public static Collection<String> getAllOutputNames(Class<?> clz) {
Collection<String> result = new Vector<String>();
for (Field f : clz.getDeclaredFields()) {
if (f.isAnnotationPresent(Out.class)) {
Out outputAnnotation = f.getAnnotation(Out.class);
result.add(outputAnnotation.name());
}
}
return result;
}
/**
* Based on annotated output field name that we wanted to access, using this utility method we can
* get the value of the current field.
*
* @param instance
* @param outputName
* @return
* @throws IllegalArgumentException
* @throws IllegalAccessException
*/
public static Object getOutputField(Object instance, String outputName)
throws IllegalArgumentException, IllegalAccessException {
Object result = null;
for (Field f : instance.getClass().getDeclaredFields()) {
if (f.isAnnotationPresent(Out.class)) {
Out outputAnnotation = f.getAnnotation(Out.class);
if (outputName.equals(outputAnnotation.name())) {
return f.get(instance);
}
}
}
return result;
}