@Override
  public void initialize(String path, List<String> columns) throws IOException,
      UnsupportedOperationException {
    super.initialize(path, columns);
    initializeInternal();
  }
@ Override public void initialize ( String path , List < String > columns ) throws IOException , UnsupportedOperationException { super . initialize ( path , columns ) ; initializeInternal ( ) ; }
Utility API that will read all the data in path. This circumvents the need to create Hadoop
objects to use this class. `columns` can contain the list of columns to project.