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 */
9package com.vladium.util;
10
11// ----------------------------------------------------------------------------
12/**
13 * @author Vlad Roubtsov, (C) 2003
14 */
15public
16abstract class IntegerFactory
17{
18    // public: ................................................................
19
20    // TODO: use thread-local arena pattern to avoid synchronization ?
21
22    public static Integer getInteger (final int value)
23    {
24        synchronized (s_values)
25        {
26            final Object _result = s_values.get (value);
27
28            if (_result == null)
29            {
30                final Integer result = new Integer (value);
31                s_values.put (value, result);
32
33                return result;
34            }
35
36            return (Integer) _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// ----------------------------------------------------------------------------