01: // ============================================================================
02: // $Id: ApplyGenerator.java,v 1.8 2006/05/22 03:28:53 davidahall Exp $
03: // Copyright (c) 2004-2005 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:
33: package net.sf.jga.fn.adaptor;
34:
35: import net.sf.jga.fn.Generator;
36: import net.sf.jga.util.ArrayUtils;
37:
38: /**
39: * Generates an array containing the results produced by zero or more given
40: * generators.
41: * <p>
42: * Copyright © 2004-2005 David A. Hall
43: * @author <a href="mailto:davidahall@users.sf.net">David A. Hall</a>
44: */
45:
46: public class ApplyGenerator extends Generator<Object[]> {
47:
48: static final long serialVersionUID = -2160391060913269243L;
49:
50: //
51: private Generator[] _generators;
52:
53: public ApplyGenerator(Generator... generators) {
54: _generators = generators;
55: }
56:
57: public Generator[] getGenerators() {
58: return _generators;
59: }
60:
61: public Object[] gen() {
62: Object[] result = new Object[_generators.length];
63: for (int i = 0; i < _generators.length; ++i) {
64: result[i] = _generators[i].gen();
65: }
66:
67: return result;
68: }
69:
70: /**
71: * Calls the Visitor's <code>visit(ApplyGenerator)</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 ApplyGenerator.Visitor)
76: ((ApplyGenerator.Visitor) v).visit(this );
77: else
78: v.visit(this );
79: }
80:
81: // Object overrides
82:
83: public String toString() {
84: return ArrayUtils.toString(_generators);
85: }
86:
87: // AcyclicVisitor
88:
89: /**
90: * Interface for classes that may interpret an <b>ApplyGenerator</b> predicate.
91: */
92: public interface Visitor extends net.sf.jga.fn.Visitor {
93: public void visit(ApplyGenerator host);
94: }
95: }
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