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Java > Open Source Codes > net > sf > jga > fn > property > ArrayUnary


1 // ============================================================================
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// $Id: ArrayUnary.java,v 1.8 2006/08/05 21:30:44 davidahall Exp $
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// Copyright (c) 2004-2005 David A. Hall
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// ============================================================================
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// The contents of this file are subject to the Common Development and
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// Distribution License (CDDL), Version 1.0 (the License); you may not use this
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// file except in compliance with the License. You should have received a copy
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// of the the License along with this file: if not, a copy of the License is
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// available from Sun Microsystems, Inc.
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//
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// http://www.sun.com/cddl/cddl.html
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//
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// From time to time, the license steward (initially Sun Microsystems, Inc.) may
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// publish revised and/or new versions of the License. You may not use,
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// distribute, or otherwise make this file available under subsequent versions
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// of the License.
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//
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// Alternatively, the contents of this file may be used under the terms of the
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// GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which
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// case the provisions of the LGPL are applicable instead of those above. If you
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// wish to allow use of your version of this file only under the terms of the
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// LGPL, and not to allow others to use your version of this file under the
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// terms of the CDDL, indicate your decision by deleting the provisions above
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// and replace them with the notice and other provisions required by the LGPL.
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// If you do not delete the provisions above, a recipient may use your version
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// of this file under the terms of either the CDDL or the LGPL.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// ============================================================================
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 &copy; 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 JavaDoc[]> {
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 JavaDoc[] fn(T arg) {
57         // This line throws an unchecked cast warning, since the compiler
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// can't detect that the cast is safe.
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return (Object JavaDoc[]) new Object JavaDoc[] { 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 JavaDoc 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 }
89
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