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diff --git a/src/main/javassist/convert/TransformFieldAccess.java b/src/main/javassist/convert/TransformFieldAccess.java
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+++ b/src/main/javassist/convert/TransformFieldAccess.java
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+/*
+ * This file is part of the Javassist toolkit.
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * either http://www.mozilla.org/MPL/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Javassist.
+ *
+ * The Initial Developer of the Original Code is Shigeru Chiba.  Portions
+ * created by Shigeru Chiba are Copyright (C) 1999-2003 Shigeru Chiba.
+ * All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * The development of this software is supported in part by the PRESTO
+ * program (Sakigake Kenkyu 21) of Japan Science and Technology Corporation.
+ */
+
+package javassist.convert;
+
+import javassist.bytecode.*;
+import javassist.CtClass;
+import javassist.CtField;
+import javassist.Modifier;
+import javassist.CannotCompileException;
+
+final public class TransformFieldAccess extends Transformer {
+    private String newClassname, newFieldname;
+    private String fieldname;
+    private CtClass fieldClass;
+    private boolean isPrivate;
+
+    /* cache */
+    private int newIndex;
+    private ConstPool constPool;
+
+    public TransformFieldAccess(Transformer next, CtField field,
+				String newClassname, String newFieldname)
+    {
+	super(next);
+	this.fieldClass = field.getDeclaringClass();
+	this.fieldname = field.getName();
+	this.isPrivate = Modifier.isPrivate(field.getModifiers());
+	this.newClassname = newClassname;
+	this.newFieldname = newFieldname;
+	this.constPool = null;
+    }
+
+    public void initialize(ConstPool cp, CodeAttribute attr) {
+	if (constPool != cp)
+	    newIndex = 0;
+    }
+
+    /**
+     * Modify GETFIELD, GETSTATIC, PUTFIELD, and PUTSTATIC so that
+     * a different field is accessed.  The new field must be declared
+     * in a superclass of the class in which the original field is
+     * declared.
+     */
+    public int transform(CtClass clazz, int pos,
+			 CodeIterator iterator, ConstPool cp)
+    {
+	int c = iterator.byteAt(pos);
+	if (c == GETFIELD || c == GETSTATIC
+				|| c == PUTFIELD || c == PUTSTATIC) {
+	    int index = iterator.u16bitAt(pos + 1);
+	    String typedesc
+		= TransformReadField.isField(clazz.getClassPool(), cp,
+				fieldClass, fieldname, isPrivate, index);
+	    if (typedesc != null) {
+		if (newIndex == 0) {
+		    int nt = cp.addNameAndTypeInfo(newFieldname,
+						   typedesc);
+		    newIndex = cp.addFieldrefInfo(
+					cp.addClassInfo(newClassname), nt);
+		    constPool = cp;
+		}
+
+		iterator.write16bit(newIndex, pos + 1);
+	    }
+	}
+
+	return pos;
+    }
+}