| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| EnumIterator |
|
| 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 | ||
| 24 | package org.webmacro.util; | |
| 25 | ||
| 26 | import java.util.Enumeration; | |
| 27 | import java.util.Iterator; | |
| 28 | import java.util.NoSuchElementException; | |
| 29 | ||
| 30 | ||
| 31 | /** | |
| 32 | * Allow a Java 1.1 enumeration to be used as a JDK 1.2 style Iterator. | |
| 33 | */ | |
| 34 | final public class EnumIterator implements Iterator | |
| 35 | { | |
| 36 | ||
| 37 | final Enumeration wrappedEnum; | |
| 38 | private boolean hasNext; | |
| 39 | ||
| 40 | /** | |
| 41 | * Construct an iterator given an enumeration. | |
| 42 | */ | |
| 43 | public EnumIterator (Enumeration e) | |
| 44 | 2070 | { |
| 45 | 2070 | wrappedEnum = e; |
| 46 | 2070 | hasNext = e.hasMoreElements(); |
| 47 | 2070 | } |
| 48 | ||
| 49 | /** | |
| 50 | * @return true if we have not yet reached the end of the enumeration. | |
| 51 | */ | |
| 52 | final public boolean hasNext () | |
| 53 | { | |
| 54 | 19616 | return hasNext; |
| 55 | } | |
| 56 | ||
| 57 | /** | |
| 58 | * Advance the iterator and return the next value. Return null if we | |
| 59 | * reach the end of the enumeration. | |
| 60 | * | |
| 61 | * @throws NoSuchElementException | |
| 62 | */ | |
| 63 | final public Object next () | |
| 64 | { | |
| 65 | 17548 | if (!hasNext) |
| 66 | { | |
| 67 | 0 | throw new NoSuchElementException("advanced past end of list"); |
| 68 | } | |
| 69 | 17548 | Object o = wrappedEnum.nextElement(); |
| 70 | 17546 | hasNext = wrappedEnum.hasMoreElements(); |
| 71 | 17546 | return o; |
| 72 | } | |
| 73 | ||
| 74 | /** | |
| 75 | * Unsupported. | |
| 76 | * @throws UnsupportedOperationException | |
| 77 | */ | |
| 78 | final public void remove () | |
| 79 | { | |
| 80 | 0 | throw new UnsupportedOperationException(); |
| 81 | } | |
| 82 | ||
| 83 | /** | |
| 84 | * Test harness | |
| 85 | */ | |
| 86 | static public void main (String arg[]) | |
| 87 | { | |
| 88 | 0 | java.util.Vector v = new java.util.Vector(arg.length); |
| 89 | 0 | for (int i = 0; i < arg.length; i++) |
| 90 | { | |
| 91 | 0 | v.addElement(arg[i]); |
| 92 | } | |
| 93 | ||
| 94 | try | |
| 95 | { | |
| 96 | 0 | Iterator i = new EnumIterator(v.elements()); |
| 97 | 0 | while (i.hasNext()) |
| 98 | { | |
| 99 | 0 | System.out.println("item: " + i.next()); |
| 100 | } | |
| 101 | } | |
| 102 | 0 | catch (Exception e) |
| 103 | { | |
| 104 | 0 | e.printStackTrace(); |
| 105 | 0 | } |
| 106 | 0 | } |
| 107 | } | |
| 108 |