProductProduced() const { return transient_.anyProductProduced_; }
 
    // Looks if a (type, moduleLabel, productInstanceName) is an alias to some other branch
    //
    // Can return multiple modules if kindOfType is ELEMENT_TYPE (i.e.
    // the product is consumed via edm::View) and there is ambiguity
    // (in which case actual Event::get() would eventually lead to an
    // exception). In that case all possible modules whose product
    // could be consumed are returned.
    std::vector<std::string> aliasToModules(KindOfType kindOfType,
                                            TypeID const& type,
                                            std::string_view moduleLabel,
                                            std::string_view productInstanceName) const;
 
    ProductResolverIndex const& getNextIndexValue(BranchType branchType) const;
 
    void initializeTransients() { transient_.reset(); }
 
    bool frozen() const { return transient_.frozen_; }
 
    struct Transients {
      Transients();
      void reset();
 
      bool frozen_;
      // Is at least one (run), (lumi), (event) persistent product produced this process?
      std::array<bool, NumBranchTypes> productProduced_;
      bool anyProductProduced_;
 
      std::array<edm::propagate_const<std::shared_ptr<ProductResolverIndexHelper>>, NumBranchTypes> productLookups_;
 
      std::array<ProductResolverIndex, NumBranchTypes> nextIndexValues_;
 
      std::map<BranchID, ProductResolverIndex> branchIDToIndex_;
 
      enum { kKind, kType, kModuleLabel, kProductInstanceName, kAliasForModuleLabel };
      using AliasToOriginalVector = std::vector<std::tuple<KindOfType, TypeID, std::string, std::string, std::string>>;
      AliasToOriginalVector aliasToOriginal_;
    };
 
  private:
    void setProductProduced(BranchType branchType) {
      transient_.productProduced_[branchType] = true;
      transient_.anyProductProduced_ = true;
    }
 
    void freezeIt(bool frozen = true) { transient_.frozen_ = frozen; }
 
    void initializeLookupTables(std::set<TypeID> const* productTypesConsumed,
                                std::set<TypeID> const* elementTypesConsumed,
                                std::string const* processName);
    void addElementTypesForAliases(std::set<TypeID> const* elementTypesConsumed,
                                   std::map<TypeID, TypeID> const& containedTypeMap,
                                   std::map<TypeID, std::vector<TypeWithDict>> const& containedTypeToBaseTypesMap);
 
    void checkDictionariesOfConsumedTypes(std::set<TypeID> const* productTypesConsumed,
                                          std::set<TypeID> const* elementTypesConsumed,
                                          std::map<TypeID, TypeID> const& containedTypeMap,
                                          std::map<TypeID, std::vector<TypeWithDict>>& containedTypeToBaseTypesMap);
 
    void checkForDuplicateProcessName(BranchDescription const& desc, std::string const* processName) const;
 
    virtual void addCalled(BranchDescription const&, bool iFromListener);
    void throwIfNotFrozen() const;
    void throwIfFrozen() const;
 
    ProductResolverIndex& nextIndexValue(BranchType branchType);
 
    ProductList productList_;
    Transients transient_;
  };
 
  inline bool operator==(ProductRegistry const& a, ProductRegistry const& b) {
    return a.productList() == b.productList();
  }
 
  inline bool operator!=(ProductRegistry const& a, ProductRegistry const& b) { return !(a == b); }
 
  inline std::ostream& operator<<(std::ostream& os, ProductRegistry const& pr) {
    pr.print(os);
    return os;
  }
 
}  // namespace edm
 
#endif