1 | /* |
2 | Copyright (C) 2002-2004 MySQL AB |
3 | |
4 | This program is free software; you can redistribute it and/or modify |
5 | it under the terms of version 2 of the GNU General Public License as |
6 | published by the Free Software Foundation. |
7 | |
8 | There are special exceptions to the terms and conditions of the GPL |
9 | as it is applied to this software. View the full text of the |
10 | exception in file EXCEPTIONS-CONNECTOR-J in the directory of this |
11 | software distribution. |
12 | |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | GNU General Public License for more details. |
17 | |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software |
20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 | |
22 | |
23 | |
24 | */ |
25 | package com.mysql.jdbc.util; |
26 | |
27 | import java.util.LinkedHashMap; |
28 | import java.util.Map.Entry; |
29 | |
30 | /** |
31 | * @author Mark Matthews |
32 | * @version $Id: LRUCache.java 3726 2005-05-19 15:52:24Z mmatthews $ |
33 | */ |
34 | public class LRUCache extends LinkedHashMap { |
35 | protected int maxElements; |
36 | |
37 | public LRUCache(int maxSize) { |
38 | super(maxSize); |
39 | this.maxElements = maxSize; |
40 | } |
41 | |
42 | /* |
43 | * (non-Javadoc) |
44 | * |
45 | * @see java.util.LinkedHashMap#removeEldestEntry(java.util.Map.Entry) |
46 | */ |
47 | protected boolean removeEldestEntry(Entry eldest) { |
48 | return (size() > this.maxElements); |
49 | } |
50 | } |