Examples of java.nio.ByteBuffer.duplicate()

java.nio.ByteBuffer.duplicate()
Returns a duplicated buffer that shares content with this buffer.
The duplicated buffer's position, limit, capacity and mark are the same as this buffer. The duplicated buffer's readonly property and byte order are same as this buffer too.

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 duplicated buffer that shares content with this buffer.

        {
            buf = encodeAsBuffer();
            _encoded = buf;
        }


        buf = buf.duplicate();


        buf.position(0);


        if(dest.remaining() < buf.limit())
        {

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        ByteBuffer value = data.get(i);
        if (value == null)
            return null;


        return value.duplicate();
    }


    public ByteBuffer getBytesUnsafe(String name) {
        return getBytesUnsafe(metadata.getFirstIdx(name));
    }

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        ByteBuffer value = data.get(i);
        if (value == null)
            return null;


        return value.duplicate();
    }


    /**
     * Returns the value of column {@code name} as a ByteBuffer.
     *

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                     * Allocates a new ByteBuffer to receive the message
                     */
                    byte[] msgArray = new byte[length];
                    din.readFully(msgArray, 0, length);
                    ByteBuffer message = ByteBuffer.wrap(msgArray);
                    addToRecvQueue(new Message(message.duplicate(), sid));
                }
            } catch (Exception e) {
                LOG.warn("Connection broken for id " + sid + ", my id = " + 
                        self.getId() + ", error = " , e);
            } finally {

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          ByteBuffer cachedBuf = cache.getBlock(name + block);
          if (cachedBuf != null) {
            // Return a distinct 'copy' of the block, so pos doesnt get messed by
            // the scanner
            cacheHits++;
            return cachedBuf.duplicate();
          }
          // Carry on, please load.
        }


        // Load block from filesystem.

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        readTime += System.currentTimeMillis() - now;
        readOps++;


        // Cache the block
        if(cacheBlock && cache != null) {
          cache.cacheBlock(name + block, buf.duplicate(), inMemory);
        }


        return buf;
      }
    }

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    @Test
    public void testDataOutputDirectByteBuffer() throws IOException
    {
        ByteBuffer buf = wrap(new byte[345], true);
        DataOutputByteBuffer write = new DataOutputByteBuffer(buf.duplicate());
        DataInput canon = testWrite(write);
        DataInput test = new DataInputStream(new ByteArrayInputStream(ByteBufferUtil.getArray(buf)));
        testRead(test, canon);
    }

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    @Test
    public void testDataOutputHeapByteBuffer() throws IOException
    {
        ByteBuffer buf = wrap(new byte[345], false);
        DataOutputByteBuffer write = new DataOutputByteBuffer(buf.duplicate());
        DataInput canon = testWrite(write);
        DataInput test = new DataInputStream(new ByteArrayInputStream(ByteBufferUtil.getArray(buf)));
        testRead(test, canon);
    }

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    private static ByteBuffer wrap(byte[] bytes, boolean direct)
    {
        ByteBuffer buf = direct ? ByteBuffer.allocateDirect(bytes.length + 20) : ByteBuffer.allocate(bytes.length + 20);
        buf.position(10);
        buf.limit(bytes.length + 10);
        buf.duplicate().put(bytes);
        return buf;
    }
}

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      for(int i = 0; i < count; ++i) {
        final int pos = positions[i];
        final int size = sizes[i];


        HyperLogLogCollector.makeCollector(
            (ByteBuffer) buf.duplicate().position(0).limit(
                HyperLogLogCollector.getLatestNumBytesForDenseStorage()
            )
        ).fold(
            HyperLogLogCollector.makeCollector(
                (ByteBuffer) chunk.duplicate().limit(pos + size).position(pos)

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