| /******************************************************************************* |
| * Copyright (c) 2007, 2008 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.utility; |
| |
| /** |
| * Yet another level of indirection to allow clients to control |
| * how a command is executed by the server |
| * (e.g. dispatching the command to the UI thread). |
| * |
| * Provisional API: This interface is part of an interim API that is still |
| * under development and expected to change significantly before reaching |
| * stability. It is available at this early stage to solicit feedback from |
| * pioneering adopters on the understanding that any code that uses this API |
| * will almost certainly be broken (repeatedly) as the API evolves. |
| */ |
| public interface CommandExecutorProvider { |
| |
| /** |
| * Return the appropriate command executor. |
| */ |
| CommandExecutor getCommandExecutor(); |
| |
| |
| /** |
| * Straightforward implementation of the command executor provider |
| * interface the returns the default command executor. |
| */ |
| final class Default implements CommandExecutorProvider { |
| public static final CommandExecutorProvider INSTANCE = new Default(); |
| public static CommandExecutorProvider instance() { |
| return INSTANCE; |
| } |
| // ensure single instance |
| private Default() { |
| super(); |
| } |
| public CommandExecutor getCommandExecutor() { |
| return CommandExecutor.Default.instance(); |
| } |
| @Override |
| public String toString() { |
| return "CommandExecutorProvider.Default"; |
| } |
| } |
| |
| } |
