01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.foundation;
22:
23: class HashtableByteArrayEntry extends HashtableObjectEntry {
24:
25: public HashtableByteArrayEntry(byte[] bytes, Object value) {
26: super (hash(bytes), bytes, value);
27: }
28:
29: public HashtableByteArrayEntry() {
30: super ();
31: }
32:
33: public Object deepClone(Object obj) {
34: return deepCloneInternal(new HashtableByteArrayEntry(), obj);
35: }
36:
37: public boolean hasKey(Object key) {
38: if (key instanceof byte[]) {
39: return areEqual((byte[]) key(), (byte[]) key);
40: }
41: return false;
42: }
43:
44: static int hash(byte[] bytes) {
45: int ret = 0;
46: for (int i = 0; i < bytes.length; i++) {
47: ret = ret * 31 + bytes[i];
48: }
49: return ret;
50: }
51:
52: static boolean areEqual(byte[] lhs, byte[] rhs) {
53: if (rhs.length != lhs.length)
54: return false;
55: for (int i = 0; i < rhs.length; i++) {
56: if (rhs[i] != lhs[i])
57: return false;
58: }
59: return true;
60: }
61: }
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