TDoubleHashingStrategy


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: TDoubleHashingStrategy.java,v 1.4 2004/11/09 15:48:46 ericdf Exp $
32   */
33  
34  public interface TDoubleHashingStrategy extends Serializable {
35      /**
36       * Computes a hash code for the specified double.  Implementors
37       * can use the double's own value or a custom scheme designed to
38       * minimize collisions for a known set of input.
39       * 
40       * @param double for which the hashcode is to be computed
41       * @return the hashCode
42       */
43      public int computeHashCode(double val);
44  } // TDoubleHashingStrategy
45
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