ReflectionUtil.java

package com...test;

import lombok.AccessLevel;
import lombok.NoArgsConstructor;

import java.lang.reflect.Field;

@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class ReflectionUtil {
    public static void setFieldValue(Object object, String fieldName, Object valueTobeSet)
            throws NoSuchFieldException, IllegalAccessException {
        Field field = getField(object.getClass(), fieldName);
        field.setAccessible(true);
        field.set(object, valueTobeSet);
    }

    public static Object getPrivateFieldValue(Object object, String fieldName)
            throws NoSuchFieldException, IllegalAccessException {
        Field field = getField(object.getClass(), fieldName);
        field.setAccessible(true);
        return field.get(object);
    }

    private static <T> Field getField(Class<T> mClass, String fieldName)
            throws NoSuchFieldException {
        try {
            return mClass.getDeclaredField(fieldName);
        } catch (NoSuchFieldException e) {
            Class<?> superClass = mClass.getSuperclass();
            if (superClass == null) {
                throw e;
            } else {
                return getField(superClass, fieldName);
            }
        }
    }
}