1 /*
2 * Scope: a generic MVC framework.
3 * Copyright (c) 2000-2002, The Scope team
4 * All rights reserved.
5 *
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * Neither the name "Scope" nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 *
36 * $Id: ArraySelectorIterator.java,v 1.6 2002/09/05 15:41:46 ludovicc Exp $
37 */
38 package org.scopemvc.model.util;
39
40
41 import java.util.Iterator;
42 import org.apache.commons.logging.Log;
43 import org.apache.commons.logging.LogFactory;
44 import org.scopemvc.core.Selector;
45 import org.scopemvc.util.Debug;
46
47 /***
48 * <P>
49 *
50 * An Iterator that iterates over an array of Selectors. </P>
51 *
52 * @author <A HREF="mailto:smeyfroi@users.sourceforge.net">Steve Meyfroidt</A>
53 * @created 05 September 2002
54 * @version $Revision: 1.6 $ $Date: 2002/09/05 15:41:46 $
55 */
56 public final class ArraySelectorIterator implements Iterator {
57
58 private final static Log LOG = LogFactory.getLog(ArraySelectorIterator.class);
59
60 private Selector[] selectors;
61
62 private int currentIndex = -1;
63
64
65 /***
66 * Constructor for the ArraySelectorIterator object
67 *
68 * @param inSelectors TODO: Describe the Parameter
69 */
70 public ArraySelectorIterator(Selector[] inSelectors) {
71 if (inSelectors == null) {
72 selectors = new Selector[0];
73 } else {
74 selectors = inSelectors;
75 }
76 currentIndex = 0;
77 }
78
79
80 /***
81 * TODO: document the method
82 *
83 * @return TODO: Describe the Return Value
84 */
85 public boolean hasNext() {
86 if (Debug.ON) {
87 Debug.assertTrue(currentIndex > -1);
88 }
89 return currentIndex < selectors.length;
90 }
91
92
93 /***
94 * TODO: document the method
95 *
96 * @return TODO: Describe the Return Value
97 */
98 public Object next() {
99 if (Debug.ON) {
100 Debug.assertTrue(selectors != null, "null selectors");
101 }
102 if (!(currentIndex > -1 && currentIndex < selectors.length)) {
103 throw new RuntimeException("Iterator past end of Selector list.");
104 }
105
106 Selector result = selectors[currentIndex];
107 ++currentIndex;
108 return result;
109 }
110
111
112 /***
113 * TODO: document the method
114 */
115 public void remove() {
116 throw new UnsupportedOperationException("Can't remove Selectors from a model.");
117 }
118 }
119
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