1 /*
2 Copyright (C) 2004 Grid Systems, S.A.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2, as
6 published by the Free Software Foundation.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 */
17 package com.gridsystems.beanfilter;
18
19 /**
20 * Evaluates a node and negates it.
21 *
22 * @author Rodrigo Ruiz
23 * @author Xmas
24 * @version 1.0
25 */
26 public class NotNode extends EvalNode {
27 /**
28 * The node to negate.
29 */
30 private EvalNode node;
31
32 /**
33 * Creates a new instance.
34 *
35 * @param node The node to negate.
36 */
37 public NotNode(EvalValue node) {
38 super(node.getLinePos(), node.getCharPos());
39 this.node = new BooleanNode(node);
40 }
41
42 /**
43 * {@inheritDoc}
44 */
45 @Override public String toString() {
46 return "NOT " + node.toString();
47 }
48
49 /**
50 * {@inheritDoc}
51 */
52 @Override
53 public boolean eval(Object src) throws EvalException {
54 return node == null ? true : !node.eval(src);
55 }
56 }