Java ByteBuffer Compact compact(ByteBuffer[] buffers)

Description

Compacts an array of byte buffers, retaining only the buffers that have remaining data.

License

Open Source License

Parameter

Parameter	Description
buffers	the buffers to compact.

Return

a compacted ByteBuffer array.

Declaration

public static ByteBuffer[] compact(ByteBuffer[] buffers) 

Method Source Code

//package com.java2s;
/*//from  w w w.j a v a  2 s.co m
Copyright (c) 2008-2011 Christoffer Lern?
    
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
    
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
    
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

import java.nio.ByteBuffer;

public class Main {
    /**
     * Compacts an array of byte buffers, retaining only the buffers that have remaining data.
     *
     * @param buffers the buffers to compact.
     * @return a compacted ByteBuffer array.
     */
    public static ByteBuffer[] compact(ByteBuffer[] buffers) {
        for (int i = 0; i < buffers.length; i++) {
            if (buffers[i].remaining() > 0) {
                if (i == 0)
                    return buffers;
                ByteBuffer[] newBuffers = new ByteBuffer[buffers.length - i];
                System.arraycopy(buffers, i, newBuffers, 0, buffers.length - i);
                return newBuffers;
            }
        }
        return null;
    }

    public static long remaining(ByteBuffer[] byteBuffers) {
        long length = 0;
        for (ByteBuffer buffer : byteBuffers)
            length += buffer.remaining();
        return length;
    }
}

Related

1. compact(ByteBuffer buffer)
2. compact(ByteBuffer buffer)
3. compact(ByteBuffer buffer)
4. toCompactArray(ByteBuffer src)