1 /*

     2  * Copyright 2008-2009 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.nio.fs;

    27 

    28 /**

    29  * Container for device/inode to uniquely identify file.

    30  */

    31 

    32 class UnixFileKey {

    33     private final long st_dev;

    34     private final long st_ino;

    35 

    36     UnixFileKey(long st_dev, long st_ino) {

    37         this.st_dev = st_dev;

    38         this.st_ino = st_ino;

    39     }

    40 

    41     @Override

    42     public int hashCode() {

    43         return (int)(st_dev ^ (st_dev >>> 32)) +

    44                (int)(st_ino ^ (st_ino >>> 32));

    45     }

    46 

    47     @Override

    48     public boolean equals(Object obj) {

    49         if (obj == this)

    50             return true;

    51         if (!(obj instanceof UnixFileKey))

    52             return false;

    53         UnixFileKey other = (UnixFileKey)obj;

    54         return (this.st_dev == other.st_dev) && (this.st_ino == other.st_ino);

    55     }

    56 }