| /******************************************************************************* |
| * Copyright (c) 2010, 2011 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.List; |
| import java.util.ListIterator; |
| |
| import org.eclipse.jpt.common.utility.internal.StringTools; |
| import org.eclipse.jpt.common.utility.internal.iterables.ListIterable; |
| |
| /** |
| * Wrap a list iterator on elements of any sub-type of <code>E</code>, |
| * converting it into a <em>non-writable</em> list iterator on elements of type |
| * <code>E</code>. This shouldn't be a problem since the |
| * resulting list iterator disables the methods that would put invalid elements |
| * in the iterator's backing list (i.e. {@link #set(Object)} and {@link #add(Object)}). |
| * |
| * @param <E> the type of elements returned by the iterator |
| * |
| * @see org.eclipse.jpt.common.utility.internal.iterables.SuperListIterableWrapper |
| */ |
| public class SuperListIteratorWrapper<E> |
| implements ListIterator<E> |
| { |
| private final ListIterator<? extends E> listIterator; |
| |
| |
| public SuperListIteratorWrapper(List<? extends E> list) { |
| this(list.listIterator()); |
| } |
| |
| public SuperListIteratorWrapper(ListIterable<? extends E> listIterable) { |
| this(listIterable.iterator()); |
| } |
| |
| public SuperListIteratorWrapper(ListIterator<? extends E> listIterator) { |
| super(); |
| this.listIterator = listIterator; |
| } |
| |
| public boolean hasNext() { |
| return this.listIterator.hasNext(); |
| } |
| |
| public E next() { |
| return this.listIterator.next(); |
| } |
| |
| public int nextIndex() { |
| return this.listIterator.nextIndex(); |
| } |
| |
| public boolean hasPrevious() { |
| return this.listIterator.hasPrevious(); |
| } |
| |
| public E previous() { |
| return this.listIterator.previous(); |
| } |
| |
| public int previousIndex() { |
| return this.listIterator.previousIndex(); |
| } |
| |
| public void remove() { |
| this.listIterator.remove(); |
| } |
| |
| public void set(E e) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public void add(E e) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public String toString() { |
| return StringTools.buildToStringFor(this, this.listIterator); |
| } |
| } |