JSingleton.hh

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#ifndef __JLANG__JSINGLETON__
#define __JLANG__JSINGLETON__

/**
 * \author mdejong
 */

namespace JLANG {}
namespace JPP { using namespace JLANG; }

namespace JLANG {

  
  /**
   * Simple singleton class.
   */
  template<class T>
  struct JSingleton {

    typedef T  data_type;

    /**
     * Get unique instance of template class.
     *
     * \return           object
     */
    static data_type& getInstance() 
    {
      static data_type value;

      return value;
    }

  protected:
    /**
     * Default constructor.
     */
    JSingleton()
    {}


    /**
     * Copy constructor.
     */
    JSingleton(const JSingleton&)
    {}

  private:
    JSingleton& operator=(const JSingleton&);
  };
}

#endif