如何在 Java 11 的注释处理器中获取带注释的方法参数的名称

Question

In Java 8, I used to be able to do

 Symbol.MethodSymbol annotatedMethod = (Symbol.MethodSymbol) annotatedElement;

and then

annotatedMethod.params

And I would get both the types of the method's parameters, AND the names of the parameters in the method declaration.

Now that import com.sun.tools.javac.code.Symbol is internal in Java 11, I can get the parameters' types by using:

ExecutableType executableType = (ExecutableType)annotatedElement.asType();
            List<? extends TypeMirror> parameters = executableType.getParameterTypes();

But how can I get the parameters' names?

Answer 1

ExecutableType is a part of the "Mirror API", which is generally about types. For inspecting elements, use the "Element API".

In your case, parameter is modeled by javax.lang.model.element.VariableElement , and the name can be obtained with element.getSimpleName() .

I guess, annotatedElement in your code is an ExecutableElement . If so, parameters' elements can be obtained via annotatedElement.getParameters() .