MetaObject.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/

 
#ifndef SAMPLE_HANDLER_META_OBJECT_HH
#define SAMPLE_HANDLER_META_OBJECT_HH
 
#include <SampleHandler/Global.h>
#include <RootCoreUtils/Assert.h>
 
#include <string>
#include <TCollection.h>
 
namespace SH
{
  std::string dbg (const MetaObject& obj, unsigned verbosity = 0);
 

  void swap (MetaObject& a, MetaObject& b);
 
 

  class MetaObject : public TCollection
  {
    //
    // public interface
    //

  public:
    enum CastMode
    {
      CAST_ERROR_THROW,

      CAST_ERROR_DEFAULT,

      CAST_NOCAST_THROW,

      CAST_NOCAST_DEFAULT
    };
 
 

  public:
    void testInvariant () const;
 

  public:
    MetaObject ();
 

  public:
    MetaObject (const MetaObject& that);
 

  public:
    virtual ~MetaObject ();
 

  public:
    MetaObject& operator = (const MetaObject& that);
 

  public:
    void swap (MetaObject& that);
 

  public:
    void remove (const std::string& name);
 

  public:
    void addReplace (TNamed *meta_swallow);
 

  public:
    TObject *get (const std::string& name);
    const TObject *get (const std::string& name) const;
 

  public:
    [[deprecated("please use castDouble instead")]]
    double getDouble (const std::string& name, double def_val = 0) const;

  public:
    [[deprecated("please use castString instead")]]
    std::string getString (const std::string& name, const std::string& def_val = "") const;
 

  public:
    template<class T> T castT(const std::string& name, T def_val,
                  CastMode mode) const;
 

  public:
    double castDouble (const std::string& name, double def_val = 0,
               CastMode mode = CAST_ERROR_THROW) const;

  public:
    std::string castString (const std::string& name, const std::string& def_val = "",
                CastMode mode = CAST_ERROR_THROW) const;
 

  public:
    int castInteger (const std::string& name, int def_val = 0,
             CastMode mode = CAST_ERROR_THROW) const;
 

  public:
    bool castBool (const std::string& name, bool def_val = false,
           CastMode mode = CAST_ERROR_THROW) const;
    
  public:
    void setDouble (const std::string& name, double value);

  public:
    void setString (const std::string& name, const std::string& value);

  public:
    void setInteger (const std::string& name, int value);

  public:
    void setBool (const std::string& name, bool value);

  public:
    template<class T> void setT(const std::string& name, T value){
      RCU_CHANGE_INVARIANT (this);
      addReplace (new MetaData<T> (name, value));
    }

  public:
    void fetch (const MetaObject& source);
 

  public:
    void fetchDefaults (const MetaObject& source);
 

  public:
    void fetchFromString(const std::string& source);
 

  public:
    std::string dumpToString() const;
 
 
    //
    // method inherited from TCollection
    //

  public:
    virtual void Add (TObject *meta_swallow) override;
    virtual void Add (TObject *meta_swallow, Option_t*) override;
 

  public:
    virtual void Clear (Option_t *option = "") override;
 

  public:
    virtual void Delete (Option_t *option = "") override;
 

  public:
    virtual Int_t GetEntries () const override;
 

  public:
    virtual Int_t GetSize () const override;
 

  public:
    virtual TObject **GetObjectRef (const TObject *meta) const override;
 

  public:
    virtual TIterator *MakeIterator (Bool_t dir = kIterForward) const override;
 

  public:
    virtual TObject *Remove (TObject *meta) override;
 
    //
    // private interface
    //

  private:
    TList *m_dataList;
 
    ClassDefOverride(MetaObject, 1);
  };
}
 
#endif