CODEWITHSUNDEEP
eclipseblackberryjava-me
user2418661
user2418661

Reputation: 53

Java / Eclipse - macro to specify current method name?

I'm using eclipse and want to have a "macro" that the preprocessor will replace with the name of the current method before compiling it.

I have an error reporting function, that is called as: reportthis(String errormessage) - different functions throughout the application have try/catch blocks, that call reportthis(...) from the catch block upon errors.

I'd like to be able to specify something like reportthis(MACRO_CURRENT_METHOD_NAME + ":" + e.ToString()); - where MACRO_CURRENT_METHOD_NAME will be preprocessed by eclipse before compilation and result in the name of the method where the catch {} block calls reportthis().

So if the catch{} block happens in main(), the macro should return the string "main" (or "main()", etc.).

Is this possible? how do i go about achieving my goal?

Thank you!

Edit I wish to get this done by preprocessors in Eclipse - are those impossible? isn't it possible to perhaps write a plugin for eclipse to replace all occurrences of "MACRO_CURRENT_METHOD_NAME" with the current function name?

Upvotes: 2

Views: 887

Answers (3)

Michael Donohue
Michael Donohue

Reputation: 11876

I've not found an automated way of doing this, so have manually added a string literal that indicates the name of the caller at each invocation of the logging code.

Nokia's S40 platform is also based on Java-ME, and I know some Nokia S40 developers have made good use of Jarrut, which is available on Sourceforge, to produce stack traces by modifying the program to track the stack. You could leverage this functionality to get the calling function name in your logging code, but you may need to modify Jarrut a bit to make that work.

Upvotes: 2

Philip Helger
Philip Helger

Reputation: 1864

Java does not support Macros. But what you can do to determine the current method is something like

  final StackTraceElement aTop = Thread.currentThread ().getStackTrace ()[1];
  System.out.println (aTop.getMethodName ());

By using the element at index [1] you get the calling method, because the element at [0] is Thread.getStackTrace(). If you wrap this code in an additional method, you must adopt the array index e.g. to 2, depending on the number of wrapping methods you are using.

Upvotes: 1

Durandal
Durandal

Reputation: 20069

There is no preprocessor in java, and no macro language either.

While there are situations where either could be useful, if I understand your problem its entirely pointless, since the stack trace of the exception will already contain class and method of the place where the excetion occured.

Instead of passing a String to your "reportthis()", make a signature that just takes the exception and prints it (or just write e.printStackTrace()).

Upvotes: 0

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