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,v 1.8 2007/06/10 15:54:21 taqua Exp $
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 }