| /******************************************************************************* |
| * 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.Arrays; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| import org.eclipse.jpt.common.utility.internal.StringTools; |
| |
| /** |
| * An <code>ArrayIterator</code> provides an {@link Iterator} |
| * for an array of objects of type <code>E</code>. |
| * |
| * @param <E> the type of elements returned by the iterator |
| * |
| * @see org.eclipse.jpt.common.utility.internal.iterables.ArrayIterable |
| */ |
| public class ArrayIterator<E> |
| implements Iterator<E> |
| { |
| final E[] array; // private-protected |
| int cursor; // private-protected |
| private final int max; |
| |
| |
| /** |
| * Construct an iterator for the specified array. |
| */ |
| public ArrayIterator(E... array) { |
| this(array, 0, array.length); |
| } |
| |
| /** |
| * Construct an iterator for the specified array, |
| * starting at the specified start index and continuing for |
| * the rest of the array. |
| */ |
| public ArrayIterator(E[] array, int start) { |
| this(array, start, array.length - start); |
| } |
| |
| /** |
| * Construct an iterator for the specified array, |
| * starting at the specified start index and continuing for |
| * the specified length. |
| */ |
| public ArrayIterator(E[] array, int start, int length) { |
| super(); |
| if ((start < 0) || (start > array.length)) { |
| throw new IllegalArgumentException("start: " + start); //$NON-NLS-1$ |
| } |
| if ((length < 0) || (length > array.length - start)) { |
| throw new IllegalArgumentException("length: " + length); //$NON-NLS-1$ |
| } |
| this.array = array; |
| this.cursor = start; |
| this.max = start + length; |
| } |
| |
| public boolean hasNext() { |
| return this.cursor != this.max; |
| } |
| |
| public E next() { |
| if (this.hasNext()) { |
| return this.array[this.cursor++]; |
| } |
| throw new NoSuchElementException(); |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public String toString() { |
| return StringTools.buildToStringFor(this, Arrays.toString(this.array)); |
| } |
| |
| } |