Source for org.jfree.report.EmptyReportData

   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: EmptyReportData.java 2890 2007-06-10 15:54:22Z taqua $
  27:  * ------------
  28:  * (C) Copyright 2000-2005, by Object Refinery Limited.
  29:  * (C) Copyright 2005-2007, by Pentaho Corporation.
  30:  */
  31: package org.jfree.report;
  32: 
  33: /**
  34:  * Creation-Date: 22.04.2006, 14:25:04
  35:  *
  36:  * @author Thomas Morgner
  37:  */
  38: public class EmptyReportData implements ReportData
  39: {
  40:   public EmptyReportData()
  41:   {
  42:   }
  43: 
  44:   public int getCursorPosition() throws DataSourceException
  45:   {
  46:     return 0;
  47:   }
  48: 
  49:   public boolean isReadable() throws DataSourceException
  50:   {
  51:     return false;
  52:   }
  53: 
  54:   public boolean setCursorPosition(final int cursor) throws DataSourceException
  55:   {
  56:     if (cursor == ReportData.BEFORE_FIRST_ROW)
  57:     {
  58:       return true;
  59:     }
  60:     return false;
  61:   }
  62: 
  63:   /**
  64:    * This operation checks, whether a call to next will be likely to succeed. If there is a next data row, this should
  65:    * return true.
  66:    *
  67:    * @return
  68:    * @throws DataSourceException
  69:    *
  70:    */
  71:   public boolean isAdvanceable() throws DataSourceException
  72:   {
  73:     return false;
  74:   }
  75: 
  76:   public boolean next() throws DataSourceException
  77:   {
  78:     return false;
  79:   }
  80: 
  81:   public void close() throws DataSourceException
  82:   {
  83: 
  84:   }
  85: 
  86:   public int getColumnCount() throws DataSourceException
  87:   {
  88:     return 0;
  89:   }
  90: 
  91:   public String getColumnName(final int column) throws DataSourceException
  92:   {
  93:     return null;
  94:   }
  95: 
  96:   public Object get(final int column) throws DataSourceException
  97:   {
  98:     return null;
  99:   }
 100: }