01: // ============================================================================
02: // $Id: DefaultFormat.java,v 1.4 2006/01/08 00:52:25 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: package net.sf.jga.fn.string;
33:
34: import net.sf.jga.fn.UnaryFunctor;
35:
36: /**
37: * Unary Functor that converts values to strings using the toString method.
38: * <p>
39: * Copyright © 2003-2005 David A. Hall
40: *
41: * @author <a href="mailto:davidahall@users.sf.net">David A. Hall</a>
42: */
43:
44: public class DefaultFormat<T> extends UnaryFunctor<T, String> {
45:
46: static final long serialVersionUID = -240489737939394386L;
47:
48: // UnaryFunctor interface
49:
50: /**
51: * Invokes toString() on the argument
52: * <p>
53: * @param arg the value to formatted
54: * @return the formatted value
55: */
56:
57: public String fn(T arg) {
58: return arg.toString();
59: }
60:
61: /**
62: * Calls the Visitor's <code>visit(DefaultFormat)</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 DefaultFormat.Visitor)
67: ((DefaultFormat.Visitor) v).visit(this );
68: else
69: v.visit(this );
70: }
71:
72: // Object overrides
73:
74: public String toString() {
75: return "DefaultFormat";
76: }
77:
78: // Acyclic Visitor
79:
80: /**
81: * Interface for classes that may interpret a <b>DefaultFormat</b>
82: * predicate.
83: */
84: public interface Visitor extends net.sf.jga.fn.Visitor {
85: public void visit(DefaultFormat host);
86: }
87: }
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