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Java > Open Source Codes > net > sf > jga > fn > adaptor > ApplyUnary


1 // ============================================================================
2 // $Id: ApplyUnary.java,v 1.9 2006/08/16 03:02:21 davidahall Exp $
3 // Copyright (c) 2004-2005 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.adaptor;
34
35 import net.sf.jga.fn.UnaryFunctor;
36 import net.sf.jga.util.ArrayUtils;
37
38 /**
39  * Produces an array containing the results of passing an input argument to a given set of unary
40  * functors.
41  * <p>
42  * Copyright &copy; 2004-2005 David A. Hall
43  * @author <a HREF="mailto:davidahall@users.sf.net">David A. Hall</a>
44  */
45
46 public class ApplyUnary<T> extends UnaryFunctor<T,Object JavaDoc[]> {
47
48     static final long serialVersionUID = -7934367561074978884L;
49
50     private UnaryFunctor<T,?>[] _functors;
51     
52     public ApplyUnary (UnaryFunctor<T,?>... functors){
53         _functors = functors;
54     }
55
56     public UnaryFunctor<T,?>[] getFunctors() {
57         return _functors;
58     }
59
60     public Object JavaDoc[] fn(T arg) {
61         Object JavaDoc[] result = new Object JavaDoc[_functors.length];
62         for (int i = 0; i < _functors.length; ++i) {
63             result[i] = _functors[i].fn(arg);
64         }
65
66         return result;
67     }
68
69     /**
70      * Calls the Visitor's <code>visit(ApplyUnary)</code> method, if it
71      * implements the nested Visitor interface.
72      */
73     public void accept(net.sf.jga.fn.Visitor v) {
74         if (v instanceof ApplyUnary.Visitor)
75             ((ApplyUnary.Visitor)v).visit(this);
76         else
77             v.visit(this);
78     }
79
80     // Object overrides
81
82     public String JavaDoc toString() {
83         return ArrayUtils.toString(_functors);
84     }
85     
86     // AcyclicVisitor
87
88     /**
89      * Interface for classes that may interpret an <b>ApplyUnary</b> predicate.
90      */
91     public interface Visitor extends net.sf.jga.fn.Visitor {
92         public void visit(ApplyUnary host);
93     }
94 }
95
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