org.sourceforge.jemm.weaver.transformation.bytecode
Class CodeOperations

java.lang.Object
  org.sourceforge.jemm.weaver.transformation.bytecode.CodeOperations

public class CodeOperations
extends java.lang.Object

Additional operations for a CodeIterator that can improve the general capabilities of the CodeIterator without changing its actual structure.

Author:

Paul Keeble

Constructor Summary

CodeOperations(javassist.bytecode.CodeIterator it)
Create a CodeOperations instance.

Method Summary

int	replace(int pos, byte[] newCode) Replaces the code with the passed byte code.
int	replace(int pos, javassist.bytecode.Bytecode code) Extracts the code to use from a Bytecode object and replaces the code at a particular position.

Methods inherited from class java.lang.Object

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

Constructor Detail

CodeOperations

public CodeOperations(javassist.bytecode.CodeIterator it)

Create a CodeOperations instance.

Parameters:

it - The target code iterator.

Method Detail

replace

public int replace(int pos,
                   byte[] newCode)
            throws javassist.bytecode.BadBytecode

Replaces the code with the passed byte code.

Parameters:

pos - The position to start the replacement at

newCode - The new byte code

Returns:

The amount of space actually added which may be larger than newCode.length

Throws:

javassist.bytecode.BadBytecode - if the gap can't be inserted.

replace

public int replace(int pos,
                   javassist.bytecode.Bytecode code)
            throws javassist.bytecode.BadBytecode

Extracts the code to use from a Bytecode object and replaces the code at a particular position.

Parameters:

pos - The position to place the code

code - The byte code to use

Returns:

The size of the bytecode inserted

Throws:

javassist.bytecode.BadBytecode

See Also:

replace(int, byte[])