01: // ============================================================================
02: // $Id: UnaryPredicate.java,v 1.8 2006/02/10 04:36:08 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
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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
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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,
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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 © 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
48: UnaryFunctor<T, Boolean> {
49: /**
50: * Evaluates the predicate and returns true or false.
51: */
52: public boolean p(T arg) {
53: return fn(arg);
54: }
55: }
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