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diff --git a/src/share/classes/com/sun/org/apache/bcel/internal/classfile/Signature.java b/src/share/classes/com/sun/org/apache/bcel/internal/classfile/Signature.java
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+++ b/src/share/classes/com/sun/org/apache/bcel/internal/classfile/Signature.java
@@ -0,0 +1,299 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+package com.sun.org.apache.bcel.internal.classfile;
+
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2001 The Apache Software Foundation.  All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Apache Software Foundation (http://www.apache.org/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Apache" and "Apache Software Foundation" and
+ *    "Apache BCEL" must not be used to endorse or promote products
+ *    derived from this software without prior written permission. For
+ *    written permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ *    "Apache BCEL", nor may "Apache" appear in their name, without
+ *    prior written permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ */
+
+import  com.sun.org.apache.bcel.internal.Constants;
+import  java.io.*;
+
+/**
+ * This class is derived from <em>Attribute</em> and represents a reference
+ * to a <href="http://wwwipd.ira.uka.de/~pizza/gj/">GJ</a> attribute.
+ *
+ * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
+ * @see     Attribute
+ */
+public final class Signature extends Attribute {
+  private int signature_index;
+
+  /**
+   * Initialize from another object. Note that both objects use the same
+   * references (shallow copy). Use clone() for a physical copy.
+   */
+  public Signature(Signature c) {
+    this(c.getNameIndex(), c.getLength(), c.getSignatureIndex(), c.getConstantPool());
+  }
+
+  /**
+   * Construct object from file stream.
+   * @param name_index Index in constant pool to CONSTANT_Utf8
+   * @param length Content length in bytes
+   * @param file Input stream
+   * @param constant_pool Array of constants
+   * @throws IOException
+   */
+  Signature(int name_index, int length, DataInputStream file,
+           ConstantPool constant_pool) throws IOException
+  {
+    this(name_index, length, file.readUnsignedShort(), constant_pool);
+  }
+
+  /**
+   * @param name_index Index in constant pool to CONSTANT_Utf8
+   * @param length Content length in bytes
+   * @param constant_pool Array of constants
+   * @param Signature_index Index in constant pool to CONSTANT_Utf8
+   */
+  public Signature(int name_index, int length, int signature_index,
+                  ConstantPool constant_pool)
+  {
+    super(Constants.ATTR_SIGNATURE, name_index, length, constant_pool);
+    this.signature_index = signature_index;
+  }
+
+  /**
+   * Called by objects that are traversing the nodes of the tree implicitely
+   * defined by the contents of a Java class. I.e., the hierarchy of methods,
+   * fields, attributes, etc. spawns a tree of objects.
+   *
+   * @param v Visitor object
+   */
+   public void accept(Visitor v) {
+     System.err.println("Visiting non-standard Signature object");
+     v.visitSignature(this);
+   }
+
+  /**
+   * Dump source file attribute to file stream in binary format.
+   *
+   * @param file Output file stream
+   * @throws IOException
+   */
+  public final void dump(DataOutputStream file) throws IOException
+  {
+    super.dump(file);
+    file.writeShort(signature_index);
+  }
+
+  /**
+   * @return Index in constant pool of source file name.
+   */
+  public final int getSignatureIndex() { return signature_index; }
+
+  /**
+   * @param Signature_index.
+   */
+  public final void setSignatureIndex(int signature_index) {
+    this.signature_index = signature_index;
+  }
+
+  /**
+   * @return GJ signature.
+   */
+  public final String getSignature() {
+    ConstantUtf8 c = (ConstantUtf8)constant_pool.getConstant(signature_index,
+                                                             Constants.CONSTANT_Utf8);
+    return c.getBytes();
+  }
+
+  /**
+   * Extends ByteArrayInputStream to make 'unreading' chars possible.
+   */
+  private static final class MyByteArrayInputStream extends ByteArrayInputStream {
+    MyByteArrayInputStream(String data) { super(data.getBytes()); }
+    final int  mark()                   { return pos; }
+    final String getData()              { return new String(buf); }
+    final void reset(int p)             { pos = p; }
+    final void unread()                 { if(pos > 0) pos--; }
+  }
+
+  private static boolean identStart(int ch) {
+    return ch == 'T' || ch == 'L';
+  }
+
+  private static boolean identPart(int ch) {
+    return ch == '/' || ch == ';';
+  }
+
+  private static final void matchIdent(MyByteArrayInputStream in, StringBuffer buf) {
+    int ch;
+
+    if((ch = in.read()) == -1)
+      throw new RuntimeException("Illegal signature: " + in.getData() +
+                                 " no ident, reaching EOF");
+
+    //System.out.println("return from ident:" + (char)ch);
+
+    if(!identStart(ch)) {
+      StringBuffer buf2 = new StringBuffer();
+
+      int count = 1;
+      while(Character.isJavaIdentifierPart((char)ch)) {
+        buf2.append((char)ch);
+        count++;
+        ch = in.read();
+      }
+
+      if(ch == ':') { // Ok, formal parameter
+        in.skip("Ljava/lang/Object".length());
+        buf.append(buf2);
+
+        ch = in.read();
+        in.unread();
+        //System.out.println("so far:" + buf2 + ":next:" +(char)ch);
+      } else {
+        for(int i=0; i < count; i++)
+          in.unread();
+      }
+
+      return;
+    }
+
+    StringBuffer buf2 = new StringBuffer();
+    ch = in.read();
+
+    do {
+      buf2.append((char)ch);
+      ch = in.read();
+      //System.out.println("within ident:"+ (char)ch);
+
+    } while((ch != -1) && (Character.isJavaIdentifierPart((char)ch) || (ch == '/')));
+
+    buf.append(buf2.toString().replace('/', '.'));
+
+    //System.out.println("regular return ident:"+ (char)ch + ":" + buf2);
+
+    if(ch != -1)
+      in.unread();
+  }
+
+  private static final void matchGJIdent(MyByteArrayInputStream in,
+                                         StringBuffer buf)
+  {
+    int ch;
+
+    matchIdent(in, buf);
+
+    ch = in.read();
+    if((ch == '<') || ch == '(') { // Parameterized or method
+      //System.out.println("Enter <");
+      buf.append((char)ch);
+      matchGJIdent(in, buf);
+
+      while(((ch = in.read()) != '>') && (ch != ')')) { // List of parameters
+        if(ch == -1)
+          throw new RuntimeException("Illegal signature: " + in.getData() +
+                                     " reaching EOF");
+
+        //System.out.println("Still no >");
+        buf.append(", ");
+        in.unread();
+        matchGJIdent(in, buf); // Recursive call
+      }
+
+      //System.out.println("Exit >");
+
+      buf.append((char)ch);
+    } else
+      in.unread();
+
+    ch = in.read();
+    if(identStart(ch)) {
+      in.unread();
+      matchGJIdent(in, buf);
+    } else if(ch == ')') {
+      in.unread();
+      return;
+    } else if(ch != ';')
+      throw new RuntimeException("Illegal signature: " + in.getData() + " read " +
+                                 (char)ch);
+  }
+
+  public static String translate(String s) {
+    //System.out.println("Sig:" + s);
+    StringBuffer buf = new StringBuffer();
+
+    matchGJIdent(new MyByteArrayInputStream(s), buf);
+
+    return buf.toString();
+  }
+
+  public static final boolean isFormalParameterList(String s) {
+    return s.startsWith("<") && (s.indexOf(':') > 0);
+  }
+
+  public static final boolean isActualParameterList(String s) {
+    return s.startsWith("L") && s.endsWith(">;");
+  }
+
+  /**
+   * @return String representation
+   */
+  public final String toString() {
+    String s = getSignature();
+
+    return "Signature(" + s + ")";
+  }
+
+  /**
+   * @return deep copy of this attribute
+   */
+  public Attribute copy(ConstantPool constant_pool) {
+    return (Signature)clone();
+  }
+}