| /******************************************************************************* |
| * Copyright (c) 2005, 2009 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.utility.internal.iterators; |
| |
| import java.util.ListIterator; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * An <code>ArrayListIterator</code> provides a {@link ListIterator} |
| * for an array of objects. |
| * <p> |
| * The name might be a bit confusing: |
| * This is a {@link ListIterator} for an <code>Array</code>; |
| * <em>not</em> an {@link Iterator} for a {@link java.util.ArrayList}. |
| * |
| * @param <E> the type of elements returned by the iterator |
| * |
| * @see org.eclipse.jpt.utility.internal.iterables.ArrayListIterable |
| */ |
| public class ArrayListIterator<E> |
| extends ArrayIterator<E> |
| implements ListIterator<E> |
| { |
| private final int min; |
| |
| |
| /** |
| * Construct a list iterator for the specified array. |
| */ |
| public ArrayListIterator(E... array) { |
| this(array, 0, array.length); |
| } |
| |
| /** |
| * Construct a list iterator for the specified array, |
| * starting at the specified start index and continuing for |
| * the rest of the array. |
| */ |
| public ArrayListIterator(E[] array, int start) { |
| this(array, start, array.length - start); |
| } |
| |
| /** |
| * Construct a list iterator for the specified array, |
| * starting at the specified start index and continuing for |
| * the specified length. |
| */ |
| public ArrayListIterator(E[] array, int start, int length) { |
| super(array, start, length); |
| this.min = start; |
| } |
| |
| public int nextIndex() { |
| return this.cursor; |
| } |
| |
| public int previousIndex() { |
| return this.cursor - 1; |
| } |
| |
| public boolean hasPrevious() { |
| return this.cursor != this.min; |
| } |
| |
| public E previous() { |
| if (this.hasPrevious()) { |
| return this.array[--this.cursor]; |
| } |
| throw new NoSuchElementException(); |
| } |
| |
| public void add(E e) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public void set(E e) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString(); |
| } |
| |
| } |