How can I get annotations of a method parameter?

[Liyw979]

interface XXXDao {
    int sqlQuery(@Param("a") Long a, @Param("b") String b, @Param("c") Long c);
}

[swissiety]

You can try to access it via the Local that is stored in the IdentityStmt for the parameters; try casting the Local to JavaLocal and then there is a getter for Annotations.

[Liyw979]

sqlQuery is abstract and implemented by mybatis dynamiclly. So I am not able to access the IdentityStmt

[swissiety]

Oh I see - then we have a problem. I'll create an Issue that this case is not covered.

[JonasKlauke]

First you have to get the method:
view.getMethod( JavaIdentifierFactory.getInstance() .getMethodSignature( view.getClass("XXXDao"), "sqlQuery", "int", Arrays.asList("Long", "String", "Long"))
then you get the method body of the method
methodFromBefore.getBody()
then you can get the parameters
JavaLocal parameterLocal = (JavaLocal) body.getParameterLocal(0); parameterLocal.getAnnotations()

you can find an example in the AnnotationUsageTest in method testAnnotationOnLocal()

Edit: i have not tested the code above. there might be some mistakes

[turn1tup]

It really work?
"There is no corresponding body if the method is not concrete i.e."
I met this error.

[Liyw979]

I think there should be a class Parameter to model this, and allow user to do like

• method.getParameter(index).getAnnotations
• method.getParameter(index).getName