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1: /** 2: * ======================================== 3: * JFreeReport : a free Java report library 4: * ======================================== 5: * 6: * Project Info: http://reporting.pentaho.org/ 7: * 8: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 9: * 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: */ 31: package org.jfree.report.expressions; 32: 33: import org.jfree.report.DataSourceException; 34: 35: /** 36: * Creation-Date: 04.01.2006, 17:23:01 37: * 38: * @author Thomas Morgner 39: */ 40: public abstract class ColumnAggregationExpression extends AbstractExpression 41: { 42: protected ColumnAggregationExpression() 43: { 44: } 45: 46: protected abstract int getFieldListParameterPosition(); 47: 48: protected Object[] getFieldValues() throws DataSourceException 49: { 50: return getFieldValues(Object.class); 51: } 52: 53: protected Object[] getFieldValues(final Class type) throws DataSourceException 54: { 55: return null; // todo 56: } 57: 58: }