com.objectwave.classFile
Class ChangeClass

java.lang.Object
  |
  +--com.objectwave.classFile.ChangeClass

public class ChangeClass

extends java.lang.Object

A class that allows the manipulation of byte codes.

Author:

Dave Hoag

Constructor Summary

ChangeClass()

Method Summary

void	addSimpleAttribute(ClassFile one)
void	copyConstantPoolFromOneToOther(ClassFile one, ClassFile other)
ConstantPoolInfo	createConstantPoolToCallMethod(java.lang.Class c, java.lang.String methodName, java.lang.Class[] args) Use this to create all the ConstantPoolInfo object necessary for a call to the specified method.
void	genericCopy(ClassFile one, ClassFile other) Copy all of the constants from on class to another.
protected java.lang.String	getArgsClassName(java.lang.Class c)
void	injectMethodInto(ClassFile one, ClassFile other, int idxOfMethod)
void	injectTrace(ClassFile one)
void	injectTrace(ClassFile one, java.lang.Class receiver, java.lang.String methodName, java.lang.Class[] args) Force a call to 'Tracker.trace'.
protected boolean	isPrimitiveConstant(ConstantPoolInfo item) case FIELDREF: case METHODREF: case INTERFACE: case NAMEANDTYPE: dos.writeShort(indexOf(arg1, pool)); dos.writeShort(indexOf(arg2, pool));
static void	main(java.lang.String[] args)
protected ConstantPoolInfo	recursiveAdd(ClassFile one, ConstantPoolInfo cpi) Use recursion to ensure that ConstantPoolInfo dependecies are met.
void	updateGotos(byte[] data, int len, int adjust)

Methods inherited from class java.lang.Object

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

Constructor Detail

ChangeClass

public ChangeClass()

Method Detail

main

public static void main(java.lang.String[] args)

injectTrace

public void injectTrace(ClassFile one)
                 throws java.lang.Exception

java.lang.Exception

injectTrace

public void injectTrace(ClassFile one,
                        java.lang.Class receiver,
                        java.lang.String methodName,
                        java.lang.Class[] args)
                 throws java.lang.Exception

Force a call to 'Tracker.trace'.

java.lang.Exception

updateGotos

public void updateGotos(byte[] data,
                        int len,
                        int adjust)

addSimpleAttribute

public void addSimpleAttribute(ClassFile one)
                        throws java.lang.Exception

java.lang.Exception

injectMethodInto

public void injectMethodInto(ClassFile one,
                             ClassFile other,
                             int idxOfMethod)
                      throws java.lang.Exception

java.lang.Exception

genericCopy

public void genericCopy(ClassFile one,
                        ClassFile other)
                 throws java.lang.Exception

Copy all of the constants from on class to another.

java.lang.Exception

recursiveAdd

protected ConstantPoolInfo recursiveAdd(ClassFile one,
                                        ConstantPoolInfo cpi)
                                 throws java.lang.Exception

Use recursion to ensure that ConstantPoolInfo dependecies are met.

java.lang.Exception

copyConstantPoolFromOneToOther

public void copyConstantPoolFromOneToOther(ClassFile one,
                                           ClassFile other)
                                    throws java.lang.Exception

java.lang.Exception

isPrimitiveConstant

protected boolean isPrimitiveConstant(ConstantPoolInfo item)

case FIELDREF: case METHODREF: case INTERFACE: case NAMEANDTYPE: dos.writeShort(indexOf(arg1, pool)); dos.writeShort(indexOf(arg2, pool));

createConstantPoolToCallMethod

public ConstantPoolInfo createConstantPoolToCallMethod(java.lang.Class c,
                                                       java.lang.String methodName,
                                                       java.lang.Class[] args)
                                                throws java.lang.NoSuchMethodException

Use this to create all the ConstantPoolInfo object necessary for a call to the specified method.

Returns:

ConstantPoolInfo of type METHODREF

java.lang.NoSuchMethodException

getArgsClassName

protected java.lang.String getArgsClassName(java.lang.Class c)