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## org.hibernate.bytecode
Class AbstractClassTransformerImpl

    java.lang.Object
      org.hibernate.bytecode.AbstractClassTransformerImpl

All Implemented Interfaces:
  ClassTransformer

Direct Known Subclasses:
  CglibClassTransformer, JavassistClassTransformer

    public abstract class AbstractClassTransformerImpl

extends Object
implements ClassTransformer

Author:
  Emmanuel Bernard, Steve Ebersole

Field Summary
`protected ClassFilter` | `classFilter`
`protected FieldFilter` | `fieldFilter`

Constructor Summary
`protected` | `AbstractClassTransformerImpl(ClassFilter classFilter, FieldFilter fieldFilter)`

Method Summary
`protected abstract byte[]` | `doTransform(ClassLoader loader, String className, Class classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)`
`byte[]` | `transform(ClassLoader loader, String className, Class classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)` Invoked when a class is being loaded or redefined to add hooks for persistence bytecode manipulation

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### classFilter

    protected final ClassFilter classFilter

### fieldFilter

    protected final FieldFilter fieldFilter

Constructor Detail

### AbstractClassTransformerImpl

    protected AbstractClassTransformerImpl(ClassFilter classFilter,
                                           FieldFilter fieldFilter)

Method Detail

### transform

    public byte[] transform(ClassLoader loader,
                            String className,
                            Class classBeingRedefined,
                            ProtectionDomain protectionDomain,
                            byte[] classfileBuffer)

  Description copied from interface: `ClassTransformer`
  Invoked when a class is being loaded or redefined to add hooks for persistence bytecode manipulation

  Specified by:
    `transform` in interface `ClassTransformer`
  Parameters:
    `loader` - the defining class loaderof the class being transformed. It may be null if using bootstrap loader
    `className` - The name of the class being transformed
    `classBeingRedefined` - If an already loaded class is being redefined, then pass this as a parameter
    `protectionDomain` - ProtectionDomain of the class being (re)-defined
    `classfileBuffer` - The input byte buffer in class file format
  Returns:
    A well-formed class file that can be loaded

### doTransform

    protected abstract byte[] doTransform(ClassLoader loader,
                                          String className,
                                          Class classBeingRedefined,
                                          ProtectionDomain protectionDomain,
                                          byte[] classfileBuffer)

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