vtkPointSetXMLParser.cpp

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/*============================================================================

The Medical Imaging Interaction Toolkit (MITK)

Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.

Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.

============================================================================*/

#include "vtkPointSetXMLParser.h"
#include "mitkInteractionConst.h"
#include "mitkOperation.h"
#include "mitkPointOperation.h"
#include "mitkPointSetWriter.h"
#include "vtkObjectFactory.h"

namespace mitk
{
  vtkStandardNewMacro(vtkPointSetXMLParser);
}

mitk::vtkPointSetXMLParser::vtkPointSetXMLParser()
{
}

mitk::vtkPointSetXMLParser::~vtkPointSetXMLParser()
{
}

int mitk::vtkPointSetXMLParser::InitializeParser()
{
  vtkXMLParser::InitializeParser();
  std::istream *stream = this->GetStream();
  if (!stream)
  {
    vtkErrorMacro("no stream available in XML file reader");
    this->ParseError = 1;
    return 0;
  }
  m_PreviousLocale = stream->getloc();
  std::locale I("C");
  stream->imbue(I);
  return 1;
}

int mitk::vtkPointSetXMLParser::CleanupParser()
{
  std::istream *stream = this->GetStream();
  if (!stream)
  {
    vtkErrorMacro("no stream available in XML file reader");
    this->ParseError = 1;
    return 0;
  }
  stream->imbue(m_PreviousLocale);
  vtkXMLParser::CleanupParser();
  return 1;
}

void mitk::vtkPointSetXMLParser::StartElement(const char *name, const char ** /*atts */)
{
  std::string currentElement = name;
  //
  // when a new point set begins in the file, create a new
  // mitk::point set and store it in m_PointSetList
  //
  if (currentElement == mitk::PointSetWriter::XML_POINT_SET)
  {
    m_CurrentPointSet = PointSetType::New();
  }
  //
  // when a new point begins, initialize it to zero.
  //
  else if (currentElement == mitk::PointSetWriter::XML_POINT)
  {
    m_CurrentPoint[0] = 0.0f;
    m_CurrentPoint[1] = 0.0f;
    m_CurrentPoint[2] = 0.0f;
    m_CurId.clear();
    m_CurXString.clear();
    m_CurYString.clear();
    m_CurZString.clear();
  }

  //
  // the current element is pushed on to the stack
  // to be able to detect some errors in the xml file
  //
  m_ParseStack.push(currentElement);
}

void mitk::vtkPointSetXMLParser::EndElement(const char *name)
{
  std::string currentElement = name;

  //
  // make sure, that the current end element matches with the
  // last start tag
  //
  if (m_ParseStack.top() != currentElement)
  {
    MITK_ERROR << "Top of parse stack ( " << m_ParseStack.top() << " ) is != currentEndElement ( " << currentElement
               << " )!" << std::endl;
  }
  m_ParseStack.pop();

  //
  // After a complete point set has been parsed, its
  // output information is updated and it is inserted into the list
  // of parsed point sets.
  //
  if (currentElement == mitk::PointSetWriter::XML_POINT_SET)
  {
    m_CurrentPointSet->UpdateOutputInformation();
    m_PointSetList.push_back(m_CurrentPointSet);
  }
  //
  // if we have finished parsing a point, insert it to the current
  // point set.
  //
  else if (currentElement == mitk::PointSetWriter::XML_POINT)
  {
    m_CurrentPointId = ParsePointIdentifier(m_CurId);
    m_CurrentPoint[0] = ParseScalarType(m_CurXString);
    m_CurrentPoint[1] = ParseScalarType(m_CurYString);
    m_CurrentPoint[2] = ParseScalarType(m_CurZString);

    mitk::PointOperation popInsert(mitk::OpINSERT, m_CurrentPoint, m_CurrentPointId);
    mitk::PointOperation popDeactivate(mitk::OpDESELECTPOINT, m_CurrentPoint, m_CurrentPointId);
    assert(m_CurrentPointSet.IsNotNull());
    m_CurrentPointSet->ExecuteOperation(&popInsert);
    m_CurrentPointSet->ExecuteOperation(&popDeactivate);
  }
}

void mitk::vtkPointSetXMLParser::CharacterDataHandler(const char *inData, int inLength)
{
  std::string currentElement = m_ParseStack.top();
  if (currentElement == mitk::PointSetWriter::XML_ID)
  {
    m_CurId.append(inData, inLength);
  }
  else if (currentElement == mitk::PointSetWriter::XML_X)
  {
    m_CurXString.append(inData, inLength);
  }
  else if (currentElement == mitk::PointSetWriter::XML_Y)
  {
    m_CurYString.append(inData, inLength);
  }
  else if (currentElement == mitk::PointSetWriter::XML_Z)
  {
    m_CurZString.append(inData, inLength);
  }
}

mitk::ScalarType mitk::vtkPointSetXMLParser::ParseScalarType(const std::string &data)
{
  std::istringstream stm;
  stm.str(data);
  ScalarType number;
  stm >> number;
  return number;
}

mitk::vtkPointSetXMLParser::PointIdentifier mitk::vtkPointSetXMLParser::ParsePointIdentifier(const std::string &data)
{
  std::istringstream stm;
  stm.str(data);
  PointIdentifier pointID;
  stm >> pointID;
  return pointID;
}

mitk::vtkPointSetXMLParser::PointSetList mitk::vtkPointSetXMLParser::GetParsedPointSets()
{
  return m_PointSetList;
}