*/
public static Reader createReaderWithEncoding(
FileSystem fs, Path path, CacheConfig cacheConf,
DataBlockEncoding preferredEncodingInCache) throws IOException {
final boolean closeIStream = true;
HFileSystem hfs = null;
FSDataInputStream fsdis = fs.open(path);
FSDataInputStream fsdisNoFsChecksum = fsdis;
// If the fs is not an instance of HFileSystem, then create an
// instance of HFileSystem that wraps over the specified fs.
// In this case, we will not be able to avoid checksumming inside
// the filesystem.
if (!(fs instanceof HFileSystem)) {
hfs = new HFileSystem(fs);
} else {
hfs = (HFileSystem)fs;
// open a stream to read data without checksum verification in
// the filesystem
fsdisNoFsChecksum = hfs.getNoChecksumFs().open(path);
}
return pickReaderVersion(path, fsdis, fsdisNoFsChecksum,
fs.getFileStatus(path).getLen(), closeIStream, cacheConf,
preferredEncodingInCache, hfs);
}