访问带注释的字段 [英] Access annotated fields

问题描述

我为我的项目制作了一个自定义注释，该注释仅用于字段，即

I made a custom Annotation for my project which will be used only with fields, that is

@MyAnnotation int myVariable

我有另一个类将负责根据变量值执行一些操作.该项目具有不确定数量的类，其中包含注释.如何使用我的注释处理器访问它们以访问值?

I have another class which will be in charge of performing some actions according to the variables values.The project has an undetermined number of classes with annotations included. How can I access them using my annotations processor in order to access the values?

我可以检查每个类中带注释的变量，但不能修改值，因为它不是对象.

I can check the annotated variables going though each class, but not modifying the value since is not an object.

关于如何做到这一点的任何建议?

any suggestion on how to do it?

提前致谢！！:)

推荐答案

int getMyVariable(Foo foo) throws IllegalArgumentException, IllegalAccessException{
 for(Field f:foo.getClass().getDeclaredFields()){
  /**
   * Ensure the RetentionPolicy of 'MyAnnotation' is RUNTIME.
   */
   if(f.isAnnotationPresent(MyAnnotation.class)){
   return f.getInt(foo);
  } 
 }
 return -1;
}

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