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Java > Open Source Codes > com > vladium > util > IntegerFactory


1 /* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
2  *
3  * This program and the accompanying materials are made available under
4  * the terms of the Common Public License v1.0 which accompanies this distribution,
5  * and is available at http://www.eclipse.org/legal/cpl-v10.html
6  *
7  * $Id: IntegerFactory.java,v 1.1.1.1 2004/05/09 16:57:52 vlad_r Exp $
8  */
9 package com.vladium.util;
10
11 // ----------------------------------------------------------------------------
12 /**
13  * @author Vlad Roubtsov, (C) 2003
14  */
15 public
16 abstract class IntegerFactory
17 {
18     // public: ................................................................
19
20     // TODO: use thread-local arena pattern to avoid synchronization ?
21
22     public static Integer JavaDoc getInteger (final int value)
23     {
24         synchronized (s_values)
25         {
26             final Object JavaDoc _result = s_values.get (value);
27             
28             if (_result == null)
29             {
30                 final Integer JavaDoc result = new Integer JavaDoc (value);
31                 s_values.put (value, result);
32                 
33                 return result;
34             }
35             
36             return (Integer JavaDoc) _result;
37         }
38     }
39     
40     // protected: .............................................................
41
42     // package: ...............................................................
43
44     // private: ...............................................................
45
46     
47     private IntegerFactory () {} // prevent subclassing
48
49     
50     private static final IntObjectMap s_values = new IntObjectMap (16661);
51
52 } // end of class
53 // ----------------------------------------------------------------------------
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