Enum.h

#ifndef _Belle2_Enum_hh
#define _Belle2_Enum_hh
 
#include <string>
 
namespace Belle2 {
  class Enum {
 
  public:
    const static Enum UNKNOWN;
 
  public:
    ~Enum() {}
 
  protected:
    Enum(int id, const std::string& label)
      : m_id(id), m_label(label) {}
    Enum(const Enum& e) :
      m_id(e.m_id), m_label(e.m_label) {}
    Enum() : m_id(UNKNOWN.m_id),
      m_label(UNKNOWN.m_label) {}
 
  public:
    int getId() const { return m_id; }
    const char* getLabel() const { return m_label.c_str(); }
    const std::string& getLabelString() const { return m_label; }
 
  public:
    bool operator==(const Enum& e) const;
    bool operator!=(const Enum& e) const;
    const Enum& operator=(const Enum& e);
    bool operator==(const std::string& label) const;
    bool operator!=(const std::string& label) const;
 
  private:
    int m_id;
    std::string m_label;
 
  };
 
  inline bool Enum::operator==(const Enum& e) const
  {
    return (m_id == e.m_id);
  }
  inline bool Enum::operator!=(const Enum& e) const
  {
    return (m_id != e.m_id);
  }
  inline const Enum& Enum::operator=(const Enum& e)
  {
    m_id = e.m_id;
    m_label = e.m_label;
    return *this;
  }
  inline bool Enum::operator==(const std::string& label) const
  {
    return m_label == label;
  }
  inline bool Enum::operator!=(const std::string& label) const
  {
    return m_label != label;
  }
 
}
 
#endif