KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > mchange > v2 > coalesce > AbstractStrongCoalescer


1 /*
2  * Distributed as part of c3p0 v.0.9.1
3  *
4  * Copyright (C) 2005 Machinery For Change, Inc.
5  *
6  * Author: Steve Waldman <swaldman@mchange.com>
7  *
8  * This library is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU Lesser General Public License version 2.1, as
10  * published by the Free Software Foundation.
11  *
12  * This software is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with this software; see the file LICENSE. If not, write to the
19  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20  * Boston, MA 02111-1307, USA.
21  */
22
23
24 package com.mchange.v2.coalesce;
25
26 import java.util.*;
27
28 class AbstractStrongCoalescer implements Coalescer
29 {
30     Map coalesced;
31
32     AbstractStrongCoalescer( Map coalesced )
33     { this.coalesced = coalesced; }
34
35     public Object JavaDoc coalesce( Object JavaDoc o )
36     {
37     Object JavaDoc out = coalesced.get( o );
38     if ( out == null )
39         {
40         coalesced.put( o , o );
41         out = o;
42         }
43     return out;
44     }
45
46     public int countCoalesced()
47     { return coalesced.size(); }
48
49     public Iterator iterator()
50     { return new CoalescerIterator( coalesced.keySet().iterator() ); }
51 }
52
53
54
55
Popular Tags