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Java > Open Source Codes > net > sf > jga > fn > UnaryPredicate


1 // ============================================================================
2 // $Id: UnaryPredicate.java,v 1.8 2006/02/10 04:36:08 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;
34
35 /**
36  * A Predicate that takes one argument and returns a boolean result. The
37  * argument is of type <code>T</code>.
38  * <p>
39  * Copyright &copy; 2002-2005 David A. Hall
40  *
41  * @author <a HREF="mailto:davidahall@users.sourceforge.net">David A. Hall</a>
42  * @deprecated not all functors that return boolean are predicates, but all predicates
43  * are functors that return boolean. In most cases where it matters, it is better to
44  * specify a boolean functor rather than a predicate.
45  **/
46
47 abstract public class UnaryPredicate<T> extends UnaryFunctor<T, Boolean JavaDoc>{
48     /**
49      * Evaluates the predicate and returns true or false.
50      */
51     public boolean p(T arg) { return fn(arg); }
52 }
53
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