程序包 cn.taketoday.instrument

类 WeavingTransformer

java.lang.Object

cn.taketoday.instrument.WeavingTransformer

public class WeavingTransformer
extends Object

ClassFileTransformer-based weaver, allowing for a list of transformers to be applied on a class byte array. Normally used inside class loaders.

Note: This class is deliberately implemented for minimal external dependencies, since it is included in weaver jars (to be deployed into application servers).

从以下版本开始:

4.0

作者:

Rod Johnson, Costin Leau, Juergen Hoeller

构造器概要

构造器

构造器	说明
WeavingTransformer(ClassLoader classLoader)	Create a new WeavingTransformer for the given class loader.

方法概要

修饰符和类型	方法	说明
void	addTransformer(ClassFileTransformer transformer)	Add a class file transformer to be applied by this weaver.
byte[]	transformIfNecessary(String className, byte[] bytes)	Apply transformation on a given class byte definition.
byte[]	transformIfNecessary(String className, String internalName, byte[] bytes, ProtectionDomain pd)	Apply transformation on a given class byte definition.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

WeavingTransformer

public WeavingTransformer(@Nullable
 ClassLoader classLoader)

Create a new WeavingTransformer for the given class loader.

参数:

classLoader - the ClassLoader to build a transformer for

方法详细资料

addTransformer

public void addTransformer(ClassFileTransformer transformer)

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

参数:

transformer - the class file transformer to register

transformIfNecessary

public byte[] transformIfNecessary(String className,
 byte[] bytes)

Apply transformation on a given class byte definition. The method will always return a non-null byte array (if no transformation has taken place the array content will be identical to the original one).

参数:

className - the full qualified name of the class in dot format (i.e. some.package.SomeClass)

bytes - class byte definition

返回:

(possibly transformed) class byte definition

transformIfNecessary

public byte[] transformIfNecessary(String className,
 String internalName,
 byte[] bytes,
 @Nullable
 ProtectionDomain pd)

Apply transformation on a given class byte definition. The method will always return a non-null byte array (if no transformation has taken place the array content will be identical to the original one).

参数:

className - the full qualified name of the class in dot format (i.e. some.package.SomeClass)

internalName - class name internal name in / format (i.e. some/package/SomeClass)

bytes - class byte definition

pd - protection domain to be used (can be null)

返回:

(possibly transformed) class byte definition