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SimpleInstrumentableClassLoader (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

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org.springframework.instrument.classloading
Class SimpleInstrumentableClassLoader

java.lang.Object
  java.lang.ClassLoader
      org.springframework.core.OverridingClassLoader
          org.springframework.instrument.classloading.SimpleInstrumentableClassLoader

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public class SimpleInstrumentableClassLoader
extends OverridingClassLoader

Simplistic implementation of an instrumentable ClassLoader. Usable in tests and standalone environments.

Since:

2.0

Author:

Rod Johnson, Costin Leau

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Constructor Summary
SimpleInstrumentableClassLoader(ClassLoader parent)           Create a new SimpleLoadTimeWeaver for the given class loader.

 

Method Summary
void	addTransformer(ClassFileTransformer transformer)           Add a class file transformer to be applied by this ClassLoader.
protected  byte[]	transformIfNecessary(String name, byte[] bytes)           Transformation hook to be implemented by subclasses.

 

Methods inherited from class org.springframework.core.OverridingClassLoader
excludeClass, excludePackage, isEligibleForOverriding, loadClass

 

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

 

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

 

Constructor Detail

SimpleInstrumentableClassLoader

public SimpleInstrumentableClassLoader(ClassLoader parent)

Create a new SimpleLoadTimeWeaver for the given class loader.

Parameters:

parent - the ClassLoader to build an simple instrumentable ClassLoader for

Method Detail

addTransformer

public void addTransformer(ClassFileTransformer transformer)

Add a class file transformer to be applied by this ClassLoader.

Parameters:

transformer - the class file transformer to register

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transformIfNecessary

protected byte[] transformIfNecessary(String name,
                                      byte[] bytes)

Description copied from class: OverridingClassLoader

Transformation hook to be implemented by subclasses.

The default implementation simply returns the given bytes as-is.

Overrides:

transformIfNecessary in class OverridingClassLoader

Parameters:

name - the fully-qualified name of the class being transformed

bytes - the raw bytes of the class

Returns:

the transformed bytes (never null; same as the input bytes if the transformation produced no changes)

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