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 /**
27 * @author Lucian Chirita (lucianc@users.sourceforge.net)
28 */
29 public class JavaDirectExpressionValueFilter implements DirectExpressionValueFilter
30 {
31
32 private static final JavaDirectExpressionValueFilter INSTANCE = new JavaDirectExpressionValueFilter();
33
34 public static final JavaDirectExpressionValueFilter instance()
35 {
36 return INSTANCE;
37 }
38
39 @Override
40 public Object filterValue(Object value, Class<?> expectedType)
41 {
42 Object filteredValue;
43 if (expectedType != null && value != null)
44 {
45 //parameter/field/variable values are cast to the declared type in Java compiled expressions
46 //performing the same check here to preserve the behavior
47 filteredValue = expectedType.cast(value);
48 }
49 else
50 {
51 filteredValue = value;
52 }
53 return filteredValue;
54 }
55
56 }
57