Examples of java.util.zip.Checksum.update()

java.util.zip.Checksum.update()
Updates the current checksum with the specified byte. @param b the byte to update the checksum with

                    break;
                }


                ByteArrayInputStream bufIn = new ByteArrayInputStream(bytes);
                Checksum checksum = new CRC32();
                checksum.update(bytes, 0, bytes.length);
                if (claimedCRC32 != checksum.getValue())
                {
                    // this part of the log must not have been fsynced.  probably the rest is bad too,
                    // but just in case there is no harm in trying them.
                    continue;

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    @Test
    public void testRecoveryWithBadSizeChecksum() throws Exception
    {
        Checksum checksum = new CRC32();
        checksum.update(100);
        testRecoveryWithBadSizeArgument(100, 100, ~checksum.getValue());
    }
    
    @Test
    public void testRecoveryWithZeroSegmentSizeArgument() throws Exception

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    }


    protected void testRecoveryWithBadSizeArgument(int size, int dataSize) throws Exception
    {
        Checksum checksum = new CRC32();
        checksum.update(size);
        testRecoveryWithBadSizeArgument(size, dataSize, checksum.getValue());
    }


    protected void testRecoveryWithBadSizeArgument(int size, int dataSize, long checksum) throws Exception
    {

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                        // This prevents CRC by being fooled by special-case garbage in the file; see CASSANDRA-2128
                        if (serializedSize < 10)
                            break;
                        long claimedSizeChecksum = reader.readLong();
                        checksum.reset();
                        checksum.update(serializedSize);
                        if (checksum.getValue() != claimedSizeChecksum)
                            break; // entry wasn't synced correctly/fully.  that's ok.


                        if (serializedSize > bytes.length)
                            bytes = new byte[(int) (1.2 * serializedSize)];

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                    catch(EOFException eof)
                    {
                        break; // last CL entry didn't get completely written.  that's ok.
                    }


                    checksum.update(bytes, 0, serializedSize);
                    if (claimedCRC32 != checksum.getValue())
                    {
                        // this entry must not have been fsynced.  probably the rest is bad too,
                        // but just in case there is no harm in trying them (since we still read on an entry boundary)
                        continue;

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        }


        return;
      }
      Checksum crc = new Adler32();
      crc.update(bytes, 0, bytes.length);
      if (crcValue != crc.getValue())
      {
        throw new IOException("CRC doesn't match " + crcValue + " vs "
            + crc.getValue());
      }

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            if (buf == null || buf.length == 0) {
                throw new IOException("Faulty serialization for header " +
                    "and txn");
            }
            Checksum crc = makeChecksumAlgorithm();
            crc.update(buf, 0, buf.length);
            oa.writeLong(crc.getValue(), "txnEntryCRC");
            Util.writeTxnBytes(oa, buf);
        }    
    }

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                if (bytes == null || bytes.length==0)
                   throw new EOFException("Failed to read"); 
                // EOF or corrupted record
                // validate CRC
                Checksum crc = makeChecksumAlgorithm();
                crc.update(bytes, 0, bytes.length);
                if (crcValue != crc.getValue()) 
                    throw new IOException(CRC_ERROR);
                if (bytes == null || bytes.length == 0)
                    return false;
                InputArchive iab = BinaryInputArchive

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        markDirty(rowMutation, repPos);


        Checksum checksum = new PureJavaCrc32();
        byte[] serializedRow = rowMutation.getSerializedBuffer(MessagingService.current_version);


        checksum.update(serializedRow.length);
        buffer.putInt(serializedRow.length);
        buffer.putLong(checksum.getValue());


        buffer.put(serializedRow);
        checksum.update(serializedRow, 0, serializedRow.length);

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        checksum.update(serializedRow.length);
        buffer.putInt(serializedRow.length);
        buffer.putLong(checksum.getValue());


        buffer.put(serializedRow);
        checksum.update(serializedRow, 0, serializedRow.length);
        buffer.putLong(checksum.getValue());


        if (buffer.remaining() >= 4)
        {
            // writes end of segment marker and rewinds back to position where it starts

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