// file: $isip/class/stats/MixtureModel/mm_06.cc
// version: $Id: mm_06.cc 6113 2000-12-29 18:40:28Z peng $
//

// system include files
//
#include <typeinfo>

// isip include files
//
#include "MixtureModel.h"

// method: eq
//
// arguments:
//  const MixtureModel& arg: (input) object to compare
//
// return: true if objects are equal, false otherwise
//
// check the equality of input model to current model
//
bool8 MixtureModel::eq(const MixtureModel& arg_a) const {

  // check models
  //
  if (!models_d.eq(arg_a.models_d)) {
    return false;
  }

  // if the objects are in the same initialization state,
  // we can compare them directly
  //
  if ((mode_d == NONE) && (arg_a.mode_d == NONE)) {
    return weights_d.eq(arg_a.weights_d);
  }

  if ((mode_d == PRECOMPUTE) && (arg_a.mode_d == PRECOMPUTE) &&
      (is_valid_d == arg_a.is_valid_d)) {
    return weights_d.eq(arg_a.weights_d);
  }

  // otherwise, compare the weights on a log scale
  //
  VectorFloat tmp_0(weights_d);
  if ((mode_d == NONE) || (!is_valid_d)) {
    tmp_0.log();
  }
  
  VectorFloat tmp_1(arg_a.weights_d);
  if ((arg_a.mode_d == NONE) || (!arg_a.is_valid_d)) {
    tmp_1.log();
  }
  
  // exit gracefully
  //
  return tmp_0.eq(tmp_1);
}

// method: eq
//
// arguments:
//  const StatisticalModelBase& arg: (input) object to compare
//
// return: true if objects are equal, false otherwise
//
// this method fulfills the StatisticalModelBase interface contract
//
bool8 MixtureModel::eq(const StatisticalModelBase& arg_a) const {

  if (typeid(arg_a) == typeid(MixtureModel)) {
    return eq((MixtureModel&)arg_a);
  }
  else {
    return Error::handle(name(), L"eq", Error::ARG, __FILE__, __LINE__);
  }
}