java 访问带注释的字段
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Access annotated fields
提问by biquillo
I made a custom Annotation for my project which will be used only with fields, that is
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
@MyAnnotation int myVariable
@MyAnnotation int myVariable
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 can check the annotated variables going though each class, but not modifying the value since is not an object.
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。
any suggestion on how to do it?
关于如何做到这一点的任何建议？
Thanks in advance!! :)
提前致谢！！:)
回答by u290629
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;
}
