DoubleTypeHandler


1   /*
2    * The contents of this file are subject to the Sapient Public License
3    * Version 1.0 (the "License"); you may not use this file except in compliance
4    * with the License. You may obtain a copy of the License at
5    * http://carbon.sf.net/License.html.
6    *
7    * Software distributed under the License is distributed on an "AS IS" basis,
8    * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
9    * the specific language governing rights and limitations under the License.
10   *
11   * The Original Code is The Carbon Component Framework.
12   *
13   * The Initial Developer of the Original Code is Sapient Corporation
14   *
15   * Copyright (C) 2003 Sapient Corporation. All Rights Reserved.
16   */
17  
18  package org.sape.carbon.core.config.type.handlers;
19  
20  
21  import org.sape.carbon.core.config.type.ConfigurationTypeHandler;
22  import org.sape.carbon.core.config.type.TypeConversionException;
23  
24  
25  /**
26   * <P>Parses and formats between Strings and Doubles.</P>
27   *
28   * Copyright 2002 Sapient
29   * @since carbon 1.0
30   * @author Greg Hinkle, January 2002
31   * @version $Revision: 1.11 $($Author: dvoet $ / $Date: 2003/05/05 21:21:20 $)
32   */
33  public class DoubleTypeHandler implements ConfigurationTypeHandler {
34  
35      /**
36       * <P>Parses a string into a Double object.</P>
37       *
38       * @param stringValue the String representation of the requested Double
39       * @param type String
40       * @return Double version of the String
41       * @throws TypeConversionException when the string does not represent
42       *   a valid Double
43       */
44      public Object   toObject(Class   type, String   stringValue)
45      throws TypeConversionException {
46  
47          Double   object = null;
48          try {
49              object = Double.valueOf(stringValue);
50          } catch (NumberFormatException   nfe) {
51              throw new TypeConversionException(
52                  this.getClass(),
53                      "Couldn't format", nfe);
54          } catch (NullPointerException   npe) {
55              throw new TypeConversionException(
56                  this.getClass(),
57                      "Couldn't format", npe);
58          }
59          return object;
60      }
61  
62      /**
63       * <P>Formats an Double into a String value.</P>
64       *
65       * @param objectValue the Double to be formatted
66       * @return String value of the Double
67       * @throws ClassCastException when past an object other than a Double
68       */
69      public String   toString(Object   objectValue) {
70          return ((Double  ) objectValue).toString();
71      }
72  
73  }
74
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