/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.db.index;
/**
* Compares two long keys.
*/
public class LongKeyCompare extends KeyCompare {
/**
* Compares the key to the block data.
*/
@Override
public int compare(byte []keyBuffer, int keyOffset,
byte []block, int offset, int length)
{
long key = (((keyBuffer[keyOffset + 0] & 0xffL) << 56)
+ ((keyBuffer[keyOffset + 1] & 0xffL) << 48)
+ ((keyBuffer[keyOffset + 2] & 0xffL) << 40)
+ ((keyBuffer[keyOffset + 3] & 0xffL) << 32)
+ ((keyBuffer[keyOffset + 4] & 0xffL) << 24)
+ ((keyBuffer[keyOffset + 5] & 0xffL) << 16)
+ ((keyBuffer[keyOffset + 6] & 0xffL) << 8)
+ ((keyBuffer[keyOffset + 7] & 0xffL) << 0));
long value = (((block[offset + 0] & 0xffL) << 56)
+ ((block[offset + 1] & 0xffL) << 48)
+ ((block[offset + 2] & 0xffL) << 40)
+ ((block[offset + 3] & 0xffL) << 32)
+ ((block[offset + 4] & 0xffL) << 24)
+ ((block[offset + 5] & 0xffL) << 16)
+ ((block[offset + 6] & 0xffL) << 8)
+ ((block[offset + 7] & 0xffL) << 0));
if (key == value)
return 0;
else if (key < value)
return -1;
else
return 1;
}
/**
* Compares the key to the block data.
*/
@Override
public String toString(byte []keyBuffer, int keyOffset, int length)
{
long key = (((keyBuffer[keyOffset + 0] & 0xffL) << 56) +
((keyBuffer[keyOffset + 1] & 0xffL) << 48) +
((keyBuffer[keyOffset + 2] & 0xffL) << 40) +
((keyBuffer[keyOffset + 3] & 0xffL) << 32) +
((keyBuffer[keyOffset + 4] & 0xffL) << 24) +
((keyBuffer[keyOffset + 5] & 0xffL) << 16) +
((keyBuffer[keyOffset + 6] & 0xffL) << 8) +
((keyBuffer[keyOffset + 7] & 0xffL) << 0));
return String.valueOf(key);
}
}