001 /** 002 * ======================================== 003 * JFreeReport : a free Java report library 004 * ======================================== 005 * 006 * Project Info: http://reporting.pentaho.org/ 007 * 008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 009 * 010 * This library is free software; you can redistribute it and/or modify it under the terms 011 * of the GNU Lesser General Public License as published by the Free Software Foundation; 012 * either version 2.1 of the License, or (at your option) any later version. 013 * 014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 016 * See the GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public License along with this 019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 020 * Boston, MA 02111-1307, USA. 021 * 022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 023 * in the United States and other countries.] 024 * 025 * ------------ 026 * $Id: EmptyReportData.java 3048 2007-07-28 18:02:42Z tmorgner $ 027 * ------------ 028 * (C) Copyright 2000-2005, by Object Refinery Limited. 029 * (C) Copyright 2005-2007, by Pentaho Corporation. 030 */ 031 package org.jfree.report; 032 033 /** 034 * Creation-Date: 22.04.2006, 14:25:04 035 * 036 * @author Thomas Morgner 037 */ 038 public class EmptyReportData implements ReportData 039 { 040 public EmptyReportData() 041 { 042 } 043 044 public int getCursorPosition() throws DataSourceException 045 { 046 return 0; 047 } 048 049 public boolean isReadable() throws DataSourceException 050 { 051 return false; 052 } 053 054 public boolean setCursorPosition(final int cursor) throws DataSourceException 055 { 056 if (cursor == ReportData.BEFORE_FIRST_ROW) 057 { 058 return true; 059 } 060 return false; 061 } 062 063 /** 064 * This operation checks, whether a call to next will be likely to succeed. If there is a next data row, this should 065 * return true. 066 * 067 * @return 068 * @throws DataSourceException 069 * 070 */ 071 public boolean isAdvanceable() throws DataSourceException 072 { 073 return false; 074 } 075 076 public boolean next() throws DataSourceException 077 { 078 return false; 079 } 080 081 public void close() throws DataSourceException 082 { 083 084 } 085 086 public int getColumnCount() throws DataSourceException 087 { 088 return 0; 089 } 090 091 public String getColumnName(final int column) throws DataSourceException 092 { 093 return null; 094 } 095 096 public Object get(final int column) throws DataSourceException 097 { 098 return null; 099 } 100 }