01: // ============================================================================
02: // $Id: ArrayUnary.java,v 1.8 2006/08/05 21:30:44 davidahall Exp $
03: // Copyright (c) 2004-2005 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.property;
34:
35: import net.sf.jga.fn.UnaryFunctor;
36:
37: /**
38: * Unary Functor that returns its arguments in a one element array.
39: * <p>
40: * Copyright © 2004-2005 David A. Hall
41: *
42: * @author <a href="mailto:davidahall@users.sourceforge.net">David A. Hall</a>
43: **/
44:
45: public class ArrayUnary<T> extends UnaryFunctor<T, Object[]> {
46:
47: static final long serialVersionUID = -5596834171206366743L;
48:
49: // UnaryFunctor interface
50:
51: /**
52: * Returns its argument in a one element array
53: * <p>
54: * @return the object built by the constructor
55: */
56: public Object[] fn(T arg) {
57: // This line throws an unchecked cast warning, since the compiler
58: // can't detect that the cast is safe.
59: return (Object[]) new Object[] { arg };
60: }
61:
62: /**
63: * Calls the Visitor's <code>visit(ArrayUnary)</code> method, if it
64: * implements the nested Visitor interface.
65: */
66: public void accept(net.sf.jga.fn.Visitor v) {
67: if (v instanceof ArrayUnary.Visitor)
68: ((ArrayUnary.Visitor) v).visit(this );
69: else
70: v.visit(this );
71: }
72:
73: // Object overrides
74:
75: public String toString() {
76: return "ArrayUnary";
77: }
78:
79: // Acyclic Visitor
80:
81: /**
82: * Interface for classes that may interpret a <b>ArrayUnary</b>
83: * predicate.
84: */
85: public interface Visitor extends net.sf.jga.fn.Visitor {
86: public void visit(ArrayUnary host);
87: }
88: }
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