public void write(XMLWriter writer, ExportParams params) {
    Collection<DataDictionary> dataDictionaries =
        dataDictionaryService.getDataDictionaries(params.getDataDictionaries());

    if (dataDictionaries != null && dataDictionaries.size() > 0) {
      writer.openElement(COLLECTION_NAME);

      for (DataDictionary dictionary : dataDictionaries) {
        if (dictionary.getDataElements() != null) {
          for (Indicator indicator : dictionary.getIndicators()) {
            writer.openElement(ELEMENT_NAME);

            writer.writeElement(FIELD_DATADICTIONARY, String.valueOf(dictionary.getId()));
            writer.writeElement(FIELD_INDICATOR, String.valueOf(indicator.getId()));

            writer.closeElement();
          }
        }
      }

      writer.closeElement();
    }
  }
  @Transactional
  public void matchObject(int importObjectId, int existingObjectId) {
    ImportObject importObject = importObjectStore.getImportObject(importObjectId);

    Object object = importObject.getObject();

    // ---------------------------------------------------------------------
    // Updates the name of the import object to the name of the existing
    // object.
    // ---------------------------------------------------------------------

    if (object.getClass().equals(DataElement.class)) {
      DataElement element = (DataElement) object;

      element.setName(dataElementService.getDataElement(existingObjectId).getName());
    } else if (object.getClass().equals(DataElementGroup.class)) {
      DataElementGroup group = (DataElementGroup) object;

      group.setName(dataElementService.getDataElementGroup(existingObjectId).getName());
    } else if (object.getClass().equals(DataElementGroupSet.class)) {
      DataElementGroupSet groupSet = (DataElementGroupSet) object;

      groupSet.setName(dataElementService.getDataElementGroupSet(existingObjectId).getName());
    } else if (object.getClass().equals(IndicatorType.class)) {
      IndicatorType type = (IndicatorType) object;

      type.setName(indicatorService.getIndicatorType(existingObjectId).getName());
    } else if (object.getClass().equals(Indicator.class)) {
      Indicator indicator = (Indicator) object;

      indicator.setName(indicatorService.getIndicator(existingObjectId).getName());
    } else if (object.getClass().equals(IndicatorGroup.class)) {
      IndicatorGroup group = (IndicatorGroup) object;

      group.setName(indicatorService.getIndicatorGroup(existingObjectId).getName());
    } else if (object.getClass().equals(IndicatorGroupSet.class)) {
      IndicatorGroupSet groupSet = (IndicatorGroupSet) object;

      groupSet.setName(indicatorService.getIndicatorGroupSet(existingObjectId).getName());
    } else if (object.getClass().equals(DataDictionary.class)) {
      DataDictionary dictionary = (DataDictionary) object;

      dictionary.setName(dataDictionaryService.getDataDictionary(existingObjectId).getName());
    } else if (object.getClass().equals(DataSet.class)) {
      DataSet dataSet = (DataSet) object;

      dataSet.setName(dataSetService.getDataSet(existingObjectId).getName());
    } else if (object.getClass().equals(OrganisationUnit.class)) {
      OrganisationUnit unit = (OrganisationUnit) object;

      unit.setName(organisationUnitService.getOrganisationUnit(existingObjectId).getName());
    } else if (object.getClass().equals(OrganisationUnitGroup.class)) {
      OrganisationUnitGroup group = (OrganisationUnitGroup) object;

      group.setName(
          organisationUnitGroupService.getOrganisationUnitGroup(existingObjectId).getName());
    } else if (object.getClass().equals(OrganisationUnitGroupSet.class)) {
      OrganisationUnitGroupSet groupSet = (OrganisationUnitGroupSet) object;

      groupSet.setName(
          organisationUnitGroupService.getOrganisationUnitGroupSet(existingObjectId).getName());
    } else if (object.getClass().equals(OrganisationUnitLevel.class)) {
      OrganisationUnitLevel level = (OrganisationUnitLevel) object;

      level.setName(organisationUnitService.getOrganisationUnitLevel(existingObjectId).getName());
    } else if (object.getClass().equals(ValidationRule.class)) {
      ValidationRule validationRule = (ValidationRule) object;

      validationRule.setName(validationRuleService.getValidationRule(existingObjectId).getName());
    } else if (object.getClass().equals(Report.class)) {
      Report report = (Report) object;

      report.setName(reportService.getReport(existingObjectId).getName());
    } else if (object.getClass().equals(ReportTable.class)) {
      ReportTable reportTable = (ReportTable) object;

      reportTable.setName(reportTableService.getReportTable(existingObjectId).getName());
    } else if (object.getClass().equals(Chart.class)) {
      Chart chart = (Chart) object;

      chart.setName(chartService.getChart(existingObjectId).getName());
    } else if (object.getClass().equals(DataValue.class)) {
      DataValue dataValue = (DataValue) object;

      dataValue =
          updateDataValue(
              dataValue,
              dataValueService.getDataValue(
                  dataValue.getSource(),
                  dataValue.getDataElement(),
                  dataValue.getPeriod(),
                  dataValue.getOptionCombo()));
    }

    // ---------------------------------------------------------------------
    // Sets the status of the import object to match, these objects will
    // later be ignored on import all but is needed for matching of
    // associations.
    // ---------------------------------------------------------------------

    importObject.setStatus(ImportObjectStatus.MATCH);

    importObjectStore.updateImportObject(importObject);
  }