01: /*
02: * ============================================================================
03: * GNU Lesser General Public License
04: * ============================================================================
05: *
06: * JasperReports - Free Java report-generating library.
07: * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
08: *
09: * This library is free software; you can redistribute it and/or
10: * modify it under the terms of the GNU Lesser General Public
11: * License as published by the Free Software Foundation; either
12: * version 2.1 of the License, or (at your option) any later version.
13: *
14: * This library is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17: * Lesser General Public License for more details.
18: *
19: * You should have received a copy of the GNU Lesser General Public
20: * License along with this library; if not, write to the Free Software
21: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22: *
23: * JasperSoft Corporation
24: * 303 Second Street, Suite 450 North
25: * San Francisco, CA 94107
26: * http://www.jaspersoft.com
27: */
28: package net.sf.jasperreports.crosstabs.fill;
29:
30: import java.util.Map;
31:
32: import net.sf.jasperreports.engine.JRException;
33: import net.sf.jasperreports.engine.JRExpression;
34: import net.sf.jasperreports.engine.fill.JREvaluator;
35: import net.sf.jasperreports.engine.fill.JRFillExpressionEvaluator;
36:
37: /**
38: * Expression evaluator used for crosstabs at fill time.
39: *
40: * @author Lucian Chirita (lucianc@users.sourceforge.net)
41: * @version $Id: JRCrosstabExpressionEvaluator.java 1470 2006-11-08 16:07:35Z teodord $
42: */
43: public class JRCrosstabExpressionEvaluator implements
44: JRFillExpressionEvaluator {
45: private final JREvaluator evaluator;
46:
47: public JRCrosstabExpressionEvaluator(JREvaluator evaluator) {
48: this .evaluator = evaluator;
49: }
50:
51: public Object evaluate(JRExpression expression, byte evaluationType)
52: throws JRException {
53: if (evaluationType != JRExpression.EVALUATION_DEFAULT) {
54: throw new JRException(
55: "The crosstab evaluator doesn't support old or estimated expression evaluation.");
56: }
57:
58: return evaluator.evaluate(expression);
59: }
60:
61: public void init(Map parametersMap, Map variablesMap,
62: byte whenResourceMissingType) throws JRException {
63: evaluator.init(parametersMap, null, variablesMap,
64: whenResourceMissingType);
65: }
66: }
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