Examples of java.io.DataInputStream.reset()

java.io.DataInputStream.reset()
Repositions this stream to the position at the time the mark method was last called on this input stream.
This method simply performs in.reset().
Stream marks are intended to be used in situations where you need to read ahead a little to see what's in the stream. Often this is most easily done by invoking some general parser. If the stream is of the type handled by the parse, it just chugs along happily. If the stream is not of that type, the parser should toss an exception when it fails. If this happens within readlimit bytes, it allows the outer code to reset the stream and try another parser. @exception IOException if the stream has not been marked or if themark has been invalidated.

    
        This.fTrie = new CharTrie(dis, fTrieFoldingFunc);  // Deserialize the TRIE, leaving input
                                                //  stream at an unknown position, preceding the
                                                //  padding between TRIE and following section.
    
        dis.reset();                            // Move input stream back to marked position at
                                                //   the start of the serialized TRIE.  Now our
                                                //   "pos" variable and the input stream are in
                                                //   agreement.
        
        //

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        {
            return null; // eof
        }


        // reset and read the integer
        dis.reset();
        int length = dis.readInt();
        if (logger.isDebugEnabled())
        {
            logger.debug("length: " + length);
        }

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          logVersion = in.readByte();
        } catch (EOFException e) {
          available = false;
        }
        if (available) {
          in.reset();
          logVersion = in.readInt();
          if (logVersion < FSConstants.LAYOUT_VERSION) // future version
            throw new IOException(
                            "Unexpected version of the file system log file: "
                            + logVersion + ". Current version = "

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          DbgLog.log("TPHdr","data : " + "bytes " + umsgSizeInBytes + ", blknum " + blknum + " from " + numblks + " <" + lnkCompCode + ">");
        bytesread += umsgSizeInBytes;
        if (lockout) continue; // simulate total timeout conditions
        if (lnk.getTineProtocol() == 5)
        { // go back to the mark
          ds.reset();
          dTimeStampUSEC = (int)Swap.Short(ds.readShort()) * 1000;
          dFormat = (short)ds.readByte();
          lnkCounter = (short)ds.readByte();
          dTimeStamp = Swap.Long(ds.readInt());
          lnkStarttime = Swap.Long(ds.readInt());

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      else
      { // a stream combines the 1st 4 bytes into the total (no reassembly)
        len = Swap.Long(ds.readInt());
        // now do some fancy footwork ...
        umsgSizeInBytes = len - 2; // keep the byte counting intact ...
        ds.reset(); // go back to the beginning and ...
        ds.readShort(); // move over the first 2 bytes
      }
      if (TLinkFactory.debugLevel > 1) DbgLog.log("TPHdr","recv : " + length + " bytes (hdr " + len + " bytes)");
      if (len < length)
      {

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        if (TLinkFactory.debugLevel > 1)
          DbgLog.log("TPHdr","data : " + "bytes " + umsgSizeInBytes + ", blknum " + blknum + " from " + numblks + " <" + lnkCompCode + ">");
        bytesread += umsgSizeInBytes;
        if (lnk.getTineProtocol() == 5)
        { // go back to the mark
          ds.reset();
          dTimeStampUSEC = (int)Swap.Short(ds.readShort()) * 1000;
          dFormat = (short)ds.readByte();
          lnkCounter = (short)ds.readByte();
          dTimeStamp = Swap.Long(ds.readInt());
          lnkStarttime = Swap.Long(ds.readInt());

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                smfParser.tracks = numtracks;
            }
        } finally {
            // if only reading the file format, reset the stream
            if (smfParser == null) {
                dis.reset();
            }
        }
        MidiFileFormat format = new MidiFileFormat(type, divisionType, resolution, fileLength, duration);
        return format;
    }

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                            byte[] possible = new byte[match.length];
                            dis.readFully(possible);
                            assertEquals(possible, match);
                            matched = true;
                        } catch (AssertionError ex) {
                            dis.reset();
                            dis.readByte();  // ignore
                        }
                    }
                }
            } else {

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          aBuf = new byte[nSize];
          aIn  = new DataInputStream(new ByteArrayInputStream(aBuf));
        }
        else
        {
          aIn.reset();
        }


        // read parent ID
        rRecordStore.getRecord(nID, aBuf, 0);

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            int status = dis.readUnsignedByte();
            int length = 0;
            //check running status
            if (status < 0x80) {
                status = oldStatus;
                dis.reset();
            }
            if (status >= 0xFF) {//MetaEvent
                int type = dis.readUnsignedByte();
                length = MidiUtil.readVarLength(dis);
                event = MidiUtil.createMetaEvent(type);

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