[Bug]: CtAnnotation Type in Annonymous Class is null

[Ruil1n]

Describe the bug

When I run ctAnnotation.getType(),it cause NPE.

Source code you are trying to analyze/transform

public class Controller{
    public Response query(Request request) {
        return execute(new A.SecureService<Request>() {
            @Override
            public void check() {

            }
        });
    }
}

Source code for your Spoon processing

import spoon.Launcher;
import spoon.reflect.declaration.CtAnnotation;
import spoon.reflect.declaration.CtClass;
import spoon.reflect.declaration.CtMethod;

import java.util.Map;

public class SpoonTest {
    public static void main(String[] args) {
        CtClass l = Launcher.parseClass("public class Controller{\n" +
                "    @Request\n" +
                "    public Response query(Request request) {\n" +
                "        return execute(new A.SecureService<Request>() {\n" +
                "            @Override\n" +
                "            public void check() {\n" +
                "\n" +
                "            }\n" +
                "        });\n" +
                "    }\n" +
                "}");
        CtAnnotation ctAnnotation = ((CtMethod)((CtClass)((Map)l.getMetadata("spoon.reflect.factory.TypeFactory-AnnonymousTypeCache")).get("110")).getTypeMembers().get(0)).getAnnotations().get(0);
        System.out.println(ctAnnotation.getType().getQualifiedName());

    }
}

Actual output

Exception in thread "main" java.lang.NullPointerException
	at SpoonTest.main(SpoonTest.java:22)

Expected output

java.lang.Override

Spoon Version

spoon-core-10.4.3-beta-6

JVM Version

11.0.2

What operating system are you using?

Mac

[Hannes Greule]

This metadata is an implementation detail, there is no guarantee that it will be present at any time.

What exactly are you trying to achieve? Most likely there's a better way.

[Ruil1n]

This metadata is an implementation detail, there is no guarantee that it will be present at any time.

What exactly are you trying to achieve? Most likely there's a better way.

I hope to get the annotation of the "check" method -> @Override

[Hannes Greule]

You can achieve that by using e.g. CtClass#getMethodsByName and CtMethod#getAnnotations.

(Note in your example, you should use CtClass<?> instead of CtClass, otherwise you might encounter confusing compilation errors)

[Ruil1n]

You can achieve that by using e.g. CtClass#getMethodsByName and CtMethod#getAnnotations.

(Note in your example, you should use CtClass<?> instead of CtClass, otherwise you might encounter confusing compilation errors)

I'm looking to directly find the 'check' method rather than by name. Is there another way? I tried CtClass#getAnonymousExecutables and CtClass#getMethods but it didn't work.

[Hannes Greule]

I'm looking to directly find the 'check' method rather than by name. Is there another way? I tried CtClass#getAnonymousExecutables and CtClass#getMethods but it didn't work.

You can also loop through the CtClass#getMethods list and check for methods that have that annotation present. Alternatively, you could query the model for the annotation and check if getParent() is a CtMethod.

If you have any problem with that, it would be helpful to see your code, the input, the result, and the expected result.