如何使用method.inserAt（）; 正确地

Question

I try some Bytecode manipulation in my WebApplication and so far, so good. Now I need to inject some byte code on some specific places in my code. I tried this with a switch statement and method.inserAt(); , but it won't show the results I want.

Here's my code for the manipulation

private void changeMethod(CtMethod method) throws NotFoundException, CannotCompileException {

    if (method.hasAnnotation(Loggable.class)) {
        int linenumber = 0;
        int i = 0;
        switch(i) {
            case 0:  linenumber = 50;
                break;
            case 1: linenumber = 71;
                break;
            case 2: linenumber =  91;
                break;
        }

        method.insertAt(linenumber, "\n" +
                "        Thread thread1 = new Thread(new Runnable() {\n" +
                "            @Override\n" +
                "            public void run() {\n" +
                "\n" +
                "\n" +
                "                threadLogger.info(\"Testlog\");\n" +
                "\n" +
                "                try {\n" +
                "                    threadLogger.logCall(Webservice.this.getClass().getMethod(\"startThread1\"), \"Thread1\");\n" +
                "                } catch (Exception e) {\n" +
                "                    e.printStackTrace();\n" +
                "                }\n" +
                "\n" +
                "\n" +
                "            }\n" +
                "        });\n" +
                "        thread1.start();");
        i++;

    }
}

Answer 1

Realise that here:

int i = 0;
switch(i) { ...

i is always going to be zero. Maybe you want to do something with that value?