| /******************************************************************************* |
| * Copyright (c) 2012, 2014 Willink Transformations 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: |
| * E.D.Willink - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ocl.pivot.utilities; |
| |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| import org.eclipse.jdt.annotation.NonNull; |
| |
| /** |
| * A SingletonIterator supports a single iteration over a given value. |
| */ |
| public final class SingletonIterator<T> implements Iterator<T> |
| { |
| private @NonNull T value; |
| private boolean done = false; |
| |
| public SingletonIterator(@NonNull T value) { |
| this.value = value; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return !done; |
| } |
| |
| @Override |
| public @NonNull T next() { |
| if (done) { |
| throw new NoSuchElementException(); |
| } |
| else { |
| done = true; |
| return value; |
| } |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |