| /******************************************************************************* |
| * 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.Iterator; |
| |
| import org.eclipse.jpt.common.utility.internal.StringTools; |
| |
| /** |
| * Wrap an iterator on elements of type <code>E1</code>, converting it into an |
| * iterator on elements of type <code>E2</code>. <em>Assume</em> the wrapped |
| * iterator returns only elements of type <code>E2</code>. |
| * |
| * @param <E1> input: the type of elements returned by the wrapped iterator |
| * @param <E2> output: the type of elements returned by the iterator |
| * |
| * @see org.eclipse.jpt.common.utility.internal.iterables.SubIterableWrapper |
| */ |
| public class SubIteratorWrapper<E1, E2 extends E1> |
| implements Iterator<E2> |
| { |
| private final Iterator<E1> iterator; |
| |
| |
| public SubIteratorWrapper(Iterable<E1> iterable) { |
| this(iterable.iterator()); |
| } |
| |
| public SubIteratorWrapper(Iterator<E1> iterator) { |
| super(); |
| this.iterator = iterator; |
| } |
| |
| public boolean hasNext() { |
| return this.iterator.hasNext(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public E2 next() { |
| return (E2) this.iterator.next(); |
| } |
| |
| public void remove() { |
| this.iterator.remove(); |
| } |
| |
| @Override |
| public String toString() { |
| return StringTools.buildToStringFor(this, this.iterator); |
| } |
| } |