1 /*
2 * JasperReports - Free Java Reporting Library.
3 * Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
4 * http://www.jaspersoft.com
5 *
6 * Unless you have purchased a commercial license agreement from Jaspersoft,
7 * the following license terms apply:
8 *
9 * This program is part of JasperReports.
10 *
11 * JasperReports is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * JasperReports is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
23 */
24 package net.sf.jasperreports.compilers;
25
26 import java.io.Serializable;
27
28 import net.sf.jasperreports.engine.JRConstants;
29
30 /**
31 * @author Lucian Chirita (lucianc@users.sourceforge.net)
32 */
33 public class ConstantExpressionEvaluation implements DirectExpressionEvaluation, Serializable
34 {
35
36 private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
37
38 private static ConstantExpressionEvaluation NULL_EVALUATION = new ConstantExpressionEvaluation(null);
39
40 public static ConstantExpressionEvaluation nullEvaluation()
41 {
42 return NULL_EVALUATION;
43 }
44
45 private final Object value;
46
47 public ConstantExpressionEvaluation(Object value)
48 {
49 this.value = value;
50 }
51
52 @Override
53 public EvaluationType getType()
54 {
55 return EvaluationType.CONSTANT;
56 }
57
58 public Object getValue()
59 {
60 return value;
61 }
62
63 }
64