bundles/org.eclipse.osgi/core/adaptor/org/eclipse/osgi/framework/util/PermissionStorage.java

/*******************************************************************************
 * Copyright (c) 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.osgi.framework.util;

import java.io.IOException;
import java.security.*;

/**
 * PermissionStorage privileged action class.
 */

public class PermissionStorage implements org.eclipse.osgi.framework.adaptor.PermissionStorage, PrivilegedExceptionAction {
	private org.eclipse.osgi.framework.adaptor.PermissionStorage storage;
	private String location;
	private String[] data;
	private int action;
	private static final int GET = 1;
	private static final int SET = 2;
	private static final int LOCATION = 3;

	public PermissionStorage(org.eclipse.osgi.framework.adaptor.PermissionStorage storage) {
		this.storage = storage;
	}

	public Object run() throws IOException {
		switch (action) {
			case GET :
				return storage.getPermissionData(location);
			case SET :
				storage.setPermissionData(location, data);
				return null;
			case LOCATION :
				return storage.getLocations();
		}

		throw new UnsupportedOperationException();
	}

	public String[] getPermissionData(String location) throws IOException {
		this.location = location;
		this.action = GET;

		try {
			return (String[]) AccessController.doPrivileged(this);
		} catch (PrivilegedActionException e) {
			throw (IOException) e.getException();
		}
	}

	public String[] getLocations() throws IOException {
		this.action = LOCATION;

		try {
			return (String[]) AccessController.doPrivileged(this);
		} catch (PrivilegedActionException e) {
			throw (IOException) e.getException();
		}
	}

	public void setPermissionData(String location, String[] data) throws IOException {
		this.location = location;
		this.data = data;
		this.action = SET;

		try {
			AccessController.doPrivileged(this);
		} catch (PrivilegedActionException e) {
			throw (IOException) e.getException();
		}
	}
}