Odtnhj

I need to use some way to get all fields that are annotated with a specific annotation. The annotation may be at the field or the getter (of a super class), like

public MyClass 

 @MyAnnotation
 String myName;

 int myAge;

 @MyAnnotation
 int getMyAge() return myAge; 

So I need Field getAllAnnotatedFields(MyClass.class, MyAnnotation.class).

I could write that method on my own, but I wonder, if there exists some util method. (I cannot found one in Apache commons, Guava or Google reflections).

This is my solution using Apache commons:

public static Collection<String> getPropertyNamesListWithAnnotation(Class<?> targetClass, Class<? extends Annotation> annotationClass) 
 Set<String> fieldNamesWithAnnotation = FieldUtils.getFieldsListWithAnnotation(targetClass, annotationClass).stream().map(Field::getName).collect(Collectors.toSet());
 fieldNamesWithAnnotation.addAll(MethodUtils.getMethodsListWithAnnotation(targetClass, annotationClass, true, false).stream()
 .map(Method::getName)
 .filter(LangHelper::isValidGetterOrSetter)
 .map(name -> StringUtils.uncapitalize(RegExUtils.replaceFirst(name, "^(get

private static boolean isValidGetterOrSetter(String methodName) 
 if (!StringUtils.startsWithAny(methodName, "get", "set", "is")) 
 LOG.warn("Annotated method is no valid getter or setter: '' -> Ignoring", methodName);
 return false;
 
 return true;