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ByteBuddy agent to replace one method param with another

April 11, 2020 by

Questions › ByteBuddy agent to replace one method param with another
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Garmaine asked 3 years ago

I have a large 3rd party code base I can't modify, but I need to make a small but important change in many different places. I was hoping to use a ByteBuddy based agent, but I can't figure out how. The call I need to replace is of the form:

SomeSystemClass.someMethod("foo")

and I need to replace it with

SomeSystemClass.someMethod("bar")

while leaving all other calls to the same method untouched

SomeSystemClass.someMethod("ignore me")

Since SomeSystemClass is a JDK class, I do not want to advise it, but only the classes that contain calls to it. How can this be done?

Note that:

  1. someMethod is static and
  2. the calls (at least some of them) are inside a static initializer block
Are you looking for the answer?
Original Question and Possible Answers can be found on `http://stackoverflow.com`

Question Tags: byte-buddy, java, javaagents

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