blob: d12773a57c278e5c88dda86ead91dfcef1e60cd4 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*******************************************************************************
* Copyright (c) 2010 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.internal.iterators;
import java.util.List;
import java.util.ListIterator;
import org.eclipse.jpt.common.utility.internal.StringTools;
import org.eclipse.jpt.common.utility.internal.iterables.ListIterable;
/**
* Wrap a list iterator on elements of any sub-type of <code>E</code>, converting it into a
* list iterator on elements of type <code>E</code>. This shouldn't be a problem since the
* resulting list iterator disables the methods that would put invalid elements
* in the iterator's backing list (i.e. {@link #set(Object)} and {@link #add(Object)}).
*
* @param <E> the type of elements returned by the iterator
*
* @see org.eclipse.jpt.common.utility.internal.iterables.SuperListIterableWrapper
*/
public class SuperListIteratorWrapper<E>
implements ListIterator<E>
{
private final ListIterator<? extends E> listIterator;
public SuperListIteratorWrapper(List<? extends E> list) {
this(list.listIterator());
}
public SuperListIteratorWrapper(ListIterable<? extends E> listIterable) {
this(listIterable.iterator());
}
public SuperListIteratorWrapper(ListIterator<? extends E> listIterator) {
super();
this.listIterator = listIterator;
}
public boolean hasNext() {
return this.listIterator.hasNext();
}
public E next() {
return this.listIterator.next();
}
public int nextIndex() {
return this.listIterator.nextIndex();
}
public boolean hasPrevious() {
return this.listIterator.hasPrevious();
}
public E previous() {
return this.listIterator.previous();
}
public int previousIndex() {
return this.listIterator.previousIndex();
}
public void remove() {
this.listIterator.remove();
}
public void set(E e) {
throw new UnsupportedOperationException();
}
public void add(E e) {
throw new UnsupportedOperationException();
}
@Override
public String toString() {
return StringTools.buildToStringFor(this, this.listIterator);
}
}
|
