diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/java.base/share/classes/sun/nio/ch/SelChImpl.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/nio/ch/SelChImpl.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2000, 2012, 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.nio.channels.Channel;
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+
+/**
+ * An interface that allows translation (and more!).
+ *
+ * @since 1.4
+ */
+
+public interface SelChImpl extends Channel {
+
+    FileDescriptor getFD();
+
+    int getFDVal();
+
+    /**
+     * Adds the specified ops if present in interestOps. The specified
+     * ops are turned on without affecting the other ops.
+     *
+     * @return  true iff the new value of sk.readyOps() set by this method
+     *          contains at least one bit that the previous value did not
+     *          contain
+     */
+    public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl sk);
+
+    /**
+     * Sets the specified ops if present in interestOps. The specified
+     * ops are turned on, and all other ops are turned off.
+     *
+     * @return  true iff the new value of sk.readyOps() set by this method
+     *          contains at least one bit that the previous value did not
+     *          contain
+     */
+    public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl sk);
+
+    void translateAndSetInterestOps(int ops, SelectionKeyImpl sk);
+
+    int validOps();
+
+    void kill() throws IOException;
+
+}