| /******************************************************************************* |
| * Copyright (c) 2012 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; |
| |
| /** |
| * Convenience transformer that returns <code>null</code> if the original |
| * object is <code>null</code>; otherwise it calls {@link #transform_(Object)}, |
| * which is to be implemented by subclasses. |
| */ |
| public abstract class AbstractTransformer<T1, T2> |
| extends TransformerAdapter<T1, T2> |
| { |
| @Override |
| public final T2 transform(T1 o) { |
| return (o == null) ? null : this.transform_(o); |
| } |
| |
| /** |
| * Transform the specified object; its value is guaranteed to be not |
| * <code>null</code>. |
| */ |
| protected abstract T2 transform_(T1 o); |
| } |
