1 /*
2  * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 import java.lang.instrument.Instrumentation;
25 import java.lang.instrument.ClassFileTransformer;
26 
27 import java.security.*;
28 
29 /*
30  * Copyright 2003 Wily Technology, Inc.
31  */
32 
33 /**
34  * ClassFileTransformer implementation that returns a copy of its input
35  */
36 public class
37 SimpleIdentityTransformer implements ClassFileTransformer {
38 
39     /**
40      * Constructor for SimpleIdentityTransform.
41      */
SimpleIdentityTransformer()42     public SimpleIdentityTransformer() {
43         super();
44     }
45 
46     /**
47      *
48      */
49     public byte[]
transform( ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)50     transform(
51         ClassLoader loader,
52         String className,
53         Class<?> classBeingRedefined,
54         ProtectionDomain    protectionDomain,
55         byte[] classfileBuffer) {
56         byte[] newBuffer = new byte[classfileBuffer.length];
57         System.arraycopy(classfileBuffer, 0, newBuffer, 0, classfileBuffer.length);
58 
59         return newBuffer;
60     }
61 
62     public byte[]
transform( Module module, ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)63     transform(
64         Module module,
65         ClassLoader loader,
66         String className,
67         Class<?> classBeingRedefined,
68         ProtectionDomain    protectionDomain,
69         byte[] classfileBuffer) {
70         byte[] newBuffer = new byte[classfileBuffer.length];
71         System.arraycopy(classfileBuffer, 0, newBuffer, 0, classfileBuffer.length);
72 
73         return newBuffer;
74     }
75 }
76