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75 lines
2.5 KiB
Java
75 lines
2.5 KiB
Java
/*
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* Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.nio.ch;
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import java.io.FileDescriptor;
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import java.io.IOException;
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/*
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* Represents a key to a specific file on Windows
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*/
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public class FileKey {
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private long dwVolumeSerialNumber;
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private long nFileIndexHigh;
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private long nFileIndexLow;
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private FileKey() { }
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public static FileKey create(FileDescriptor fd) throws IOException {
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FileKey fk = new FileKey();
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fk.init(fd);
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return fk;
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}
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public int hashCode() {
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return (int)(dwVolumeSerialNumber ^ (dwVolumeSerialNumber >>> 32)) +
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(int)(nFileIndexHigh ^ (nFileIndexHigh >>> 32)) +
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(int)(nFileIndexLow ^ (nFileIndexHigh >>> 32));
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}
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public boolean equals(Object obj) {
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if (obj == this)
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return true;
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if (!(obj instanceof FileKey))
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return false;
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FileKey other = (FileKey)obj;
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if ((this.dwVolumeSerialNumber != other.dwVolumeSerialNumber) ||
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(this.nFileIndexHigh != other.nFileIndexHigh) ||
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(this.nFileIndexLow != other.nFileIndexLow)) {
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return false;
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}
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return true;
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}
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private native void init(FileDescriptor fd) throws IOException;
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private static native void initIDs();
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static {
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IOUtil.load();
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initIDs();
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}
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}
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