diff -r 115e09b7a004 -r 3acf8e5e2ca0 jdk/src/share/classes/sun/nio/ch/FileDispatcher.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/nio/ch/FileDispatcher.java	Sun Feb 15 12:25:54 2009 +0000
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2007-2009 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.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;
+}