Examples of java.nio.ByteBuffer.slice()

java.nio.ByteBuffer.slice()
Returns a sliced buffer that shares content with this buffer.
The sliced buffer's capacity will be this buffer's remaining(), and its zero position will correspond to this buffer's current position. The new buffer's position will be 0, limit will be its capacity, and its mark is unset. The new buffer's readonly property and byte order are same as this buffer.

The new buffer shares content with this buffer, which means either buffer's change of content will be visible to the other. The two buffer's position, limit and mark are independent.
@return A sliced buffer that shares content with this buffer.

  private <K, V> void assertRoundTripEquality(KeyValuesMarshaller<K, V> marshaller, K key,
      List<V> values) {
    ByteBuffer bytes = marshaller.toBytes(new KeyValue<>(key, values));
    KeyValue<K, Iterable<V>> reconstructed = marshaller.fromBytes(bytes.slice());
    validateEqual(key, values, reconstructed);
    reconstructed = marshaller.fromBytes(bytes.slice());
    assertEquals(bytes, marshaller.toBytes(reconstructed));
  }


  private <K, V> void validateEqual(K key, List<V> values,
      KeyValue<K, ? extends Iterable<V>> reconstructed) {

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      @SuppressWarnings({"unchecked", "rawtypes"})
      ByteBuffer bytes = m.toBytes(new KeyValue(key, valueValues));
      KeyValue<KeyValue<Integer, ? extends Iterable<String>>,
          Iterable<KeyValue<Integer, ? extends Iterable<String>>>> reconstructed =
              m.fromBytes(bytes.slice());
      validateEqual(key.getKey(), keyStrings, reconstructed.getKey());


      Iterator<KeyValue<Integer, ? extends Iterable<String>>> reconValues =
          reconstructed.getValue().iterator();
      for (KeyValue<Integer, ? extends List<String>> value : valueValues) {

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    LinkedHashMap<ByteBuffer, List<ByteBuffer>> map =
        sortUntilFull(s, new StringStringGenerator(numberToWrite - 1), null);
    s = createWorker(numberToWrite);
    ByteBuffer last = map.keySet().toArray(new ByteBuffer[] {})[numberToWrite - 2];
    map = sortUntilFull(s, new StringStringGenerator(numberToWrite - 1),
        new KeyValue<>(last.slice(), ByteBuffer.allocate(StringStringGenerator.VALUE_SIZE)));
    assertTrue(s.isFull()); // Confirms the bufferCapacity setting above.
    assertEquals(numberToWrite - 1, map.size());
    String previous = "\0";
    for (ByteBuffer key : map.keySet()) {
      String string = US_ASCII.decode(key).toString();

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     * without the length prefix.
     */
    ByteBuffer result = readBuffer.duplicate();
    result.limit(messageLen);
    result.position(PREFIX_LENGTH);
                set(result.slice().asReadOnlyBuffer());
                return null;
            } else {
    if (logger.isLoggable(Level.FINER)) {
        logger.log(Level.FINER, "{0} read incomplete {1}:{2}",
             this, messageLen, readBuffer.position());

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    @Override
    public ByteBuffer read(int position, int length) {
        ByteBuffer entry = buffer.asReadOnlyBuffer();
        entry.position(position);
        entry.limit(position + length);
        return entry.slice();
    }


    @Override
    public synchronized void write(
            int position, byte[] b, int offset, int length)

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            if (encoding != DataBlockEncoding.NONE) {
              // We expect a two-byte big-endian encoding id.
              assertEquals(0, actualBuffer.get(0));
              assertEquals(encoding.getId(), actualBuffer.get(1));
              actualBuffer.position(2);
              actualBuffer = actualBuffer.slice();
            }


            ByteBuffer expectedBuffer = encodedBlocks.get(blockId);
            expectedBuffer.rewind();

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                case Leader.REQUEST:
                    bb = ByteBuffer.wrap(qp.getData());
                    sessionId = bb.getLong();
                    cxid = bb.getInt();
                    type = bb.getInt();
                    bb = bb.slice();
                    if(type == OpCode.sync){
                       leader.zk.submitRequest(new FollowerSyncRequest(this, sessionId, cxid, type, bb,
                                qp.getAuthinfo()));
                    } else {
                    leader.zk.submitRequest(null, sessionId, type, cxid, bb,

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      }


      // TODO: Could this be done with one ByteBuffer rather than create two?
      ByteBuffer valueBuff = blockBuffer.slice();
      valueBuff.position(currKeyLen);
      valueBuff = valueBuff.slice();
      valueBuff.limit(currValueLen);
      valueBuff.rewind();
      return valueBuff;
    }

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  public int charAt(int position) {
    if (position > this.length) return -1; // too long
    if (position < 0) return -1; // duh.
      
    ByteBuffer bb = (ByteBuffer)ByteBuffer.wrap(bytes).position(position);
    return bytesToCodePoint(bb.slice());
  }
  
  public int find(String what) {
    return find(what, 0);
  }

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            if (encoding != DataBlockEncoding.NONE) {
              // We expect a two-byte big-endian encoding id.
              assertEquals(0, actualBuffer.get(0));
              assertEquals(encoding.getId(), actualBuffer.get(1));
              actualBuffer.position(2);
              actualBuffer = actualBuffer.slice();
            }


            ByteBuffer expectedBuffer = encodedBlocks.get(blockId);
            expectedBuffer.rewind();

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