How to get class that annotation applied to in Java Annotation Processor?

Question

I wrote a custom Java Annotation Processor that if applied to a class, generates a class with name of annotated class fields.

While executing, I can find name of annotated class (like "com.package.Person") with (DeclaredType)annotatedElement.asType() but Unable to get Class<com.package.Person> to find its fields.

I tried to load class with its full name with Class.forName(com.package.Person) that throws an exception ClassNotFoundException: com.package.Person

How can I get Class<Person>?

The classes do not (jet) exist (you are in the process of compiling them). Take a look into Types. — Turing85
– Turing85, Commented Jul 28, 2019 at 7:11
Lombok uses the annotation processor only "as a door in" and hijacks the AST. See this question for details. — Turing85
– Turing85, Commented Jul 28, 2019 at 7:33

Homayoun Behzadian · Accepted Answer · 2019-07-31 05:23:56Z

1

Finally, I find I can't get Class<?> but I can get fields by var elements = element.getEnclosedElements() that their kind is FIELD

Also getting superclass is possible by ((TypeElement) rootElement).getSuperclass()

answered Jul 31, 2019 at 5:23

Homayoun Behzadian

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Super Shark · Accepted Answer · 2019-07-28 07:51:58Z

0

May be Name is Wrong?

here's code. And it Work.

Class<?> testClass = Class.forName("PackageName.ClassName");
Object instance = testClass.newInstance();

com.package.Person -> package.Person. if not work, I'm worng. Sorry.

edited Jul 28, 2019 at 7:51

answered Jul 28, 2019 at 7:32

Super Shark

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2 Comments

Turing85 Over a year ago

This will not work. The class does not jet exist since you are in the process of compiling.

Homayoun Behzadian Over a year ago

I wrote in question that Class.forName() throws exception

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