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/*=========================================================================
*
* 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
*
* https://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 itkCommandIterationUpdate_h
#define itkCommandIterationUpdate_h
#include "itkCommand.h"
#include "itkWeakPointer.h"
namespace itk
{
/**
* Implementation of the Command Pattern to be invoked every iteration
* \class CommandIterationUpdate
* \ingroup ITKRegistrationCommon
*/
template <typename TOptimizer>
class CommandIterationUpdate : public Command
{
public:
/**
* Standard "Self" typedef.
*/
using Self = CommandIterationUpdate;
/**
* Standard "Superclass" typedef.
*/
using Superclass = itk::Command;
/**
* Smart pointer type alias support
*/
using Pointer = itk::SmartPointer<Self>;
/**
* ConstSmart pointer type alias support
*/
using ConstPointer = itk::SmartPointer<const Self>;
/**
* Execute method will print data at each iteration
*/
void
Execute(itk::Object * caller, const itk::EventObject & event) override
{
Execute((const itk::Object *)caller, event);
}
void
Execute(const itk::Object *, const itk::EventObject & event) override
{
if (typeid(event) == typeid(itk::StartEvent))
{
std::cout << std::endl << "Position Value" << std::endl << std::endl;
}
else if (typeid(event) == typeid(itk::IterationEvent))
{
std::cout << m_Optimizer->GetCurrentIteration() << " = " << m_Optimizer->GetValue() << " : "
<< m_Optimizer->GetCurrentPosition() << std::endl;
}
else if (typeid(event) == typeid(itk::EndEvent))
{
std::cout << std::endl
<< std::endl
<< "After " << m_Optimizer->GetCurrentIteration() << " iterations " << std::endl
<< "Solution is = " << m_Optimizer->GetCurrentPosition() << std::endl
<< "With value = " << m_Optimizer->GetValue() << std::endl
<< "Stop condition = " << m_Optimizer->GetStopCondition() << std::endl;
}
}
/**
* Run-time type information (and related methods).
*/
itkOverrideGetNameOfClassMacro(CommandIterationUpdate);
/**
* Method for creation through the object factory.
*/
itkNewMacro(Self);
/**
* Type defining the optimizer
*/
using OptimizerType = TOptimizer;
/**
* Set Optimizer
*/
void
SetOptimizer(OptimizerType * optimizer)
{
m_Optimizer = optimizer;
m_Optimizer->AddObserver(itk::IterationEvent(), this);
}
protected:
/**
* Constructor
*/
CommandIterationUpdate() = default;
private:
/**
* WeakPointer to the Optimizer
*/
WeakPointer<OptimizerType> m_Optimizer{};
};
} // end namespace itk
#endif
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