/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkObjectToObjectMetricBase_hxx
#define itkObjectToObjectMetricBase_hxx

#include "itkObjectToObjectMetricBase.h"

namespace itk
{

//-------------------------------------------------------------------
template <typename TInternalComputationValueType>
ObjectToObjectMetricBaseTemplate<TInternalComputationValueType>::ObjectToObjectMetricBaseTemplate()
{
  // Don't call SetGradientSource, to avoid valgrind warning.
  this->m_GradientSource = GradientSourceEnum::GRADIENT_SOURCE_MOVING;
  this->m_Value = NumericTraits<MeasureType>::ZeroValue();
}

//-------------------------------------------------------------------
template <typename TInternalComputationValueType>
bool
ObjectToObjectMetricBaseTemplate<TInternalComputationValueType>::GetGradientSourceIncludesFixed() const
{
  return m_GradientSource == GradientSourceEnum::GRADIENT_SOURCE_FIXED ||
         m_GradientSource == GradientSourceEnum::GRADIENT_SOURCE_BOTH;
}

//-------------------------------------------------------------------
template <typename TInternalComputationValueType>
bool
ObjectToObjectMetricBaseTemplate<TInternalComputationValueType>::GetGradientSourceIncludesMoving() const
{
  return m_GradientSource == GradientSourceEnum::GRADIENT_SOURCE_MOVING ||
         m_GradientSource == GradientSourceEnum::GRADIENT_SOURCE_BOTH;
}

//-------------------------------------------------------------------
template <typename TInternalComputationValueType>
typename ObjectToObjectMetricBaseTemplate<TInternalComputationValueType>::MeasureType
ObjectToObjectMetricBaseTemplate<TInternalComputationValueType>::GetCurrentValue() const
{
  return m_Value;
}

//-------------------------------------------------------------------
template <typename TInternalComputationValueType>
void
ObjectToObjectMetricBaseTemplate<TInternalComputationValueType>::PrintSelf(std::ostream & os, Indent indent) const
{
  Superclass::PrintSelf(os, indent);
  os << indent << "Value: " << m_Value << std::endl;
  os << indent << "GradientSourceEnum: ";
  switch (m_GradientSource)
  {
    case GradientSourceEnum::GRADIENT_SOURCE_FIXED:
      os << "GRADIENT_SOURCE_FIXED";
      break;
    case GradientSourceEnum::GRADIENT_SOURCE_MOVING:
      os << "GRADIENT_SOURCE_MOVING";
      break;
    case GradientSourceEnum::GRADIENT_SOURCE_BOTH:
      os << "GRADIENT_SOURCE_BOTH";
      break;
    default:
      itkExceptionMacro(<< "Unknown GradientSource.");
  }
  os << std::endl;
}

} // namespace itk

#endif