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/*******************************************************************************
* 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.common.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 java.util.Iterator Iterator} for an
* {@link java.util.ArrayList ArrayList}.
*
* @param <E> the type of elements returned by the iterator
*
* @see org.eclipse.jpt.common.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();
}
}
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