Java ByteBuffer to Byte Array getBytes(ByteBuffer buf)

Description

Return the data in the buffer.

License

Open Source License

Declaration

public static byte[] getBytes(ByteBuffer buf) 

Method Source Code

//package com.java2s;
/**//w w w .  j  a  va 2 s. c o m
    
Copyright (C) SYSTAP, LLC 2006-2007.  All rights reserved.
    
Contact:
 SYSTAP, LLC
 4501 Tower Road
 Greensboro, NC 27410
 licenses@bigdata.com
    
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

import java.nio.ByteBuffer;

public class Main {
    /**
     * Return the data in the buffer. When possible, the backing array is
     * returned. Otherwise, a new byte[] is allocated, the data are copied into
     * the array, and the new array is returned.
     */
    public static byte[] getBytes(ByteBuffer buf) {

        if (buf.hasArray() && buf.arrayOffset() == 0 && buf.position() == 0 && buf.limit() == buf.capacity()) {

            /*
             * Return the backing array.
             */

            return buf.array();

        }

        /*
         * Copy the expected data into a byte[] using a read-only view on the
         * buffer so that we do not mess with its position, mark, or limit.
         */
        final byte[] a;
        {

            buf = buf.asReadOnlyBuffer();

            final int len = buf.remaining();

            a = new byte[len];

            buf.get(a);

        }

        return a;

    }
}

Related

1. getByteArray(ByteBuffer byteBuffer)
2. getByteArray(final ByteBuffer buff)
3. getByteArrayFromBuffer(ByteBuffer byteBuf)
4. getByteArrayFromByteBuffer(ByteBuffer content)
5. getBytes(ByteBuffer bb)
6. getBytes(ByteBuffer buf)
7. getBytes(ByteBuffer buf, byte[] arr)
8. getBytes(ByteBuffer buf, int length)
9. getBytes(ByteBuffer buffer, int len)