Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ArrayIterator |
|
| 2.2;2.2 |
1 | /* | |
2 | * Copyright (C) 1998-2000 Semiotek Inc. All Rights Reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted under the terms of either of the following | |
6 | * Open Source licenses: | |
7 | * | |
8 | * The GNU General Public License, version 2, or any later version, as | |
9 | * published by the Free Software Foundation | |
10 | * (http://www.fsf.org/copyleft/gpl.html); | |
11 | * | |
12 | * or | |
13 | * | |
14 | * The Semiotek Public License (http://webmacro.org/LICENSE.) | |
15 | * | |
16 | * This software is provided "as is", with NO WARRANTY, not even the | |
17 | * implied warranties of fitness to purpose, or merchantability. You | |
18 | * assume all risks and liabilities associated with its use. | |
19 | * | |
20 | * See www.webmacro.org for more information on the WebMacro project. | |
21 | */ | |
22 | ||
23 | package org.webmacro.util; | |
24 | ||
25 | import java.util.Iterator; | |
26 | import java.util.NoSuchElementException; | |
27 | ||
28 | /** | |
29 | * An Iterator interface to an array. | |
30 | */ | |
31 | final public class ArrayIterator implements Iterator | |
32 | { | |
33 | ||
34 | final Object[] a; | |
35 | int pos; | |
36 | ||
37 | /** | |
38 | * Construct an iterator given an enumeration. | |
39 | */ | |
40 | public ArrayIterator (Object[] array) | |
41 | 479 | { |
42 | 479 | this.a = array; |
43 | 479 | pos = 0; |
44 | 479 | } |
45 | ||
46 | /** | |
47 | * @return true if we have not yet reached the end of the enumeration. | |
48 | */ | |
49 | final public boolean hasNext () | |
50 | { | |
51 | 2333 | return (pos < a.length); |
52 | } | |
53 | ||
54 | /** | |
55 | * Advance the iterator and return the next value. Return null if we | |
56 | * reach the end of the enumeration. | |
57 | */ | |
58 | final public Object next () | |
59 | { | |
60 | 1959 | if (pos < a.length) |
61 | { | |
62 | 1959 | return a[pos++]; |
63 | } | |
64 | else | |
65 | { | |
66 | 0 | throw new NoSuchElementException("Advanced beyond end of array"); |
67 | } | |
68 | } | |
69 | ||
70 | /** | |
71 | * Unsupported. | |
72 | */ | |
73 | final public void remove () | |
74 | { | |
75 | 0 | throw new UnsupportedOperationException(); |
76 | } | |
77 | ||
78 | /** | |
79 | * Test harness. | |
80 | */ | |
81 | static public void main (String arg[]) | |
82 | { | |
83 | ||
84 | try | |
85 | { | |
86 | 0 | Iterator i = new ArrayIterator(arg); |
87 | 0 | while (i.hasNext()) |
88 | { | |
89 | 0 | System.out.println("item: " + i.next()); |
90 | } | |
91 | } | |
92 | 0 | catch (Exception e) |
93 | { | |
94 | 0 | e.printStackTrace(); |
95 | 0 | } |
96 | 0 | } |
97 | } | |
98 |