vtkDataSetToWsName.cpp

#include "MantidVatesAPI/vtkDataSetToWsName.h"
#include "MantidVatesAPI/FieldDataToMetadata.h"
#include "MantidVatesAPI/VatesXMLDefinitions.h"
#include "MantidGeometry/MDGeometry/MDGeometryXMLDefinitions.h"
#include <vtkDataSet.h>
#include <Poco/AutoPtr.h>
#include <Poco/DOM/DOMParser.h>
#include <Poco/DOM/Element.h>
#include <Poco/DOM/Document.h>

namespace Mantid {
namespace VATES {
/**
Static creational method to run functionality in one method call.
@param dataset : input dataset containing field data.
@return extracted workspace name.
*/
std::string vtkDataSetToWsName::exec(vtkDataSet *dataset) {
  vtkDataSetToWsName temp(dataset);
  return temp.execute();
}

/**
Constructor
@param dataSet : input dataset containing field data.
*/
vtkDataSetToWsName::vtkDataSetToWsName(vtkDataSet *dataSet)
    : m_dataset(dataSet) {
  if (!m_dataset) {
    throw std::runtime_error(
        "Tried to construct vtkDataSetToWsName with NULL vtkDataSet");
  }
}

/**
Runs the extraction
@return extracted workspace name.
*/
std::string vtkDataSetToWsName::execute() {
  using Mantid::Geometry::MDGeometryXMLDefinitions;
  FieldDataToMetadata convert;
  std::string xmlString =
      convert(m_dataset->GetFieldData(), XMLDefinitions::metaDataId());

  Poco::XML::DOMParser pParser;
  Poco::AutoPtr<Poco::XML::Document> pDoc = pParser.parseString(xmlString);
  Poco::XML::Element *pRootElem = pDoc->documentElement();
  Poco::XML::Element *wsNameElem = pRootElem->getChildElement(
      MDGeometryXMLDefinitions::workspaceNameElementName());
  if (!wsNameElem) {
    throw std::runtime_error(
        "The element containing the workspace name must be present.");
  }
  return wsNameElem->innerText();
}

/// Destructor.
vtkDataSetToWsName::~vtkDataSetToWsName() = default;
}
}