01: // ============================================================================
02: // $Id: Project2nd.java,v 1.7 2006/01/08 00:52:25 davidahall Exp $
03: // Copyright (c) 2002-2005 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.fn.adaptor;
34:
35: import net.sf.jga.fn.BinaryFunctor;
36:
37: /**
38: * Binary Functor that returns the second of two runtime arguments.
39: *
40: * <p>Copyright © 2002-2005 David A. Hall
41: *
42: * @author <a href="mailto:davidahall@users.sourceforge.net">David A. Hall</a>
43: */
44:
45: public class Project2nd<T1, T2> extends BinaryFunctor<T1, T2, T2> {
46:
47: static final long serialVersionUID = -222194429833096707L;
48:
49: // BinaryFunctor interface
50:
51: /**
52: * Given two arguments, returns the second. The first argument is not
53: * evaluated in any way by this predicate.
54: *
55: * @return x
56: */
57: public T2 fn(T1 unused, T2 y) {
58: return y;
59: }
60:
61: /**
62: * Calls the Visitor's <code>visit(Project2nd)</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 Project2nd.Visitor)
67: ((Project2nd.Visitor) v).visit(this );
68: else
69: v.visit(this );
70: }
71:
72: // Object overrides
73:
74: public String toString() {
75: return "Project2nd";
76: }
77:
78: // AcyclicVisitor
79:
80: /**
81: * Interface for classes that may interpret an <b>Project2nd</b> functor.
82: */
83: public interface Visitor extends net.sf.jga.fn.Visitor {
84: public void visit(Project2nd host);
85: }
86: }
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