IdDictGroup.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef IDDICT_IdDictGroup_H
#define IDDICT_IdDictGroup_H
 
#include <string>
#include <vector>
#include <variant>
#include <utility>
#include <memory>
 
class IdDictDictEntry;
class IdDictRegion;
class IdDictMgr;
class IdDictDictionary;
class IdDictFieldImplementation;
class Identifier;
class ExpandedIdentifier;
class MultiRange;
 
 
 
class IdDictGroup{ 
public: 
    // ==================================
    //** @name Constructor/destructor
    // @{
 
    IdDictGroup (); 
    IdDictGroup (const std::string& name); 
    ~IdDictGroup (); 
 
 
    // ==================================
    //** @name Simple accessors.
    // @{
 
    const std::string&  name();
    const std::vector<IdDictDictEntry*>& entries();
    const std::vector<IdDictRegion*>&    regions();
 
 
    // ==================================
    //** @name Methods used to initialize the object.
    // @{
 
    MultiRange build_multirange () const; 
    void add_dictentry (IdDictDictEntry* entry);
 
    void resolve_references (const IdDictMgr& idd,  
                             IdDictDictionary& dictionary,
                             size_t& index);  
    void generate_implementation (const IdDictMgr& idd,  
                                  IdDictDictionary& dictionary, 
                                  const std::string& tag = "");
    void reset_implementation ();  
    bool verify () const;
    void sort   ();  
    void clear  (); 
 
 
    int unpack (const Identifier& id,
                const ExpandedIdentifier& prefix,
                size_t index2,
                ExpandedIdentifier& unpackedId,
                std::vector<const IdDictFieldImplementation*>* impls = nullptr) const;
 
    void build_region_tree();
 
 
    void dump() const;
 
 
    void dump_regions() const;
 
 
    void dump_tree() const;
 
 
private:
    void add_tree_field (const IdDictRegion& re, unsigned ifield, unsigned inode);
 
    std::string                   m_name;  
    std::vector<IdDictDictEntry*> m_entries;  // just the RegionEntries
    std::vector<IdDictRegion*>    m_regions;  // regions derived from entries
    bool m_generated_implementation;
 
 
    struct IdDictRegionTreeNode {
      IdDictRegionTreeNode (const IdDictFieldImplementation& impl);
      void optimize();
 
      const IdDictFieldImplementation& m_impl;
 
      std::unique_ptr<std::vector<const IdDictFieldImplementation*> > m_other_impls;
 
      using ChildPair = std::pair<size_t, unsigned>;
      std::variant<std::vector<unsigned>, ChildPair> m_children;
 
      // of an identifier.
      static constexpr unsigned END = static_cast<unsigned> (-1);
    };
    std::vector<IdDictRegionTreeNode> m_region_tree;
}; 
 
#endif