| /******************************************************************************* |
| * Copyright (c) 2009 IBM Corporation 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 |
| ******************************************************************************/ |
| package org.eclipse.equinox.log; |
| |
| import java.security.Permission; |
| import java.security.PermissionCollection; |
| import java.util.Enumeration; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * Stores a set of <code>LogPermission</code> permissions. |
| * |
| * @ThreadSafe |
| * @see java.security.Permission |
| * @see java.security.Permissions |
| * @see java.security.PermissionCollection |
| */ |
| public final class LogPermissionCollection extends PermissionCollection { |
| private static final long serialVersionUID = -1955409691185916778L; |
| LogPermission logPermission; |
| |
| public void add(Permission permission) { |
| if (!(permission instanceof LogPermission)) |
| throw new IllegalArgumentException("invalid permission: " + permission); //$NON-NLS-1$ |
| if (isReadOnly()) |
| throw new SecurityException("attempt to add a LogPermission to a readonly LogPermissionCollection"); //$NON-NLS-1$ |
| if (permission != null) |
| logPermission = (LogPermission) permission; |
| } |
| |
| public Enumeration elements() { |
| return new Enumeration() { |
| private boolean hasMore = (logPermission != null); |
| |
| public boolean hasMoreElements() { |
| return hasMore; |
| } |
| |
| public Object nextElement() { |
| if (hasMore) { |
| hasMore = false; |
| return logPermission; |
| } |
| throw new NoSuchElementException(); |
| } |
| }; |
| } |
| |
| public boolean implies(Permission permission) { |
| return logPermission != null && logPermission.implies(permission); |
| } |
| |
| } |