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diff --git a/src/Java/sun/repackage/UnsafeFieldAccessorImpl.java b/src/Java/sun/repackage/UnsafeFieldAccessorImpl.java
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+++ b/src/Java/sun/repackage/UnsafeFieldAccessorImpl.java
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+/*
+ * Copyright (c) 2001, 2011, 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.repackage;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+
+/** Base class for sun.misc.Unsafe-based FieldAccessors. The
+    observation is that there are only nine types of fields from the
+    standpoint of reflection code: the eight primitive types and
+    Object. Using class Unsafe instead of generated bytecodes saves
+    memory and loading time for the dynamically-generated
+    FieldAccessors. */
+
+abstract class UnsafeFieldAccessorImpl extends FieldAccessorImpl {
+    static final Unsafe unsafe = Unsafe.getUnsafe();
+
+    protected final Field   field;
+    protected final long    fieldOffset;
+    protected final boolean isFinal;
+
+    UnsafeFieldAccessorImpl(Field field) {
+        this.field = field;
+        if (Modifier.isStatic(field.getModifiers()))
+            fieldOffset = unsafe.staticFieldOffset(field);
+        else
+            fieldOffset = unsafe.objectFieldOffset(field);
+        isFinal = Modifier.isFinal(field.getModifiers());
+    }
+
+    protected void ensureObj(Object o) {
+        // NOTE: will throw NullPointerException, as specified, if o is null
+        if (!field.getDeclaringClass().isAssignableFrom(o.getClass())) {
+            throwSetIllegalArgumentException(o);
+        }
+    }
+
+    private String getQualifiedFieldName() {
+      return field.getDeclaringClass().getName() + "." +field.getName();
+    }
+
+    protected IllegalArgumentException newGetIllegalArgumentException(String type) {
+        return new IllegalArgumentException(
+          "Attempt to get "+field.getType().getName()+" field \"" +
+          getQualifiedFieldName() + "\" with illegal data type conversion to "+type
+        );
+    }
+
+    protected void throwFinalFieldIllegalAccessException(String attemptedType,
+                                                         String attemptedValue)
+                                                         throws IllegalAccessException {
+        throw new IllegalAccessException(getSetMessage(attemptedType, attemptedValue));
+
+    }
+    protected void throwFinalFieldIllegalAccessException(Object o) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException(o != null ? o.getClass().getName() : "", "");
+    }
+
+    protected void throwFinalFieldIllegalAccessException(boolean z) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("boolean", Boolean.toString(z));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(char b) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("char", Character.toString(b));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(byte b) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("byte", Byte.toString(b));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(short b) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("short", Short.toString(b));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(int i) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("int", Integer.toString(i));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(long i) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("long", Long.toString(i));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(float f) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("float", Float.toString(f));
+    }
+
+    protected void throwFinalFieldIllegalAccessException(double f) throws IllegalAccessException {
+        throwFinalFieldIllegalAccessException("double", Double.toString(f));
+    }
+
+    protected IllegalArgumentException newGetBooleanIllegalArgumentException() {
+        return newGetIllegalArgumentException("boolean");
+    }
+
+    protected IllegalArgumentException newGetByteIllegalArgumentException() {
+        return newGetIllegalArgumentException("byte");
+    }
+
+    protected IllegalArgumentException newGetCharIllegalArgumentException() {
+        return newGetIllegalArgumentException("char");
+    }
+
+    protected IllegalArgumentException newGetShortIllegalArgumentException() {
+        return newGetIllegalArgumentException("short");
+    }
+
+    protected IllegalArgumentException newGetIntIllegalArgumentException() {
+        return newGetIllegalArgumentException("int");
+    }
+
+    protected IllegalArgumentException newGetLongIllegalArgumentException() {
+        return newGetIllegalArgumentException("long");
+    }
+
+    protected IllegalArgumentException newGetFloatIllegalArgumentException() {
+        return newGetIllegalArgumentException("float");
+    }
+
+    protected IllegalArgumentException newGetDoubleIllegalArgumentException() {
+        return newGetIllegalArgumentException("double");
+    }
+
+    protected String getSetMessage(String attemptedType, String attemptedValue) {
+        String err = "Can not set";
+        if (Modifier.isStatic(field.getModifiers()))
+            err += " static";
+        if (isFinal)
+            err += " final";
+        err += " " + field.getType().getName() + " field " + getQualifiedFieldName() + " to ";
+        if (attemptedValue.length() > 0) {
+            err += "(" + attemptedType + ")" + attemptedValue;
+        } else {
+            if (attemptedType.length() > 0)
+                err += attemptedType;
+            else
+                err += "null value";
+        }
+        return err;
+    }
+
+    protected void throwSetIllegalArgumentException(String attemptedType,
+                                                    String attemptedValue) {
+        throw new IllegalArgumentException(getSetMessage(attemptedType,attemptedValue));
+    }
+
+    protected void throwSetIllegalArgumentException(Object o) {
+        throwSetIllegalArgumentException(o != null ? o.getClass().getName() : "", "");
+    }
+
+    protected void throwSetIllegalArgumentException(boolean b) {
+        throwSetIllegalArgumentException("boolean", Boolean.toString(b));
+    }
+
+    protected void throwSetIllegalArgumentException(byte b) {
+        throwSetIllegalArgumentException("byte", Byte.toString(b));
+    }
+
+    protected void throwSetIllegalArgumentException(char c) {
+        throwSetIllegalArgumentException("char", Character.toString(c));
+    }
+
+    protected void throwSetIllegalArgumentException(short s) {
+        throwSetIllegalArgumentException("short", Short.toString(s));
+    }
+
+    protected void throwSetIllegalArgumentException(int i) {
+        throwSetIllegalArgumentException("int", Integer.toString(i));
+    }
+
+    protected void throwSetIllegalArgumentException(long l) {
+        throwSetIllegalArgumentException("long", Long.toString(l));
+    }
+
+    protected void throwSetIllegalArgumentException(float f) {
+        throwSetIllegalArgumentException("float", Float.toString(f));
+    }
+
+    protected void throwSetIllegalArgumentException(double d) {
+        throwSetIllegalArgumentException("double", Double.toString(d));
+    }
+
+}