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Java > Open Source Codes > com > quadcap > sql > index > Comparator


1 package com.quadcap.sql.index;
2
3 /* Copyright 1997 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.io.IOException JavaDoc;
42
43 import com.quadcap.util.ConfigNumber;
44 import com.quadcap.util.Debug;
45 import com.quadcap.util.Util;
46
47 /**
48  * Generic comparator implementation
49  *
50  * @author Stan Bailes
51  */
52 public class Comparator {
53     public static Comparator compare = new Comparator();
54     
55     public int compare(byte[] a, int aoff, int alen,
56                byte[] b, int boff, int blen)
57     {
58     int ret = Util.compareBytes(a, aoff, alen, b, boff, blen);
59         //#ifdef TRACE
60 if (Trace.bit(4)) {
61         Debug.println(0, "compare(" + Util.strBytes(a, aoff, alen) + ", " +
62               Util.strBytes(b, boff, blen) + ") = " + ret);
63     }
64         //#endif
65 return ret;
66     }
67
68     public int compare(byte[] a, byte[] b) {
69     return compare(a, 0, a.length, b, 0, b.length);
70     }
71
72     public String JavaDoc toString(byte[] key, int off, int len) {
73         return new String JavaDoc(key, off, len);
74     }
75 }
76
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