Package org.apache.openjpa.enhance

Class PCClassFileTransformer

java.lang.Object

org.apache.openjpa.enhance.PCClassFileTransformer

All Implemented Interfaces:

java.lang.instrument.ClassFileTransformer

Direct Known Subclasses:

PCClassFileTransformer.Reentrant

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

Transformer that makes persistent classes implement the PersistenceCapable interface at runtime.

Author:

Abe White

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PCClassFileTransformer.Reentrant

Constructor Summary

Constructors

Constructor	Description
PCClassFileTransformer(MetaDataRepository repos, PCEnhancer.Flags flags, java.lang.ClassLoader tmpLoader, boolean devscan)	Constructor.
PCClassFileTransformer(MetaDataRepository repos, Options opts, java.lang.ClassLoader loader)	Constructor.

Method Summary

Modifier and Type	Method	Description
static PCClassFileTransformer	newInstance(MetaDataRepository repos, Options parseProperties, java.lang.ClassLoader tmpLoader)
byte[]	transform(java.lang.ClassLoader loader, java.lang.String className, java.lang.Class redef, java.security.ProtectionDomain domain, byte[] bytes)
protected byte[]	transform0(java.lang.String className, java.lang.Class redef, byte[] bytes)	We have to split the transform method into two methods to avoid ClassCircularityError when executing method using pure-JIT JVMs such as JRockit.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.instrument.ClassFileTransformer

transform

Constructor Detail

PCClassFileTransformer

public PCClassFileTransformer(MetaDataRepository repos,
                              Options opts,
                              java.lang.ClassLoader loader)

Constructor.

Parameters:

repos - metadata repository to use internally

opts - enhancer configuration options

loader - temporary class loader for loading intermediate classes

PCClassFileTransformer

public PCClassFileTransformer(MetaDataRepository repos,
                              PCEnhancer.Flags flags,
                              java.lang.ClassLoader tmpLoader,
                              boolean devscan)

Constructor.

Parameters:

repos - metadata repository to use internally

flags - enhancer configuration

tmpLoader - temporary class loader for loading intermediate classes

devscan - whether to scan the dev classpath for persistent types if none are configured

Method Detail

newInstance

public static PCClassFileTransformer newInstance(MetaDataRepository repos,
                                                 Options parseProperties,
                                                 java.lang.ClassLoader tmpLoader)

transform

public byte[] transform(java.lang.ClassLoader loader,
                        java.lang.String className,
                        java.lang.Class redef,
                        java.security.ProtectionDomain domain,
                        byte[] bytes)
                 throws java.lang.instrument.IllegalClassFormatException

Specified by:

transform in interface java.lang.instrument.ClassFileTransformer

Throws:

java.lang.instrument.IllegalClassFormatException

transform0

protected byte[] transform0(java.lang.String className,
                            java.lang.Class redef,
                            byte[] bytes)
                     throws java.lang.instrument.IllegalClassFormatException

We have to split the transform method into two methods to avoid ClassCircularityError when executing method using pure-JIT JVMs such as JRockit.

Throws:

java.lang.instrument.IllegalClassFormatException