public List<String> loadFromInputStreamWithTemplates(Resource resource,
      DecisionTableConfiguration configuration) {
    List<String> drls = new ArrayList<String>( configuration.getRuleTemplateConfigurations().size() );
    ExternalSpreadsheetCompiler converter = new ExternalSpreadsheetCompiler();
    for ( RuleTemplateConfiguration template : configuration.getRuleTemplateConfigurations() ) {
      try {
        if ( StringUtils.isEmpty( configuration.getWorksheetName() ) ) {
          drls.add(converter.compile(resource.getInputStream(),
              template.getTemplate().getInputStream(),
              InputType.getInputTypeFromDecisionTableInputType(configuration.getInputType()),
              template.getRow(),
              template.getCol()));
        } else {
          drls.add(converter.compile(resource.getInputStream(),
              configuration.getWorksheetName(),
              template.getTemplate().getInputStream(),
              InputType.getInputTypeFromDecisionTableInputType(configuration.getInputType()),
              template.getRow(),
              template.getCol()));
        }
      } catch (IOException e) {
        logger.error( "Cannot open " + template.getTemplate(), e );
      }
    }
    return drls;
  }