I currently try to use JavaParser to slightly modify existing source code. I now would like to able to track line number changes introduced by theses modifications.
As an example, assume that we have a ModifierVisitor that adds one line to the body of every while loop (the code that is processed may contain multiple loops).
Processing the following code
1 public class X {
2 public static void main(String[] args) {
3 int a = 1;
4 while(a < 100) {
5 a *= 2;
6 }
7 }
8 }
would transform it into
1 public class X {
2 public static void main(String[] args) {
3 int a = 1;
4 while(a < 100) {
5 a *= 2;
6 System.out.println("Hello, I am the new line");
7 }
8 }
9 }
Question: Is there an easy way / a built-in feature in JavaParser to create a line mapping between those two version?
I would like to have a mapping from the new line numbers to the old ones (or vice-versa). For the example above, the map should look something like:
New -> Old
1 -> 1
2 -> 2
3 -> 3
4 -> 4
5 -> 5
6 -> -1 (did not exist in the old version)
7 -> 6
8 -> 7
9 -> 8
