--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.jdi/share/classes/com/sun/tools/jdi/ValueImpl.java	Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 1998, 1999, 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 com.sun.tools.jdi;
+
+import com.sun.jdi.*;
+
+abstract class ValueImpl extends MirrorImpl implements Value {
+
+    ValueImpl(VirtualMachine aVm) {
+        super(aVm);
+    }
+
+    static ValueImpl prepareForAssignment(Value value,
+                                          ValueContainer destination)
+                  throws InvalidTypeException, ClassNotLoadedException {
+        if (value == null) {
+            /*
+             * TO DO: Centralize JNI signature knowledge
+             */
+            if (destination.signature().length() == 1) {
+                throw new InvalidTypeException("Can't set a primitive type to null");
+            }
+            return null;    // no further checking or conversion necessary
+        } else {
+            return ((ValueImpl)value).prepareForAssignmentTo(destination);
+        }
+    }
+
+    static byte typeValueKey(Value val) {
+        if (val == null) {
+            return JDWP.Tag.OBJECT;
+        } else {
+            return ((ValueImpl)val).typeValueKey();
+        }
+    }
+
+    abstract ValueImpl prepareForAssignmentTo(ValueContainer destination)
+                 throws InvalidTypeException, ClassNotLoadedException;
+
+    abstract byte typeValueKey();
+}