FloatPkFieldMapping


1   /**
2    * JOnAS: Java(TM) Open Application Server
3    * Copyright (C) 2004 Bull S.A.
4    * Contact: jonas-team@objectweb.org
5    *
6    * This library is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public
8    * License as published by the Free Software Foundation; either
9    * version 2.1 of the License, or any later version.
10   *
11   * This library is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   * Lesser General Public License for more details.
15   *
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this library; if not, write to the Free Software
18   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
19   * USA
20   *
21   * --------------------------------------------------------------------------
22   * $Id: FloatPkFieldMapping.java,v 1.2 2004/09/17 08:25:02 joaninh Exp $
23   * --------------------------------------------------------------------------
24   */
25  package org.objectweb.jonas_ejb.lib;
26  
27  
28  /**
29   * Conversion java.lang.Float <-> java.lang.String. <br>
30   * This conversion is useful only for primary key field because JORM does not support float as primary key field.
31   * The StorageType is the JORM type, and the MemoryType is the JOnAS type (bean field type).
32   * @author Helene Joanin
33   */
34  public class FloatPkFieldMapping {
35  
36      /**
37       * Retrieves the java type corresponding to the type into the data support.
38       * @return a Class object (never null).
39       */
40      public static Class   getStorageType() {
41          return String  .class;
42      }
43  
44      /**
45       * Retrieves the java type corresponding to the type in memory.
46       * @return a Class object (never null).
47       */
48      public static Class   getMemoryType() {
49          return Float  .class;
50      }
51  
52      /**
53       * Converts a value from the data support into a value in memory
54       * @param storagevalue is the value store in the support (can be null).
55       * @return the value in memory (can be null).
56       */
57      public static Object   toMemory(Object   storagevalue) {
58          if (storagevalue == null) {
59              return null;
60          }
61          return (storagevalue instanceof Float   ? storagevalue : new Float  ((String  ) storagevalue));
62      }
63  
64      /**
65       * Converts a value from the data support into a value in memory
66       * @param memoryvalue the value in memory (can be null).
67       * @return is the value store in the support (can be null).
68       */
69      public static Object   toStorage(Object   memoryvalue) {
70          return memoryvalue.toString();
71      }
72  }
73  
74
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