/*

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

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

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

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

 * have any questions.

 */

package sun.nio.fs;

/**

 * Container for device/inode to uniquely identify file.

 */

class UnixFileKey {

    private final long st_dev;

    private final long st_ino;

    UnixFileKey(long st_dev, long st_ino) {

        this.st_dev = st_dev;

        this.st_ino = st_ino;

    }

    @Override

    public int hashCode() {

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

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

    }

    @Override

    public boolean equals(Object obj) {

        if (obj == this)

            return true;

        if (!(obj instanceof UnixFileKey))

            return false;

        UnixFileKey other = (UnixFileKey)obj;

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

    }

}