| /* |
| * Copyright (c) 2012 Eike Stepper (Berlin, Germany) and others. |
| * 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: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.util.collection; |
| |
| import java.util.Iterator; |
| import java.util.ListIterator; |
| |
| /** |
| * @author Eike Stepper |
| * @since 3.3 |
| */ |
| public class BidirectionalIterator<T> implements Iterator<T> |
| { |
| private final ListIterator<T> delegate; |
| |
| private boolean backward; |
| |
| public BidirectionalIterator(ListIterator<T> delegate, boolean backward) |
| { |
| this.delegate = delegate; |
| this.backward = backward; |
| } |
| |
| public BidirectionalIterator(ListIterator<T> delegate) |
| { |
| this(delegate, false); |
| } |
| |
| public ListIterator<T> getDelegate() |
| { |
| return delegate; |
| } |
| |
| public boolean isBackward() |
| { |
| return backward; |
| } |
| |
| public void setBackward(boolean backward) |
| { |
| this.backward = backward; |
| } |
| |
| public boolean hasNext() |
| { |
| return backward ? delegate.hasPrevious() : delegate.hasNext(); |
| } |
| |
| public T next() |
| { |
| return backward ? delegate.previous() : delegate.next(); |
| } |
| |
| public void remove() |
| { |
| delegate.remove(); |
| } |
| } |