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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: ExpressionSlot.java 2725 2007-04-01 18:49:29Z taqua $ 27: * ------------ 28: * (C) Copyright 2000-2005, by Object Refinery Limited. 29: * (C) Copyright 2005-2007, by Pentaho Corporation. 30: */ 31: 32: package org.jfree.report.data; 33: 34: import org.jfree.report.DataRow; 35: import org.jfree.report.DataSourceException; 36: import org.jfree.util.PublicCloneable; 37: 38: /** 39: * Creation-Date: 25.11.2006, 15:18:42 40: * 41: * @author Thomas Morgner 42: */ 43: public interface ExpressionSlot extends PublicCloneable 44: { 45: public Object getValue() throws DataSourceException; 46: 47: public void advance() throws DataSourceException; 48: 49: public void updateDataRow (DataRow dataRow); 50: 51: public String getName(); 52: 53: public boolean isDeepTraversing(); 54: 55: public boolean isPreserve(); 56: }