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Java > Open Source Codes > net > sf > jga > fn > comparison > NotEqualEqual


1 // ============================================================================
2 // $Id: NotEqualEqual.java,v 1.11 2006/01/08 00:52:25 davidahall Exp $
3 // Copyright (c) 2002-2005 David A. Hall
4 // ============================================================================
5 // The contents of this file are subject to the Common Development and
6 // Distribution License (CDDL), Version 1.0 (the License); you may not use this
7 // file except in compliance with the License. You should have received a copy
8 // of the the License along with this file: if not, a copy of the License is
9 // 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.fn.comparison;
34
35 import net.sf.jga.fn.BinaryPredicate;
36
37 /**
38  * Binary Predicate that returns TRUE for object arguments <b>x</b> and
39  * <b>y</b> when x != y using the built-in != operator.
40  * <p>
41  * Copyright &copy; 2002-2005 David A. Hall
42  *
43  * @author <a HREF="mailto:davidahall@users.sourceforge.net">David A. Hall</a>
44  **/
45
46 public class NotEqualEqual<T> extends BinaryPredicate<T,T> {
47     
48     static final long serialVersionUID = 20826505152340718L;
49
50     // BinaryPredicate interface
51
52     /**
53      * Given arguments <b>x</b> and <b>y</b>, returns x != y.
54      *
55      * @return x != y
56      */
57     public Boolean JavaDoc fn(T x, T y) {
58         return (x != y);
59     }
60
61     /**
62      * Calls the Visitor's <code>visit(NotEqualEqual)</code> method, if it
63      * implements the nested Visitor interface.
64      */
65     public void accept(net.sf.jga.fn.Visitor v) {
66         if (v instanceof NotEqualEqual.Visitor)
67             ((NotEqualEqual.Visitor)v).visit(this);
68         else
69             v.visit(this);
70     }
71
72     // Object overrides
73
74     public String JavaDoc toString() {
75         return "NotEqualEqual";
76     }
77     
78     // Acyclic Visitor
79
80     /**
81      * Interface for classes that may interpret a <b>NotEqualEqual</b> predicate.
82      */
83     public interface Visitor extends net.sf.jga.fn.Visitor {
84         public void visit(NotEqualEqual host);
85     }
86 }
87
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