1 /*
2 Copyright (C) 2006 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 * Object field value. It gets its value by introspection of the data source.
21 *
22 * @author Xmas
23 * @version 1.0
24 */
25 public class FieldValue extends EvalValue {
26
27 /**
28 * EvalValue base.
29 */
30 private EvalValue base;
31
32 /**
33 * Field value.
34 */
35 private EvalValue field;
36
37 /**
38 * Creates a new instance.
39 *
40 * @param token The token
41 * @param base Left part of the field
42 * @param field Right part of the field.
43 */
44 public FieldValue(Token token, EvalValue base, EvalValue field) {
45 super(token.beginLine, token.beginColumn);
46 this.base = base;
47 this.field = field;
48 }
49
50 /**
51 * {@inheritDoc}
52 */
53 @Override public Object getValue(Object src) throws EvalException {
54 Object parentValues = base.getValue(src);
55 return field.getValue(parentValues);
56 }
57
58 /**
59 * {@inheritDoc}
60 */
61 @Override public String toString() {
62 return base + "." + field;
63 }
64
65 /**
66 * {@inheritDoc}
67 */
68 @Override
69 public Class<?> getClassValue(Class<?> parentClass) throws EvalException {
70 Class<?> baseClass = base.getClassValue(parentClass);
71 return field.getClassValue(baseClass);
72 }
73
74 }