/*
 * RandomNumberDistribution.hpp
 *
 *  Created on: Jan 01, 2011
 *      Author: heber
 */

#ifndef RANDOMNUMBERDISTRIBUTION_HPP_
#define RANDOMNUMBERDISTRIBUTION_HPP_

// include config.h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string>

class RandomNumberDistributionFactoryTest;
class RandomNumberGenerator;
class RandomNumberDistribution_Parameters;

/** Abstract base class for a random number distribution.
 *
 *  This class represents the interface to the random number distribution.
 *  Hence, they all can be accessed the same way.
 *
 * It is also the base class that is needed for RandomNumberGeneratorFactory.
 */
class RandomNumberDistribution
{
  /**
   * test has to access cstor/dstor.
   */
  friend class RandomNumberDistributionFactoryTest;

  /**
   * RandomNumberGenerator(_Encapsulation) needs access to dstor.
   */
  friend class RandomNumberGenerator;

public:
  /** Getter for the whole set of possible parameters.
   *
   * @return filled instance of RandomNumberDistribution_Parameters
   */
  virtual RandomNumberDistribution_Parameters* getParameterSet() const=0;

  /** Getter for smallest value the uniform_... engines produces.
   *
   * @return smallest value
   */
  virtual double min() const=0;

  /** Getter for largest value the uniform_... engines produces.
   *
   * @return largest value
   */
  virtual double max() const=0;


  /** Getter for bernoulli_distribution probability p.
   *
   * @return p
   */
  virtual double p() const=0;

  /** Getter for binomial_distribution's parameter t.
   *
   * @return t
   */
  virtual double t() const=0;

  /** Getter for cauchy_distribution parameter median.
   *
   * @return median
   */
  virtual double median() const=0;

  /** Getter for cauchy_distribution parameter sigma.
   *
   * @return sigma
   */
  virtual double sigma() const=0;

  /** Getter for gamma_distribution parameter alpha.
   *
   * @return alpha
   */
  virtual double alpha() const=0;

  /** Getter for poisson_distribution's parameter mean.
   *
   * @return mean
   */
  virtual double mean() const=0;

  /** Getter for triangle_distribution parameter a.
   *
   * @return a
   */
  virtual double a() const=0;

  /** Getter for triangle_distribution parameter b.
   *
   * @return b
   */
  virtual double b() const=0;

  /** Getter for triangle_distribution parameter c.
   *
   * @return c
   */
  virtual double c() const=0;

  /** Getter for exponential_distribution parameter lambda.
   *
   * @return lambda
   */
  virtual double lambda() const=0;

  /** Getter for the type name of the internal distribution.
   *
   * @return name of distribution
   */
  virtual std::string name()=0;

  /** Destructor of class RandomNumberDistribution.
   *
   * @note must be public such that instances from factory can be destroyed.
   *
   */
  virtual ~RandomNumberDistribution() {};
protected:

  /** Constructor of class RandomNumberDistribution.
   *
   * @note is protected such that instances can only be created by the factory.
   */
  RandomNumberDistribution() {};
};

#endif /* RANDOMNUMBERDISTRIBUTION_HPP_ */