Javaparser method editing

Question

Let's say I have a method:

void method() {
     int i = 5;
}

I want to insert a statement at the very beginning of that method, between { and int i = 5;. How do I do that with javaparser? When visiting methods, ASTHelper.addStmt(..) inserts the statement at the end of the method.

Take a look on AOP (aspect-oriented programming): https://eclipse.org/aspectj/doc/released/progguide/starting-aspectj.html — Nikolas Charalambidis, Sep 14 '16 at 16:49
Try using `ASTRewrite` I can provide you an example as an answer if you haven't tried that before — Keshan Nageswaran, Sep 14 '16 at 16:55
No, I haven't tried that. But the thing is I have to use JavaParser. If it's not possible, then I'll gladly accept your example. — tomwyn, Sep 14 '16 at 16:59
Ok, i give up. Can't do it with javaparser and can't get ASTRewrite to work. Can you help me? — tomwyn, Sep 14 '16 at 20:10

score 3 · Answer 1 · answered Oct 28 '16 at 17:16

You can use the visitor on the MethodDeclaration

Once you have the MethodDeclaration you can get its body (getBody) and then access the list of statements composing the body (getStmts). You can your statement in the position you want by calling the add method which accept an index: add(int, N)

Note: I am referring to the upcoming version of JavaParser, 3.0.0. The API of the current version can be slightly different but you should get the idea

Source: I am a JavaParser contributor

Javaparser method editing

1 Answers1