/* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. 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.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.nio.ch; import java.io.*; abstract class FileDispatcher extends NativeDispatcher {     public static final int NO_LOCK = -1;       // Failed to lock    public static final int LOCKED = 0;         // Obtained requested lock    public static final int RET_EX_LOCK = 1;    // Obtained exclusive lock    public static final int INTERRUPTED = 2;    // Request interrupted     abstract int force(FileDescriptor fd, boolean metaData) throws IOException;     abstract int truncate(FileDescriptor fd, long size) throws IOException;     abstract long size(FileDescriptor fd) throws IOException;     abstract int lock(FileDescriptor fd, boolean blocking, long pos, long size,                       boolean shared) throws IOException;     abstract void release(FileDescriptor fd, long pos, long size)        throws IOException;     /**     * Returns a dup of fd if a file descriptor is required for     * memory-mapping operations, otherwise returns an invalid     * FileDescriptor (meaning a newly allocated FileDescriptor)     */    abstract FileDescriptor duplicateForMapping(FileDescriptor fd)        throws IOException;}