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Problem with ASTVisitor [message #509845]

Mon, 25 January 2010 10:24

Eclipse User

I'm trying to find all ReturnStatement-s in a given MethodDeclaration:

MethodDeclaration decl = ... 
System.out.println("decl = " + decl);
final List<ReturnStatement> returnStmts = new ArrayList<ReturnStatement>();

ASTVisitor visitor = new ASTVisitor() {
	@Override
	public boolean visit(ReturnStatement node) {
		System.out.println("visiting " + node);
		returnStmts.add(node);
		return true;
	}
	@Override
	public void preVisit(ASTNode node) {
		System.out.println("visiting " + node);
	}
};
visitor.visit(decl);

I get empty list and only following output:

decl = static String getWhereClause(){
  return "where 1=2";
}

this shows that "decl" is OK, and it has a ReturnStatement.

Any idea what's wrong here?

Re: Problem with ASTVisitor [message #509912 is a reply to message #509845]

Mon, 25 January 2010 13:30

Eclipse User

Aivar Annamaa wrote:

> I'm trying to find all ReturnStatement-s in a given MethodDeclaration:
>
>
> MethodDeclaration decl = ...
> System.out.println("decl = " + decl);
> final List<ReturnStatement> returnStmts = new
> ArrayList<ReturnStatement>();
>
> ASTVisitor visitor = new ASTVisitor() {
> @Override
> public boolean visit(ReturnStatement node) {
> System.out.println("visiting " + node);
> returnStmts.add(node);
> return true;
> }
> @Override
> public void preVisit(ASTNode node) {
> System.out.println("visiting " + node);
> }
> };
> visitor.visit(decl);

This is, what you are invoking here (see ASTVisitor):

public boolean visit(MethodDeclaration node) {
return true;
}

:)

Try:
decl.accept(visitor);

HTH,
Stephan

Re: Problem with ASTVisitor [message #510046 is a reply to message #509912]

Tue, 26 January 2010 05:55

Eclipse User

Stephan Herrmann wrote on Mon, 25 January 2010 13:30

This is, what you are invoking here (see ASTVisitor):

public boolean visit(MethodDeclaration node) {
return true;
}

Smile