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.encounter;
24:
25: import java.util.Map;
26:
27: class AbstractEncounterCounter implements EncounterCounter {
28: final static Long ONE = new Long(1);
29: Map m;
30:
31: AbstractEncounterCounter(Map m) {
32: this .m = m;
33: }
34:
35: /**
36: * @return how many times have I seen this object before?
37: */
38: public long encounter(Object o) {
39: Long oldLong = (Long) m.get(o);
40: Long newLong;
41: long out;
42: if (oldLong == null) {
43: out = 0;
44: newLong = ONE;
45: } else {
46: out = oldLong.longValue();
47: newLong = new Long(out + 1);
48: }
49: m.put(o, newLong);
50: return out;
51: }
52: }
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