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: import javax.rules.Handle;
26:
27: /**
28: * Negates object whose handles are equal to handle of the object passed to the constructor.
29: * @author Pavel Vlasov
30: * @revision $Revision$
31: */
32: public class ObjectNegator implements Negator {
33: private Handle handle;
34: private HandleManager handleManager;
35: private String message;
36:
37: /**
38: * @param manager Handle manager.
39: * @param obj Object to be negated.
40: * @param message Informational message.
41: */
42: public ObjectNegator(HandleManager manager, Object obj,
43: String message) {
44: super ();
45: handleManager = manager;
46: this .handle = manager.addObject(obj);
47: this .message = message;
48: }
49:
50: public boolean negates(Object obj) {
51: return handle.equals(handleManager.addObject(obj));
52: }
53:
54: public String getMessage() {
55: return message;
56: }
57:
58: public String toString() {
59: return message;
60: }
61: }
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