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Java > Open Source Codes > gnu > trove > TLongHashingStrategy


1 ///////////////////////////////////////////////////////////////////////////////
2 // Copyright (c) 2002, Eric D. Friedman All Rights Reserved.
3 //
4 // This library is free software; you can redistribute it and/or
5 // modify it under the terms of the GNU Lesser General Public
6 // License as published by the Free Software Foundation; either
7 // version 2.1 of the License, or (at your option) any later version.
8 //
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13 //
14 // You should have received a copy of the GNU Lesser General Public
15 // License along with this program; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 ///////////////////////////////////////////////////////////////////////////////
18
19 package gnu.trove;
20
21 import java.io.Serializable;
22
23 /**
24  * Interface to support pluggable hashing strategies in maps and sets.
25  * Implementors can use this interface to make the trove hashing
26  * algorithms use an optimal strategy when computing hashcodes.
27  *
28  * Created: Sun Nov 4 08:56:06 2001
29  *
30  * @author Eric D. Friedman
31  * @version $Id: TLongHashingStrategy.java,v 1.4 2004/11/09 15:48:47 ericdf Exp $
32  */
33
34 public interface TLongHashingStrategy extends Serializable {
35     /**
36      * Computes a hash code for the specified long. Implementors
37      * can use the long's own value or a custom scheme designed to
38      * minimize collisions for a known set of input.
39      *
40      * @param long for which the hashcode is to be computed
41      * @return the hashCode
42      */
43     public int computeHashCode(long val);
44 } // TLongHashingStrategy
45
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