Source for org.jfree.report.util.beans.BigIntegerValueConverter

   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: BigIntegerValueConverter.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: package org.jfree.report.util.beans;
  32: 
  33: import java.math.BigInteger;
  34: 
  35: /**
  36:  * A class that handles the conversion of {@link java.math.BigInteger} attributes to and
  37:  * from their {@link String} representation.
  38:  *
  39:  * @author Thomas Morgner
  40:  */
  41: public class BigIntegerValueConverter implements ValueConverter
  42: {
  43: 
  44:   /**
  45:    * Creates a new value converter.
  46:    */
  47:   public BigIntegerValueConverter ()
  48:   {
  49:     super();
  50:   }
  51: 
  52:   /**
  53:    * Converts the attribute to a string.
  54:    *
  55:    * @param o the attribute ({@link java.math.BigInteger} expected).
  56:    * @return A string representing the {@link java.math.BigInteger} value.
  57:    */
  58:   public String toAttributeValue (final Object o)
  59:   {
  60:     if (o instanceof Integer)
  61:     {
  62:       return o.toString();
  63:     }
  64:     throw new ClassCastException("Give me a real type.");
  65:   }
  66: 
  67:   /**
  68:    * Converts a string to a {@link java.math.BigInteger}.
  69:    *
  70:    * @param s the string.
  71:    * @return a {@link java.math.BigInteger}.
  72:    */
  73:   public Object toPropertyValue (final String s)
  74:   {
  75:     return new BigInteger(s);
  76:   }
  77: }