File: otbStatisticsXMLFileWriter.h

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/*
 * Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * 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
 *
 * 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 otbStatisticsXMLFileWriter_h
#define otbStatisticsXMLFileWriter_h

#include "itkProcessObject.h"
#include <utility>
#include <string>

namespace otb {

/** \class StatisticsXMLFileWriter
 *  \brief Write in a xml file the values stored in a MeasurementVector set as
 *  input
 *
 * The vector can be set as input via AddInput(name, vector) where name
 * is the name of the statistic, and vector the values.
 * Supported vector types are those implementing the method GetElement(idx)
 * and defining the type ValueType.
 *
 *
 * \ingroup OTBIOXML
 */
template < class TMeasurementVector>
class  StatisticsXMLFileWriter :
    public itk::Object
{
public:
  /** Standard class typedefs */
  typedef StatisticsXMLFileWriter          Self;
  typedef itk::Object                      Superclass;
  typedef itk::SmartPointer< Self >        Pointer;
  typedef itk::SmartPointer<const Self>    ConstPointer;

  /** Run-time type information (and related methods). */
  itkTypeMacro(StatisticsXMLFileWriter, itk::Object);

  /** Method for creation through the object factory. */
  itkNewMacro(Self);

  /** InputSampleList typedefs */
  typedef TMeasurementVector                             MeasurementVectorType;
  typedef typename MeasurementVectorType::ValueType      InputValueType;

  /** Convenient typedef */
  typedef std::pair<std::string , MeasurementVectorType>  InputDataType;
  typedef std::vector< InputDataType >                   MeasurementVectorContainer;
  
  typedef std::map<std::string , std::string>           GenericMapType;
  typedef std::map<std::string , GenericMapType>        GenericMapContainer;

  /** Method to set/get the input list sample */
  void AddInput(const char * name,  const MeasurementVectorType& inputVector );
  
  /** Method to add a map statistic with a given type */
  template <typename MapType>
  void AddInputMap(const char * name, const MapType& map );

  /** Remove previously added inputs (vectors and maps) */
  void CleanInputs();

  /** Trigger the processing */
  void Update()
  {
    this->GenerateData();
  }

  /** Set the output filename */
  itkSetStringMacro(FileName);
  itkGetStringMacro(FileName);

protected:

  virtual void GenerateData();

  StatisticsXMLFileWriter();
  ~StatisticsXMLFileWriter() override {}
  void PrintSelf(std::ostream& os, itk::Indent indent) const override;

private:
  StatisticsXMLFileWriter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  std::string                 m_FileName;
  MeasurementVectorContainer  m_MeasurementVectorContainer;
  GenericMapContainer         m_GenericMapContainer;

}; // end of class StatisticsXMLFileWriter

} // end of namespace otb

#ifndef OTB_MANUAL_INSTANTIATION
#include "otbStatisticsXMLFileWriter.txx"
#endif

#endif