--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/io/OptionalDataException.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 1996, 2005, 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 java.io;
+
+/**
+ * Exception indicating the failure of an object read operation due to
+ * unread primitive data, or the end of data belonging to a serialized
+ * object in the stream.  This exception may be thrown in two cases:
+ *
+ * <ul>
+ *   <li>An attempt was made to read an object when the next element in the
+ *       stream is primitive data.  In this case, the OptionalDataException's
+ *       length field is set to the number of bytes of primitive data
+ *       immediately readable from the stream, and the eof field is set to
+ *       false.
+ *
+ *   <li>An attempt was made to read past the end of data consumable by a
+ *       class-defined readObject or readExternal method.  In this case, the
+ *       OptionalDataException's eof field is set to true, and the length field
+ *       is set to 0.
+ * </ul>
+ *
+ * @author  unascribed
+ * @since   1.1
+ */
+public class OptionalDataException extends ObjectStreamException {
+
+    private static final long serialVersionUID = -8011121865681257820L;
+
+    /*
+     * Create an <code>OptionalDataException</code> with a length.
+     */
+    OptionalDataException(int len) {
+        eof = false;
+        length = len;
+    }
+
+    /*
+     * Create an <code>OptionalDataException</code> signifying no
+     * more primitive data is available.
+     */
+    OptionalDataException(boolean end) {
+        length = 0;
+        eof = end;
+    }
+
+    /**
+     * The number of bytes of primitive data available to be read
+     * in the current buffer.
+     *
+     * @serial
+     */
+    public int length;
+
+    /**
+     * True if there is no more data in the buffered part of the stream.
+     *
+     * @serial
+     */
+    public boolean eof;
+}