import org.pentaho.di.trans.steps.selectvalues.SelectMetadataChange; //导入依赖的package包/类
private StepMeta getSelectValueToChangeTheDataType(GraphConfigurationInfo graphConfiguration,
    int counter) {
  //
  SelectValuesMeta selectValues = new SelectValuesMeta();
  selectValues.allocate(0, 0, 0);
  StepMeta selectValueMeta = new StepMeta(
      GraphGeneratorConstants.SELECT_REQUIRED_VALUE + "Change Dimension And Measure DataType"
          + System.currentTimeMillis() + counter, (StepMetaInterface) selectValues);
  xAxixLocation += 120;
  selectValueMeta.setName("SelectValueToChangeChangeData");
  selectValueMeta.setLocation(xAxixLocation, yAxixLocation);
  selectValueMeta.setDraw(true);
  selectValueMeta.setDescription(
      "Change The Data Type For Measures: " + GraphGeneratorConstants.SELECT_REQUIRED_VALUE);

  String inputQuery = graphConfiguration.getTableInputSqlQuery();
  String[] columns = parseQueryAndReturnColumns(inputQuery);

  SelectMetadataChange[] changeMeta = new SelectMetadataChange[columns.length];
  Map<String, Boolean> measureDatatypeMap =
      getMeasureDatatypeMap(graphConfiguration.getMeasureDataTypeInfo());
  String[] measures = graphConfiguration.getMeasures();
  String dimensionString = graphConfiguration.getActualDimensionColumns();
  String[] dimension = dimensionString.split(CarbonCommonConstants.AMPERSAND_SPC_CHARACTER);

  for (int i = 0; i < columns.length; i++) {
    changeMeta[i] = new SelectMetadataChange(selectValues);
    changeMeta[i].setName(columns[i]);
    changeMeta[i].setType(2);
    if (isMeasureColumn(measures, columns[i]) && isNotDimesnionColumn(dimension, columns[i])) {
      Boolean isString = measureDatatypeMap.get(columns[i]);
      if (isString != null && isString) {
        changeMeta[i].setType(2);
      } else {
        changeMeta[i].setType(6);
      }
    }
    changeMeta[i].setStorageType(0);
  }
  //
  selectValues.setMeta(changeMeta);
  return selectValueMeta;
}