Consultation on implementing a similar functionality to javassist's instrument feature.

@raphw firstly thanks to your great job

We were previously using the javassist framework and implemented the functionality to print out which methods were called within the getName method, as well as the ability to add a line of code before internal method calls, such as the length method, using instrument.

However, I've noticed that bytebuddy doesn't seem to have a direct way to achieve this functionality. Could you please guide me on how to implement this in bytebuddy?

`public class MethodTest {

public static String getName() {
    String action = "start";
    int length = action.length();
    int hashCode = action.hashCode();
    return "hello";
}

public static void updateMethod() throws Exception {
    ClassPool pool = ClassPool.getDefault();
    CtClass ctClass = pool.get("com.jd.jr.sgm.client.MethodTest");
    CtMethod getName = ctClass.getDeclaredMethod("getName", new CtClass[]{});
    getName.instrument(
            new ExprEditor() {
                @Override
                public void edit(MethodCall m) throws CannotCompileException {
                    System.out.println(m.getClassName());
                    System.out.println(m.getMethodName());

// if (m.getClassName().equals("java.lang.String") // && m.getMethodName().equals("length")) { // m.replace("$_ = 100;"); // } } } ); ctClass.toBytecode(); MethodTest.getName(); }

public static void main(String[] args) throws Exception {
    updateMethod();
}

raphw / byte-buddy

Consultation on implementing a similar functionality to javassist's instrument feature. #1673