49     private BlockInputStream blockDecoder = null;  field in SingleXZInputStream
418                 if (blockDecoder == null) {  in read()
420                         blockDecoder = new BlockInputStream(  in read()
431                 int ret = blockDecoder.read(buf, off, len);  in read()
438                     indexHash.add(blockDecoder.getUnpaddedSize(),  in read()
439                                   blockDecoder.getUncompressedSize());  in read()
440                     blockDecoder = null;  in read()
482         return blockDecoder == null ? 0 : blockDecoder.available();  in available()
522             if (blockDecoder != null) {  in close()
523                 blockDecoder.close();  in close()
524                 blockDecoder = null;  in close()