C++ File::openPath方法代码示例

void
SaveNXTomo::writeIntensityValue(const DataObjects::Workspace2D_sptr workspace,
                                ::NeXus::File &nxFile, int thisFileInd) {
  // Add Intensity to control if present, use 1 if not
  try {
    nxFile.openPath("/entry1/tomo_entry/control");
  } catch (...) {
    throw std::runtime_error("Unable to create a valid NXTomo file");
  }

  std::vector<double> intensityValue;
  intensityValue.push_back(1);

  if (workspace->run().hasProperty("Intensity")) {
    std::string tmpVal = workspace->run().getLogData("Intensity")->value();
    try {
      intensityValue[0] = boost::lexical_cast<double>(tmpVal);
    } catch (...) {
    }
    // Invalid Cast is handled below
  }

  nxFile.openData("data");
  nxFile.putSlab(intensityValue, thisFileInd, 1);
  nxFile.closeData();
}

void SaveNXTomo::writeLogValues(const DataObjects::Workspace2D_sptr workspace,
                                ::NeXus::File &nxFile, int thisFileInd) {
  // Add Log information (minus special values - Rotation, ImageKey, Intensity)
  // Unable to add multidimensional string data, storing strings as
  // multidimensional data set of uint8 values
  try {
    nxFile.openPath("/entry1/log_info");
  } catch (...) {
    throw std::runtime_error("Unable to create a valid NXTomo file");
  }

  // Loop through all log values, create it if it doesn't exist. Then append
  // value
  std::vector<Property *> logVals = workspace->run().getLogData();

  for (auto it = logVals.begin(); it != logVals.end(); ++it) {
    auto prop = *it;
    if (prop->name() != "ImageKey" && prop->name() != "Rotation" &&
        prop->name() != "Intensity" && prop->name() != "Axis1" &&
        prop->name() != "Axis2") {
      try {
        nxFile.openData(prop->name());
      } catch (::NeXus::Exception &) {
        // Create the data entry if it doesn't exist yet, and open.
        std::vector<int64_t> infDim;
        infDim.push_back(NX_UNLIMITED);
        infDim.push_back(NX_UNLIMITED);
        nxFile.makeData(prop->name(), ::NeXus::UINT8, infDim, true);
      }

      size_t strSize = prop->value().length();

      char *val = new char[80]();

      // If log value is from FITS file as it should be,
      // it won't be greater than this. Otherwise Shorten it
      if (strSize > 80)
        strSize = 80;

      strncpy(val, prop->value().c_str(), strSize);

      std::vector<int64_t> start, size;
      start.push_back(thisFileInd);
      start.push_back(0);
      size.push_back(1);
      size.push_back(strSize);

      // single item
      nxFile.putSlab(val, start, size);

      nxFile.closeData();
    }
  }
}

/**
 * Writes a single workspace into the file
 * @param workspace the workspace to get data from
 * @param nxFile the nexus file to save data into
 */
void SaveNXTomo::writeSingleWorkspace(const Workspace2D_sptr workspace,
                                      ::NeXus::File &nxFile) {
  try {
    nxFile.openPath("/entry1/tomo_entry/data");
  } catch (...) {
    throw std::runtime_error("Unable to create a valid NXTomo file");
  }

  int numFiles = 0;
  nxFile.getAttr<int>("NumFiles", numFiles);

  // Change slab start to after last data position
  m_slabStart[0] = numFiles;
  m_slabSize[0] = 1;

  // Set the rotation value for this WS
  std::vector<double> rotValue;
  rotValue.push_back(0);

  if (workspace->run().hasProperty("Rotation")) {
    std::string tmpVal = workspace->run().getLogData("Rotation")->value();
    try {
      rotValue[0] = boost::lexical_cast<double>(tmpVal);
    } catch (...) {
    }
    // Invalid Cast is handled below
  }

  nxFile.openData("rotation_angle");
  nxFile.putSlab(rotValue, numFiles, 1);
  nxFile.closeData();

  // Copy data out, remake data with dimension of old size plus new elements.
  // Insert previous data.
  nxFile.openData("data");

  double *dataArr = new double[m_spectraCount];

  for (int64_t i = 0; i < m_dimensions[1]; ++i) {
    for (int64_t j = 0; j < m_dimensions[2]; ++j) {
      dataArr[i * m_dimensions[1] + j] =
          workspace->dataY(i * m_dimensions[1] + j)[0];
    }
  }

  nxFile.putSlab(dataArr, m_slabStart, m_slabSize);

  nxFile.closeData();

  nxFile.putAttr("NumFiles", numFiles + 1);

  nxFile.closeGroup();

  // Write additional log information, intensity and image key
  writeLogValues(workspace, nxFile, numFiles);
  writeIntensityValue(workspace, nxFile, numFiles);
  writeImageKeyValue(workspace, nxFile, numFiles);

  ++numFiles;

  delete[] dataArr;
}