01: // ============================================================================
02: // $Id: ComparableComparator.java,v 1.11 2005/08/02 23:45:22 davidahall Exp $
03: // Copyright (c) 2003-2005 David A. Hall
04: // ============================================================================
05: // The contents of this file are subject to the Common Development and
06: // Distribution License (CDDL), Version 1.0 (the License); you may not use this
07: // file except in compliance with the License. You should have received a copy
08: // of the the License along with this file: if not, a copy of the License is
09: // available from Sun Microsystems, Inc.
10: //
11: // http://www.sun.com/cddl/cddl.html
12: //
13: // From time to time, the license steward (initially Sun Microsystems, Inc.) may
14: // publish revised and/or new versions of the License. You may not use,
15: // distribute, or otherwise make this file available under subsequent versions
16: // of the License.
17: //
18: // Alternatively, the contents of this file may be used under the terms of the
19: // GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which
20: // case the provisions of the LGPL are applicable instead of those above. If you
21: // wish to allow use of your version of this file only under the terms of the
22: // LGPL, and not to allow others to use your version of this file under the
23: // terms of the CDDL, indicate your decision by deleting the provisions above
24: // and replace them with the notice and other provisions required by the LGPL.
25: // If you do not delete the provisions above, a recipient may use your version
26: // of this file under the terms of either the CDDL or the LGPL.
27: //
28: // This library is distributed in the hope that it will be useful,
29: // but WITHOUT ANY WARRANTY; without even the implied warranty of
30: // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
31: // ============================================================================
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 "least"
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: static final long serialVersionUID = -3155796069331714963L;
52:
53: public int compare(T x, T y) {
54: return x.compareTo(y);
55: }
56: }
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