01: /*
02: * Distributed as part of c3p0 v.0.9.1.2
03: *
04: * Copyright (C) 2005 Machinery For Change, Inc.
05: *
06: * Author: Steve Waldman <swaldman@mchange.com>
07: *
08: * This library is free software; you can redistribute it and/or modify
09: * it under the terms of the GNU Lesser General Public License version 2.1, as
10: * published by the Free Software Foundation.
11: *
12: * This software is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: * GNU Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public License
18: * along with this software; see the file LICENSE. If not, write to the
19: * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20: * Boston, MA 02111-1307, USA.
21: */
22:
23: package com.mchange.v2.c3p0.impl;
24:
25: import com.mchange.v2.coalesce.*;
26:
27: public final class IdentityTokenizedCoalesceChecker implements
28: CoalesceChecker {
29: public static IdentityTokenizedCoalesceChecker INSTANCE = new IdentityTokenizedCoalesceChecker();
30:
31: public boolean checkCoalesce(Object a, Object b) {
32: IdentityTokenized aa = (IdentityTokenized) a;
33: IdentityTokenized bb = (IdentityTokenized) b;
34:
35: String ta = aa.getIdentityToken();
36: String tb = bb.getIdentityToken();
37:
38: if (ta == null || tb == null)
39: throw new NullPointerException(
40: "[c3p0 bug] An IdentityTokenized object has no identity token set?!?! "
41: + (ta == null ? ta : tb));
42: else
43: return ta.equals(tb);
44: }
45:
46: public int coalesceHash(Object a) {
47: String t = ((IdentityTokenized) a).getIdentityToken();
48: return (t != null ? t.hashCode() : 0);
49: }
50:
51: private IdentityTokenizedCoalesceChecker() {
52: }
53: }
|