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.


        for (int i = 0; i < size(); i++)
        {
            ByteBuffer bb = get(i);
            ByteBufferUtil.writeShortLength(result, bb.remaining());
            result.put(bb.duplicate());
            result.put((byte)0);
        }
        result.flip();
        return result;
    }

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                            numbytes += channel.read(message);
                        }
                        message.position(0);
                        synchronized (recvQueue) {
                            recvQueue
                                    .put(new Message(message.duplicate(), sid));
                        }
                        msgLength.position(0);
                    }
                }

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                            numbytes += channel.read(message);
                        }
                        message.position(0);
                        synchronized (recvQueue) {
                            recvQueue
                                    .put(new Message(message.duplicate(), sid));
                        }
                        msgLength.position(0);
                    }
                }

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            if (count > buffer.remaining()) {
                throw runtime.newIndexError("read count too big for output buffer");
            }


            if (count < buffer.remaining()) {
                buffer = buffer.duplicate();
                buffer.limit(count);
            }


            // TODO: This used to use ChannelStream and honor its buffers; it does not honor OpenFile buffers now
            return runtime.newFixnum(openFile.readChannel().read(buffer));

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        /**
         * Test the basic write and drain
         */
        final ByteBuffer b = ByteBuffer.allocate(5);
        wstream.enqueue(b.duplicate());
        assertEquals( 5, wstream.calculatePendingWriteDelta(EstTime.currentTimeMillis() + 5));
        wstream.drainTo( channel, wstream.swapAndSerializeQueuedWrites(pool));
        assertEquals( 0, wstream.calculatePendingWriteDelta(EstTime.currentTimeMillis() + 5));


        Thread.sleep(20);

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        assertEquals( 0, wstream.calculatePendingWriteDelta(EstTime.currentTimeMillis() + 5));


        Thread.sleep(20);
        EstTimeUpdater.update(System.currentTimeMillis());


        wstream.enqueue(b.duplicate());
        assertEquals( 5, wstream.calculatePendingWriteDelta(EstTime.currentTimeMillis() + 5));
        wstream.enqueue(b.duplicate());
        assertEquals( 5, wstream.calculatePendingWriteDelta(EstTime.currentTimeMillis() + 5));
        channel.m_behavior = MockChannel.PARTIAL;
        wstream.drainTo( channel, wstream.swapAndSerializeQueuedWrites(pool));

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        Thread.sleep(20);
        EstTimeUpdater.update(System.currentTimeMillis());


        wstream.enqueue(b.duplicate());
        assertEquals( 5, wstream.calculatePendingWriteDelta(EstTime.currentTimeMillis() + 5));
        wstream.enqueue(b.duplicate());
        assertEquals( 5, wstream.calculatePendingWriteDelta(EstTime.currentTimeMillis() + 5));
        channel.m_behavior = MockChannel.PARTIAL;
        wstream.drainTo( channel, wstream.swapAndSerializeQueuedWrites(pool));
        assertEquals( 5, wstream.calculatePendingWriteDelta(EstTime.currentTimeMillis() + 5));

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            LOG.trace("c_aggregate position :" + c_aggregate.position());
            LOG.trace("c_aggregate capacity :" + c_aggregate.capacity());


            if (needsConversion == null) {
                VoltTable old_table = PrivateVoltTableFactory.createVoltTableFromBuffer(c_aggregate.duplicate(), true);
                needsConversion = SavedTableConverter.needsConversion(old_table, new_catalog_table);
            }


            final VoltTable old_table = PrivateVoltTableFactory.createVoltTableFromBuffer(c_aggregate, true);
            if (needsConversion) {

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            throw new NullPointerException("Null bufferArray argument");
        if (!(isBufferArray(bufferArray)))
            throw new IllegalArgumentException("The passed argument is not a buffer array");
        ByteBuffer bb = ((DirectDataStorages.DirectStorage)((AbstractBufferArray)bufferArray).storage).bb;
        ByteOrder o = bb.order();
        return bufferArray.isImmutable() ? bb.asReadOnlyBuffer().order(o) : bb.duplicate().order(o);
    }


    /**
     * Returns the start offset in the buffer returned by {@link #getByteBuffer(Array)} call,
     * corresponding to the first element of the passed AlgART array.

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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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