SecureAction.java

/*******************************************************************************
 * Copyright (c) 2003, 2005 IBM Corporation.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.equinox.device;

import java.security.*;

/**
 * Utility class to execute common privileged code.
 */
public class SecureAction {
	// make sure we use the correct controlContext;
	private AccessControlContext controlContext;

	/**
	 * Constructs a new SecureAction object.  The constructed SecureAction object 
	 * uses the caller's AccessControlContext to perform security checks 
	 */
	public SecureAction() {
		// save the control context to be used.
		this.controlContext = AccessController.getContext();
	}

	/**
	 * Creates a new Thread from a Runnable.  Same as calling
	 * new Thread(target,name).
	 * @param target the Runnable to create the Thread from.
	 * @param name The name of the Thread.
	 * @return The new Thread
	 */
	public Thread createThread(final Runnable target, final String name) {
		if (System.getSecurityManager() == null)
			return new Thread(target, name);
		return (Thread) AccessController.doPrivileged(new PrivilegedAction() {
			public Object run() {
				return new Thread(target, name);
			}
		}, controlContext);
	}
	
	
}