Showing the changes to java/pkg/sun/management/FileSystem.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.management; | |
| 27 | + | |
| 28 | +import java.io.File; | |
| 29 | +import java.io.IOException; | |
| 30 | + | |
| 31 | +/* | |
| 32 | + * Utility class to support file system operations | |
| 33 | + * | |
| 34 | + * @since 1.5 | |
| 35 | + */ | |
| 36 | +public abstract class FileSystem { | |
| 37 | + | |
| 38 | + private static final Object lock = new Object(); | |
| 39 | + private static FileSystem fs; | |
| 40 | + | |
| 41 | + protected FileSystem() { } | |
| 42 | + | |
| 43 | + /** | |
| 44 | + * Opens the file system | |
| 45 | + */ | |
| 46 | + public static FileSystem open() { | |
| 47 | + synchronized (lock) { | |
| 48 | + if (fs == null) { | |
| 49 | + fs = new FileSystemImpl(); | |
| 50 | + } | |
| 51 | + return fs; | |
| 52 | + } | |
| 53 | + } | |
| 54 | + | |
| 55 | + /** | |
| 56 | + * Tells whether or not the specified file is located on a | |
| 57 | + * file system that supports file security or not. | |
| 58 | + * | |
| 59 | + * @throws IOException if an I/O error occurs. | |
| 60 | + */ | |
| 61 | + public abstract boolean supportsFileSecurity(File f) throws IOException; | |
| 62 | + | |
| 63 | + /** | |
| 64 | + * Tell whether or not the specified file is accessible | |
| 65 | + * by anything other than the file owner. | |
| 66 | + * | |
| 67 | + * @throws IOException if an I/O error occurs. | |
| 68 | + * | |
| 69 | + * @throws UnsupportedOperationException | |
| 70 | + * If file is located on a file system that doesn't support | |
| 71 | + * file security. | |
| 72 | + */ | |
| 73 | + public abstract boolean isAccessUserOnly(File f) throws IOException; | |
| 74 | +} | |