程序包 org.hibernate.bytecode.spi

接口 ClassTransformer

所有超级接口:

javax.persistence.spi.ClassTransformer

所有已知实现类:

EnhancingClassTransformerImpl

public interface ClassTransformer
extends javax.persistence.spi.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

作者:

Bill Burke, Emmanuel Bernard

方法概要

修饰符和类型	方法	说明
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.

方法详细资料

transform

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.

指定者:

transform 在接口中 javax.persistence.spi.ClassTransformer

参数:

loader - the defining class loader of 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

返回:

A well-formed class file that can be loaded

抛出:

IllegalClassFormatException