01: /*
02: * hammurapi-rules @mesopotamia.version@
03: * Hammurapi rules engine.
04: * Copyright (C) 2005 Hammurapi Group
05: *
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2 of the License, or (at your option) any later version.
10: *
11: * This program is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19: *
20: * URL: http://http://www.hammurapi.biz
21: * e-Mail: support@hammurapi.biz
22: */
23: package biz.hammurapi.rules;
24:
25: /**
26: * Negates the object passed to the constructor. Uses == to compare identity.
27: * @author Pavel Vlasov
28: * @revision $Revision$
29: */
30: public class IdentityNegator implements Negator {
31:
32: private String msg;
33: private Object obj;
34:
35: /**
36: * @param obj Object to be negated.
37: */
38: public IdentityNegator(Object obj) {
39: super ();
40: this .obj = obj;
41: }
42:
43: /**
44: * @param obj Object to be negated.
45: * @param msg Message why the object was negated.
46: */
47: public IdentityNegator(Object obj, String msg) {
48: this (obj);
49: this .msg = msg;
50: }
51:
52: public boolean negates(Object obj) {
53: return this .obj == obj;
54: }
55:
56: /**
57: * @return Message why object was negated.
58: */
59: public String getMessage() {
60: return msg;
61: }
62: }
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