| /******************************************************************************* |
| * Copyright (c) 2008, 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.common.utility.internal.model.value; |
| |
| import java.util.Iterator; |
| import org.eclipse.jpt.common.utility.internal.iterators.ReadOnlyIterator; |
| import org.eclipse.jpt.common.utility.internal.model.AbstractModel; |
| import org.eclipse.jpt.common.utility.model.value.TreeValueModel; |
| |
| /** |
| * Implementation of {@link TreeValueModel} that can be used for |
| * returning an iterator on a static tree, but still allows listeners to be added. |
| * Listeners will <em>never</em> be notified of any changes, because there should be none. |
| */ |
| public class StaticTreeValueModel<E> |
| extends AbstractModel |
| implements TreeValueModel<E> |
| { |
| /** The tree's nodes. */ |
| protected final Iterable<? extends E> nodes; |
| |
| private static final long serialVersionUID = 1L; |
| |
| |
| /** |
| * Construct a read-only tree value model for the specified nodes. |
| */ |
| public StaticTreeValueModel(Iterable<? extends E> nodes) { |
| super(); |
| if (nodes == null) { |
| throw new NullPointerException(); |
| } |
| this.nodes = nodes; |
| } |
| |
| // ********** TreeValueModel implementation ********** |
| |
| public Iterator<E> nodes() { |
| return new ReadOnlyIterator<E>(this.nodes.iterator()); |
| } |
| |
| |
| // ********** Object overrides ********** |
| |
| @Override |
| public void toString(StringBuilder sb) { |
| sb.append(this.nodes); |
| } |
| |
| } |