presto-orc/src/main/java/io/prestosql/orc/FileOrcDataSource.java/FileOrcDataSource/FileOrcDataSource
class FileOrcDataSource:    public FileOrcDataSource(File path, OrcReaderOptions options)
            throws FileNotFoundException
    {
        super(new OrcDataSourceId(path.getPath()), path.length(), options);
        this.input = new RandomAccessFile(path, "r");
    }