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1   /*
2    * $Id: IntegerConverter.java,v 1.2 2004/04/04 18:27:45 eelco12 Exp $
3    * $Revision: 1.2 $
4    * $Date: 2004/04/04 18:27:45 $
5    *
6    * ====================================================================
7    * Copyright (c) 2003, Open Edge B.V.
8    * All rights reserved.
9    * Redistribution and use in source and binary forms, with or without 
10   * modification, are permitted provided that the following conditions are met:
11   * Redistributions of source code must retain the above copyright notice, 
12   * this list of conditions and the following disclaimer. Redistributions 
13   * in binary form must reproduce the above copyright notice, this list of 
14   * conditions and the following disclaimer in the documentation and/or other 
15   * materials provided with the distribution. Neither the name of OpenEdge B.V. 
16   * nor the names of its contributors may be used to endorse or promote products 
17   * derived from this software without specific prior written permission.
18   * 
19   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
20   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
21   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
22   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
23   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
24   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
25   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
26   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
27   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
28   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 
29   * THE POSSIBILITY OF SUCH DAMAGE.
30   */
31  package nl.openedge.baritus.converters;
32  
33  /***
34   * <p>{@link Converter} implementation that converts an incoming
35   * String into a <code>java.lang.Integer</code> object, 
36   * throwing a {@link ConversionException} if a conversion
37   * error occurs.</p>
38   *
39   * @author Eelco Hillenius
40   */
41  
42  public final class IntegerConverter implements Converter 
43  {
44  
45      /***
46       * Create a {@link Converter} that will throw a {@link ConversionException}
47       * if a conversion error occurs.
48       */
49      public IntegerConverter() 
50      {
51  
52      }
53  
54      /***
55       * Convert the specified input object into an output object of the
56       * specified type.
57       *
58       * @param type Data type to which this value should be converted
59       * @param value The input value to be converted
60       *
61       * @exception ConversionException if conversion cannot be performed
62       *  successfully
63       */
64      public Object convert(Class type, Object value) 
65      {
66  
67          if (value == null) 
68          {
69              return null;
70          }
71  
72          if (value instanceof Integer) 
73          {
74              return (value);
75          } 
76          else if(value instanceof Number) 
77          {
78              return new Integer(((Number)value).intValue());
79          }
80  
81          try 
82          {
83              return (new Integer(value.toString()));
84          } 
85          catch (Exception e) 
86          {
87  			throw new ConversionException(e);
88          }
89  
90      }
91  
92  
93  }