public interface ClassTransformer extends ClassTransformer
A persistence provider provides an instance of this interface to the PersistenceUnitInfo.addTransformer method. The supplied transformer instance will get called to transform entity class files when they are loaded and redefined. The transformation occurs before the class is defined by the JVM
Modifier and Type | Method and Description |
---|---|
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.
|
byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException
Invoked when a class is being loaded or redefined to add hooks for persistence bytecode manipulation.
transform
in interface ClassTransformer
loader
- the defining class loaderof the class being transformed. It may be null if using bootstrap loaderclassName
- The name of the class being transformedclassBeingRedefined
- If an already loaded class is being redefined, then pass this as a parameterprotectionDomain
- ProtectionDomain of the class being (re)-definedclassfileBuffer
- The input byte buffer in class file formatIllegalClassFormatException
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