Need help with source code line number

Hi.

I have a project where I want to map classes, the class' method signatures and
method invokations within the class to the corresponding line numbers in the
java source. Basically what I want to do is to build a library (db) where I can
make lookups of type: who overrides this method, where is this method called
from, etc.

By extending ClassAdapter I find the method "properties" of the class and by
extending Method adapter I can find method invocations and the line number
where the method invokation took place.
I can however not find a way to get the line numbers for the method itself.
E.g. If I have a class like
class Foo {
  public String toString() {
    return "foo".toUpperCase();
  }
}
then I want to be able to somehow find out that the "public String toString()"
starts on line 2 of the class and ends at line 4.

Any ideas on what to do? I'm using ASM 3.3.1 (simply because I couldn't find
4RC2 in any maven repo).

Best regards,
Jörgen

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