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: ColumnAggregationExpression.java 3525 2007-10-16 11:43:48Z 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;
31:
32: import org.jfree.report.DataSourceException;
33:
34: /**
35: * Creation-Date: 04.01.2006, 17:23:01
36: *
37: * @author Thomas Morgner
38: */
39: public abstract class ColumnAggregationExpression extends
40: AbstractExpression {
41: protected ColumnAggregationExpression() {
42: }
43:
44: protected abstract int getFieldListParameterPosition();
45:
46: protected Object[] getFieldValues() throws DataSourceException {
47: return getFieldValues(Object.class);
48: }
49:
50: protected Object[] getFieldValues(final Class type)
51: throws DataSourceException {
52: return null; // todo
53: }
54:
55: }
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