| /******************************************************************************* |
| * Copyright (c) 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.iterables; |
| |
| import java.util.Arrays; |
| import java.util.Iterator; |
| |
| import org.eclipse.jpt.utility.internal.StringTools; |
| import org.eclipse.jpt.utility.internal.iterators.ArrayIterator; |
| |
| /** |
| * An <code>ArrayIterable</code> provides an {@link Iterable} |
| * for an array of objects of type <code>E</code>. |
| * |
| * @param <E> the type of elements returned by the iterable's iterator |
| * |
| * @see ArrayIterator |
| * @see ArrayListIterable |
| */ |
| public class ArrayIterable<E> |
| implements Iterable<E> |
| { |
| final E[] array; |
| final int start; |
| final int length; |
| |
| /** |
| * Construct an iterable for the specified array. |
| */ |
| public ArrayIterable(E... array) { |
| this(array, 0, array.length); |
| } |
| |
| /** |
| * Construct an iterable for the specified array, |
| * starting at the specified start index and continuing for |
| * the rest of the array. |
| */ |
| public ArrayIterable(E[] array, int start) { |
| this(array, start, array.length - start); |
| } |
| |
| /** |
| * Construct an iterable for the specified array, |
| * starting at the specified start index and continuing for |
| * the specified length. |
| */ |
| public ArrayIterable(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.start = start; |
| this.length = length; |
| } |
| |
| public Iterator<E> iterator() { |
| return new ArrayIterator<E>(this.array, this.start, this.length); |
| } |
| |
| @Override |
| public String toString() { |
| return StringTools.buildToStringFor(this, Arrays.toString(this.array)); |
| } |
| |
| } |