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


1 // ============================================================================
2 // $Id: ApplyBinary.java,v 1.8 2006/08/16 03:02:41 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.BinaryFunctor;
36 import net.sf.jga.util.ArrayUtils;
37
38 /**
39  * Produces an array containing the results of passing a pair of input arguments to
40  * a given set of binary 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 ApplyBinary<T1,T2> extends BinaryFunctor<T1,T2,Object JavaDoc[]> {
47
48     static final long serialVersionUID = 626713969730810589L;
49     
50     //
51 private BinaryFunctor<T1,T2,?>[] _functors;
52     
53     public ApplyBinary (BinaryFunctor<T1,T2,?>[] functors){
54         _functors = functors;
55     }
56
57     public BinaryFunctor<T1,T2,?>[] getFunctors() {
58         return _functors;
59     }
60
61     public Object JavaDoc[] fn(T1 arg1, T2 arg2) {
62         Object JavaDoc[] result = new Object JavaDoc[_functors.length];
63         for (int i = 0; i < _functors.length; ++i) {
64             result[i] = _functors[i].fn(arg1,arg2);
65         }
66
67         return result;
68     }
69
70     /**
71      * Calls the Visitor's <code>visit(ApplyBinary)</code> method, if it
72      * implements the nested Visitor interface.
73      */
74     public void accept(net.sf.jga.fn.Visitor v) {
75         if (v instanceof ApplyBinary.Visitor)
76             ((ApplyBinary.Visitor)v).visit(this);
77         else
78             v.visit(this);
79     }
80
81     // Object overrides
82
83     public String JavaDoc toString() {
84         return ArrayUtils.toString(_functors);
85     }
86     
87     // AcyclicVisitor
88
89     /**
90      * Interface for classes that may interpret an <b>ApplyBinary</b> predicate.
91      */
92     public interface Visitor extends net.sf.jga.fn.Visitor {
93         public void visit(ApplyBinary host);
94     }
95 }
96
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