Source for org.jfree.report.util.DataSetUtility

   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: DataSetUtility.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.util;
  32: 
  33: import org.jfree.report.DataSet;
  34: import org.jfree.report.DataSourceException;
  35: import org.jfree.util.ObjectUtilities;
  36: 
  37: /**
  38:  * Creation-Date: 17.04.2006, 11:43:04
  39:  *
  40:  * @author Thomas Morgner
  41:  */
  42: public class DataSetUtility
  43: {
  44:   private DataSetUtility()
  45:   {
  46:   }
  47: 
  48:   public static Object getByName (final DataSet ds, final String column)
  49:           throws DataSourceException
  50:   {
  51:     return getByName(ds, column, null);
  52:   }
  53: 
  54:   public static Object getByName (final DataSet ds, final String column, final Object defaultVal)
  55:           throws DataSourceException
  56:   {
  57:     final int size = ds.getColumnCount();
  58:     for (int i = 0; i < size; i++)
  59:     {
  60:       final String columnName = ds.getColumnName(i);
  61:       if (ObjectUtilities.equal(column, columnName))
  62:       {
  63:         return ds.get(i);
  64:       }
  65:     }
  66:     return defaultVal;
  67:   }
  68: 
  69: 
  70:   public static boolean isColumnDefined (final String name, final DataSet params)
  71:           throws DataSourceException
  72:   {
  73:     final int size = params.getColumnCount();
  74:     for (int i = 0; i < size; i++)
  75:     {
  76:       final String columnName = params.getColumnName(i);
  77:       if (ObjectUtilities.equal(name, columnName))
  78:       {
  79:         return true;
  80:       }
  81:     }
  82:     return false;
  83:   }
  84: 
  85: }