1 package org.djutils.immutablecollections;
2
3 import java.util.Iterator;
4
5 /**
6 * An immutable iterator over elements, wrapping a "mutable" iterator. The default remove method from the interface will throw
7 * an exception.
8 * <p>
9 * Copyright (c) 2016-2022 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See
10 * for project information <a href="https://djutils.org" target="_blank"> https://djutils.org</a>. The DJUTILS project is
11 * distributed under a three-clause BSD-style license, which can be found at
12 * <a href="https://djutils.org/docs/license.html" target="_blank"> https://djutils.org/docs/license.html</a>.
13 * </p>
14 * @author <a href="https://www.tudelft.nl/averbraeck">Alexander Verbraeck</a>
15 * @author <a href="https://www.tudelft.nl/staff/p.knoppers/">Peter Knoppers</a>
16 * @param <E> the element type
17 */
18 public class ImmutableIterator<E> implements Iterator<E>
19 {
20 /** the wrapped iterator. */
21 private final Iterator<E> iterator;
22
23 /**
24 * @param iterator Iterator<E>; the iterator to wrap as an immutable iterator.
25 */
26 public ImmutableIterator(final Iterator<E> iterator)
27 {
28 this.iterator = iterator;
29 }
30
31 /** {@inheritDoc} */
32 @Override
33 public final boolean hasNext()
34 {
35 return this.iterator.hasNext();
36 }
37
38 /** {@inheritDoc} */
39 @Override
40 public final E next()
41 {
42 return this.iterator.next();
43 }
44
45 /** {@inheritDoc} */
46 @Override
47 public final String toString()
48 {
49 return "ImmutableIterator [iterator=" + this.iterator + "]";
50 }
51
52 }