Hi Klaus
You'll need to find the INVOKESTATIC instruction first, if you have an
idea which methods and classes the call(s) exist in this will help,
InstructionFinder is about finding a pattern of instructions you could
use it to find INVOKESTATIC instructions but that would probably be
overkill, you could just use an iterator or something similar.
Once you have found the INVOKESTATIC instructions you could then test to
see which one(s) match your function call, you could do this by looking
at the classname and method name and possibly arguments the other way
would be to look up the index for the method in the constant pool (if it
exists in the constant pool, don't put it in if it doesn't) and compare
this index to that of the INVOKESTATIC instruction which you have found.
If the static method doesn't exist in the constant pool then there isn't
a call to that static method in the code your currently looking at so
you could move on to the next method to search.
Once you find an INVOKESTATIC that matches you need to put your new
static method in the constant pool via a ConstantPoolGen, this will
return an index which you can then use with the setIndex method on the
INVOKESTATIC instruction. You can use the setIndex because you are just
changing the target of INVOKESTATIC instructions, otherwise you would
have to replace the instruction itself.
I'm not sure what other finalising things you will need to do, the
ConstantPool, ConstantPoolGen will have changed so will need to
finalise that, and you will have to get a Method from the MethodGen
object you previously had but I think that's about all...
Another way might be to define an InstructionVisitor overriding the
visit method for INVOKESTATIC to find and edit the appropriate instructions.
Hope it helps
Bye Arrin
Klaus Teller wrote:
Hi Folks,
I have a J2ME Library that contains the following instruction:
invokestatic
javax/microedition/io/Connector/open(Ljava/lang/String;IZ)Ljavax/microedition/io/Connection;
I would like to replace it with:
invokestatic
mypackage/AlphaConnector/open(Ljava/lang/String;IZ)Ljavax/microedition/io/Connection;
What do i need to do?
I couldn't find a way to search instruction based on the operand (that is the second part of the instruction). I tried IntructionFinder; but it couldn't help me.
I would very much appreciate any input.
Thanks,
Klaus.
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