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 * Evaluation tree node.
21 *
22 * @author Rodrigo Ruiz
23 * @author Xmas
24 * @version 1.0
25 */
26 public abstract class EvalNode extends EvalValue {
27
28 /**
29 * Creates a new instance.
30 *
31 * @param linePos The line token position
32 * @param charPos The char token position
33 */
34 public EvalNode(int linePos, int charPos) {
35 super(linePos, charPos);
36 }
37
38
39 /**
40 * {@inheritDoc}
41 */
42 @Override
43 public final Object getValue(Object src) throws EvalException {
44 return eval(src);
45 }
46
47
48 /**
49 * {@inheritDoc}
50 */
51 @Override
52 public final Class<?> getClassValue(Class<?> parentClass) throws EvalException {
53 return Boolean.class;
54 }
55
56 /**
57 * Evaluates the node.
58 *
59 * @param src Data source, for dynamic nodes
60 * @return <code>true</code> if src makes true the node
61 * @throws EvalException If an error occurs
62 */
63 public abstract boolean eval(Object src) throws EvalException;
64 }