com.uwyn.rife.site.instrument
Class MetaDataBytecodeTransformer

java.lang.Object
  com.uwyn.rife.site.instrument.MetaDataBytecodeTransformer

public abstract class MetaDataBytecodeTransformer
extends Object

This utility class provides an entrance method to modify the bytecode of a class so that meta data from a sibling class is merged into the first class.

Basically, this automatically creates an instance of the meta data class and stores it as a field of the modified class. All the interfaces of the meta data class are also automatically implemented by the modified class by delegating all the method calls to the added field instance.

WARNING: this class is not supposed to be used directly, it is made public since the general RIFE EngineClassLoader has to be able to access it.

Since:

1.6

Version:

$Revision: 3678 $

Author:

Geert Bevin (gbevin[remove] at uwyn dot com)

Constructor Summary

MetaDataBytecodeTransformer()

Method Summary

static byte[]

mergeMetaDataIntoBytes(byte[] origBytes, Class metaData) Performs the actual merging of the meta data class' functionalities into the bytes of the class that were provided.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaDataBytecodeTransformer

public MetaDataBytecodeTransformer()

Method Detail

mergeMetaDataIntoBytes

public static byte[] mergeMetaDataIntoBytes(byte[] origBytes,
                                            Class metaData)

Performs the actual merging of the meta data class' functionalities into the bytes of the class that were provided.

Parameters:

origBytes - the bytes that have to be modied

metaData - the meta data classes that will be merged into it

Returns:

the modified bytes

Since:

1.6