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IStatisticsSvc.h

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/*
 *  IStatisticsSvc.h
 *
 *  Provides 'Event Store' like access to ROOT objects (hist, graph, tree, etc.)
 *  - Data can be shared between algorithms.
 *  - Data is not cleared each event loop, so it can be used to collect
 *    statistics, fill trees, etc.
 *  - Some suggested types:
 *     - Histograms: TH1F, TH2F, TH3F
 *     - Single numbers: TParameter<int>, TParameter<double>
 *     - Tables of data: TTree
 *     - Graphs: TGraph, TGraphErrors
 * 
 *  Created by Dan Dwyer on 2009/01/21
 */

#ifndef DATASVC_ISTATISTICSSVC_H
#define DATASVC_ISTATISTICSSVC_H

#include "GaudiKernel/IInterface.h"
#include <string>
#include <vector>

class TObject;
class TH1F;
class TH2F;
class TH3F;
class TTree;
class TGraph;

// Declaration of the interface ID
static const InterfaceID IID_IStatisticsSvc("IStatisticsSvc",1,0);

class IStatisticsSvc : virtual public IInterface
{
 public:
  // Retrieve interface ID
  static const InterfaceID& interfaceID(){
    return IID_IStatisticsSvc;
  }

  virtual StatusCode put(const std::string& path, TObject* object) = 0;
  virtual TObject* get(const std::string& path) = 0;
  virtual bool exists(const std::string& path) = 0;
  virtual std::vector<std::string> getContents(const std::string& path) = 0;
  virtual std::vector<std::string> getSubFolders(const std::string& path) = 0;

  
  virtual TH1F* getTH1F(const std::string& path) = 0;
  virtual TH2F* getTH2F(const std::string& path) = 0;
  virtual TH3F* getTH3F(const std::string& path) = 0;
  virtual TTree* getTree(const std::string& path) = 0;
  virtual TGraph* getGraph(const std::string& path) = 0;
};

#endif  // DATASVC_ISTATISTICSSVC_H

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