Obtaining the fully qualified name from an Annotation using Eclipse JDT AST

Question

I am using the Eclipse JDT to build AST for Java source code, so I can do some code analysis. Currently I would like to obtain the fully qualified name of an annotation. Consider the code below:

import javax.persistence.Entity; 

@Entity
public class Class1

If I visit this Compilation Unit, the @Entity is a MarkerAnnotation. And I can do some analysis on it. However I am unable to obtain the Fully qualified name. I would like to obtain "javax.persistence.Entiy". I have tried several ways, but with no success.

public boolean visit(MarkerAnnotation node) {
        node.getTypeName(); //returns the simple name
        node.getTypeName().getFullyQualifiedName();// I thought this would print javax.persistence.Entiy, 
                                                   // but it only prints "Entity"
        node.resolveTypeBinding().getName(); //Prints "Entity"
        node.resolveTypeBinding().getBinaryName(); // Prints "Entity"
        node.resolveAnnotationBinding().getName(); //Prints "Entity"
        return super.visit(node);
    }

I have also tried to cast MarkerAnnotation to Annotation, but I am still unable to get fully qualified name. During debugging sesssions, I had no success either navigating this node

I was able to get the fully qualified name using the imports() method of the CompilationUnit. I did some String manipulations on them, combining with the annotations simple name. However, I feel this is sort of hacky, and I need to look at every import, even ones that are not related to annotations.

What I would like is to obtain the fully qualified name directly from the node, i.e, from the MarkerAnnotation, NormalAnnotation and SingleMemberAnnotation. Is there any way to achieve this? What Am I missing here?

Thanks in advance!

Stephan Herrmann Stephan Herrmann · Accepted Answer · 2019-11-21T13:42:25

From the javadoc of Annotation.resolveAnnotationBinding():

Note that bindings (which includes resolved annotations) are generally unavailable unless requested when the AST is being built.

So please check how you configure ASTParser, see ASTParser.setResolveBindings(boolean)

Obtaining the fully qualified name from an Annotation using Eclipse JDT AST

1 Answers