Java ByteBuffer to Long Array getLong(ByteBuffer in)

Description

Get a long integer from the byte buffer.

License

Open Source License

Parameter

Parameter	Description
in	The input buffer.

Exception

Parameter	Description
BufferUnderflowException	If there are not enough bytes inthe buffer.

Return

The long integer.

Declaration

public static long getLong(ByteBuffer in) 

Method Source Code

//package com.java2s;
/* vim:set softtabstop=3 shiftwidth=3 tabstop=3 expandtab tw=72:
$Id: BufferUtil.java,v 1.2 2003/04/05 15:25:37 rsdio Exp $
    //from  w ww .  j  a  v  a 2s.com
BufferUtil: static methods for reading from a ByteBuffer.
Copyright (C) 2003  Casey Marshall <rsdio@metastatic.org>
    
This file is a part of Jarsync.
    
Jarsync 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; either version 2 of the License, or
(at your option) any later version.
    
Jarsync 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 Jarsync; if not, write to the
    
   Free Software Foundation, Inc.,
   59 Temple Place, Suite 330,
   Boston, MA  02111-1307
   USA  */

import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;

public class Main {
    /**
     * Get a long integer from the byte buffer. The semantics of the
     * integer read are as follows:
     *
     * <ul>
     * <li>If the first four bytes do not equal the integer
     * <tt>0xFFFFFFFF</tt>, return these four bytes, and don't read
     * anything else.</li>
     * <li>Otherwise, read eight more bytes and return that as the long
     * integer.</li>
     * </ul>
     *
     * @param in The input buffer.
     * @return The long integer.
     * @throws BufferUnderflowException If there are not enough bytes in
     *   the buffer.
     */
    public static long getLong(ByteBuffer in) {
        int i = in.getInt();
        if (i != 0xFFFFFFFF)
            return i;
        try {
            return in.getLong();
        } catch (BufferUnderflowException bue) {
            in.position(in.position() - 4);
            throw bue;
        }
    }
}

Related

1. deserializeLongArray(ByteBuffer buffer)
2. getLong(ByteBuffer buffer)
3. getLong(ByteBuffer byteBuffer, int longIndex)
4. getLong(ByteBuffer longCalculator, byte[] bytes)
5. getLongB(ByteBuffer bb, int index)
6. getLongBE(ByteBuffer b, int start, int end)
7. getLongByteBuffer(long id)