ClassTransformer

```
public interface ClassTransformer
```
Version:

$Rev: 467742 $ $Date: 2006-10-25 21:30:38 +0200 (Wed, 25 Oct 2006) $

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`byte[]`	`transform(java.lang.ClassLoader loader, java.lang.String className, java.lang.Class<?> classBeingRedefined, java.security.ProtectionDomain protectionDomain, byte[] classfileBuffer)`	Invoked when a class is being loaded or redefined.

- Method Detail
  - transform
```
byte[] transform(java.lang.ClassLoader loader,
                 java.lang.String className,
                 java.lang.Class<?> classBeingRedefined,
                 java.security.ProtectionDomain protectionDomain,
                 byte[] classfileBuffer)
          throws java.lang.instrument.IllegalClassFormatException
```
    Invoked when a class is being loaded or redefined. The implementation of this method may transform the supplied class file and return a new replacement class file.
    
    Parameters:
    
    loader - The defining loader of the class to be transformed, may be null if the bootstrap loader
    
    className - The name of the class in the internal form of fully qualified class and interface names
    
    classBeingRedefined - If this is a redefine, the class being redefined, otherwise null
    
    protectionDomain - The protection domain of the class being defined or redefined
    
    classfileBuffer - The input byte buffer in class file format - must not be modified
    
    Returns:
    
    A well-formed class file buffer (the result of the transform), or null if no transform is performed
    
    Throws:
    
    java.lang.instrument.IllegalClassFormatException - If the input does not represent a well-formed class file