org.jrd.agent

Class Transformer

java.lang.Object

org.jrd.agent.Transformer

All Implemented Interfaces:

java.lang.instrument.ClassFileTransformer

public class Transformer
extends java.lang.Object
implements java.lang.instrument.ClassFileTransformer

This class represent our transformer for retrieving bytecode.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	allowToSaveBytecode
private java.util.HashMap<java.lang.String,byte[]>	overrides
private java.util.HashMap<java.lang.String,byte[]>	results

Constructor Summary

Constructors

Constructor and Description
Transformer()

Method Summary

Modifier and Type	Method and Description
void	allowToSaveBytecode() This method allows saving of bytecode
void	denyToSaveBytecode() This method denies the bytecode to be saved during transformation.
byte[]	getResult(java.lang.String name) Returns bytecode of transformed class.
void	resetLastValidResult() Resets the map with results to empty map
void	resetOverrides()
void	setOverride(java.lang.String name, byte[] body)
byte[]	transform(java.lang.ClassLoader loader, java.lang.String className, java.lang.Class<?> classBeingRedefined, java.security.ProtectionDomain protectionDomain, byte[] classfileBuffer)

Methods inherited from class java.lang.Object

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

Field Detail

allowToSaveBytecode

private boolean allowToSaveBytecode

results

private java.util.HashMap<java.lang.String,byte[]> results

overrides

private java.util.HashMap<java.lang.String,byte[]> overrides

Constructor Detail

Transformer

public Transformer()

Method Detail

transform

public 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

Specified by:

transform in interface java.lang.instrument.ClassFileTransformer

Throws:

java.lang.instrument.IllegalClassFormatException

getResult

public byte[] getResult(java.lang.String name)

Returns bytecode of transformed class.

Parameters:

name - name of class we want to get

Returns:

bytes of given class

setOverride

public void setOverride(java.lang.String name,
                        byte[] body)

resetLastValidResult

public void resetLastValidResult()

Resets the map with results to empty map

resetOverrides

public void resetOverrides()

allowToSaveBytecode

public void allowToSaveBytecode()

This method allows saving of bytecode

denyToSaveBytecode

public void denyToSaveBytecode()

This method denies the bytecode to be saved during transformation.