code: private void initFilters() {
          listFilter = new GenListModuleReader();
          listFilter.setLogger(logger);
          listFilter.setPrimaryDitamap(rootFile);
          listFilter.setJob(job);
  
          if (profilingEnabled) {
              filterUtils = parseFilterFile();
          }
  
          if (INDEX_TYPE_ECLIPSEHELP.equals(transtype)) {
              exportAnchorsFilter = new ExportAnchorsFilter();
              exportAnchorsFilter.setInputFile(rootFile);
          }
  
          keydefFilter = new KeydefFilter();
          keydefFilter.setLogger(logger);
          keydefFilter.setCurrentFile(rootFile);
          keydefFilter.setJob(job);
  
          nullHandler = new DefaultHandler();
      }
docs: Initialize reusable filters.