| /* |
| * Copyright (c) 2012, 2013 Eike Stepper (Berlin, Germany) and others. |
| * 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: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.emf.cdo.common.security; |
| |
| /** |
| * Describes the possible protection levels a protectable object may have. |
| * |
| * @author Eike Stepper |
| * @since 4.1 |
| */ |
| public enum CDOPermission |
| { |
| NONE(0x00), READ(0x01), WRITE(0x03); |
| |
| private byte bits; |
| |
| private CDOPermission(int bits) |
| { |
| this.bits = (byte)bits; |
| } |
| |
| public byte getBits() |
| { |
| return bits; |
| } |
| |
| /** |
| * @since 4.1 |
| */ |
| public boolean isReadable() |
| { |
| return this != CDOPermission.NONE; |
| } |
| |
| /** |
| * @since 4.1 |
| */ |
| public boolean isWritable() |
| { |
| return this == CDOPermission.WRITE; |
| } |
| |
| public static CDOPermission get(int bits) |
| { |
| bits &= WRITE.getBits(); |
| |
| switch (bits) |
| { |
| case 0x00: |
| return NONE; |
| case 0x01: |
| return READ; |
| case 0x03: |
| return WRITE; |
| default: |
| throw new IllegalArgumentException("Invalid bits: " + bits); |
| } |
| } |
| } |