ComparableComparator


1   // ============================================================================
2   // $Id: ComparableComparator.java,v 1.11 2005/08/02 23:45:22 davidahall Exp $
3   // Copyright (c) 2003-2005  David A. Hall
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32  
33  package net.sf.jga.util;
34  
35  import java.io.Serializable  ;
36  import java.lang.Comparable  ;
37  import java.util.Comparator  ;
38  
39  /**
40   * Comparator used for objects that extend Comparable.  It delegates to the
41   * object's Comparable interface of the object whose class is &quot;least&quot;
42   * derived; ie, if the first object's class is a subclass of the second object's
43   * class, then the second object's comparable interface is used; otherwise the
44   * first object's comparable interface is used.
45   *
46   * @author <a HREF="mailto:davidahall@users.sf.net">David A. Hall</a>
47   */
48  
49  public class ComparableComparator<T extends Comparable  /*@*/<? super T>/*@*/>
50      implements Comparator  <T>, Serializable  
51  {
52      static final long serialVersionUID = -3155796069331714963L;
53  
54      public int compare(T x, T y) {
55              return x.compareTo(y);
56     }
57  }
58
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