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.charts;
29:
30: import net.sf.jasperreports.engine.JRChartDataset;
31: import net.sf.jasperreports.engine.JRExpression;
32:
33: /**
34: * This class represents a dataset that consists of a single
35: * value. It is used by Meter and Thermometer charts, which
36: * plot a single value against a range.
37: *
38: * @author Barry Klawans (bklawans@users.sourceforge.net)
39: * @version $Id: JRValueDataset.java 1385 2006-09-05 21:29:03Z bklawans $
40: */
41: public interface JRValueDataset extends JRChartDataset {
42:
43: /**
44: * Returns the expression that indicates the value held
45: * by this dataset.
46: *
47: * @return the expression that indicates the value held by
48: * this dataset
49: */
50: public JRExpression getValueExpression();
51:
52: }
|