| /* |
| * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.agent; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| /* |
| * Utility class to support file system operations |
| * |
| * @since 1.5 |
| */ |
| public abstract class FileSystem { |
| |
| private static final Object lock = new Object(); |
| private static FileSystem fs; |
| |
| protected FileSystem() { } |
| |
| /** |
| * Opens the file system |
| */ |
| public static FileSystem open() { |
| synchronized (lock) { |
| if (fs == null) { |
| fs = new FileSystemImpl(); |
| } |
| return fs; |
| } |
| } |
| |
| /** |
| * Tells whether or not the specified file is located on a |
| * file system that supports file security or not. |
| * |
| * @throws IOException if an I/O error occurs. |
| */ |
| public abstract boolean supportsFileSecurity(File f) throws IOException; |
| |
| /** |
| * Tell whether or not the specified file is accessible |
| * by anything other than the file owner. |
| * |
| * @throws IOException if an I/O error occurs. |
| * |
| * @throws UnsupportedOperationException |
| * If file is located on a file system that doesn't support |
| * file security. |
| */ |
| public abstract boolean isAccessUserOnly(File f) throws IOException; |
| } |