Package org.hibernate.bytecode.spi
Interface ClassTransformer
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- All Superinterfaces:
ClassTransformer
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
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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 to add hooks for persistence bytecode manipulation.
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Method Detail
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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 to add hooks for persistence bytecode manipulation.- Specified by:
transform
in interfaceClassTransformer
- Parameters:
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 format- Returns:
- A well-formed class file that can be loaded
- Throws:
java.lang.instrument.IllegalClassFormatException
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