01: /**
02: * ========================================
03: * JFreeReport : a free Java report library
04: * ========================================
05: *
06: * Project Info: http://reporting.pentaho.org/
07: *
08: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
09: *
10: * This library is free software; you can redistribute it and/or modify it under the terms
11: * of the GNU Lesser General Public License as published by the Free Software Foundation;
12: * either 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, but WITHOUT ANY WARRANTY;
15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16: * See the GNU Lesser General Public License for more details.
17: *
18: * You should have received a copy of the GNU Lesser General Public License along with this
19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20: * Boston, MA 02111-1307, USA.
21: *
22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
23: * in the United States and other countries.]
24: *
25: * ------------
26: * $Id: GetValueExpression.java 3048 2007-07-28 18:02:42Z tmorgner $
27: * ------------
28: * (C) Copyright 2000-2005, by Object Refinery Limited.
29: * (C) Copyright 2005-2007, by Pentaho Corporation.
30: */package org.jfree.report.expressions.sys;
31:
32: import org.jfree.report.DataSourceException;
33: import org.jfree.report.expressions.AbstractExpression;
34:
35: /**
36: * Creation-Date: 02.12.2006, 22:07:57
37: *
38: * @author Thomas Morgner
39: */
40: public class GetValueExpression extends AbstractExpression {
41: private String field;
42:
43: public GetValueExpression() {
44: }
45:
46: public GetValueExpression(final String field) {
47: this .field = field;
48: }
49:
50: public String getField() {
51: return field;
52: }
53:
54: public void setField(final String field) {
55: this .field = field;
56: }
57:
58: /**
59: * Return the current expression value. <P> The value depends (obviously) on
60: * the expression implementation.
61: *
62: * @return the value of the function.
63: */
64: public Object computeValue() throws DataSourceException {
65: return getDataRow().get(getField());
66: }
67: }
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