| /******************************************************************************* |
| * Copyright (c) 2008, 2013 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License 2.0, which accompanies this distribution |
| * and is available at https://www.eclipse.org/legal/epl-2.0/. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.common.utility.internal.transformer; |
| |
| import org.eclipse.jpt.common.utility.transformer.InterruptibleTransformer; |
| |
| /** |
| * @see ThreadLocalTransformer |
| */ |
| public class ThreadLocalInterruptibleTransformer<I, O> |
| implements InterruptibleTransformer<I, O> |
| { |
| private final ThreadLocal<InterruptibleTransformer<? super I, ? extends O>> threadLocal; |
| private final InterruptibleTransformer<? super I, ? extends O> defaultInterruptibleTransformer; |
| |
| public ThreadLocalInterruptibleTransformer(InterruptibleTransformer<? super I, ? extends O> defaultInterruptibleTransformer) { |
| super(); |
| if (defaultInterruptibleTransformer == null) { |
| throw new NullPointerException(); |
| } |
| this.defaultInterruptibleTransformer = defaultInterruptibleTransformer; |
| this.threadLocal = this.buildThreadLocal(); |
| } |
| |
| private ThreadLocal<InterruptibleTransformer<? super I, ? extends O>> buildThreadLocal() { |
| return new ThreadLocal<InterruptibleTransformer<? super I, ? extends O>>(); |
| } |
| |
| public O transform(I input) throws InterruptedException { |
| return this.get().transform(input); |
| } |
| |
| private InterruptibleTransformer<? super I, ? extends O> get() { |
| InterruptibleTransformer<? super I, ? extends O> transformer = this.threadLocal.get(); |
| if (transformer != null) { |
| return transformer; |
| } |
| return this.defaultInterruptibleTransformer; |
| } |
| |
| /** |
| * Set the current thread's transformer to the specified value. |
| */ |
| public void set(InterruptibleTransformer<? super I, ? extends O> transformer) { |
| this.threadLocal.set(transformer); |
| } |
| |
| /** |
| * Return the string representation of the current thread's transformer. |
| */ |
| @Override |
| public String toString() { |
| return this.get().toString(); |
| } |
| } |