1 /* 2 * Copyright (c) 2005, 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.nio.ch; 27 28 import java.io.FileDescriptor; 29 import java.io.IOException; 30 31 /* 32 * Represents a key to a specific file on Solaris or Linux 33 */ 34 public class FileKey { 35 36 private long st_dev; // ID of device 37 private long st_ino; // Inode number 38 FileKey()39 private FileKey() { } 40 create(FileDescriptor fd)41 public static FileKey create(FileDescriptor fd) { 42 FileKey fk = new FileKey(); 43 try { 44 fk.init(fd); 45 } catch (IOException ioe) { 46 throw new Error(ioe); 47 } 48 return fk; 49 } 50 hashCode()51 public int hashCode() { 52 return (int)(st_dev ^ (st_dev >>> 32)) + 53 (int)(st_ino ^ (st_ino >>> 32)); 54 } 55 equals(Object obj)56 public boolean equals(Object obj) { 57 if (obj == this) 58 return true; 59 if (!(obj instanceof FileKey)) 60 return false; 61 FileKey other = (FileKey)obj; 62 if ((this.st_dev != other.st_dev) || 63 (this.st_ino != other.st_ino)) { 64 return false; 65 } 66 return true; 67 } 68 init(FileDescriptor fd)69 private native void init(FileDescriptor fd) throws IOException; 70 // Android-removed: Code to load native libraries, doesn't make sense on Android. 71 /* 72 private static native void initIDs(); 73 74 static { 75 initIDs(); 76 } 77 */ 78 } 79