ObjectPropertyUtils { public static Method getReadMethod(Class<?> beanClass, String propertyName) { return getMetadata(beanClass).readMethods.get(propertyName); } private  ObjectPropertyUtils(); static Map<String, PropertyDescriptor> getPropertyDescriptors(Class<?> beanClass); static PropertyDescriptor getPropertyDescriptor(Class<?> beanClass, String propertyName); static void registerPropertyEditors(PropertyEditorRegistry registry); static Set<String> getReadablePropertyNames(Class<?> beanClass); static Method getReadMethod(Class<?> beanClass, String propertyName); static Method getWriteMethod(Class<?> beanClass, String propertyName); static void copyPropertiesToObject(Map<String, String> properties, Object object); static Class<?> getPropertyType(Class<?> beanClass, String propertyPath); static Class<?> getPropertyType(Object object, String propertyPath); static Set<String> getReadablePropertyNamesByType(Object bean, Class<?> propertyType); static Set<String> getReadablePropertyNamesByType(Class<?> beanClass, Class<?> propertyType); static Set<String> getReadablePropertyNamesByAnnotationType(Object bean,
            Class<? extends Annotation> annotationType); static Set<String> getReadablePropertyNamesByAnnotationType(
            Class<?> beanClass, Class<? extends Annotation> annotationType); static Set<String> getReadablePropertyNamesByCollectionType(Object bean, Class<?> collectionType); static Set<String> getWritablePropertyNames(Object bean); static Set<String> getReadablePropertyNamesByCollectionType(Class<?> beanClass, Class<?> collectionType); @SuppressWarnings("unchecked") static T getPropertyValue(Object object, String propertyPath); static String getPropertyValueAsText(Object bean, String path); static PropertyEditorRegistry getPropertyEditorRegistry(); static Class<?> getPrimitiveType(Class<?> type); static PropertyEditor getPropertyEditor(Object bean, String path); static PropertyEditor getPropertyEditor(Class<?> propertyType); static void initializeProperty(Object object, String propertyPath); static void setPropertyValue(Object object, String propertyPath, Object propertyValue); static void setPropertyValue(Object object, String propertyPath, Object propertyValue, boolean ignoreUnknown); static boolean isReadableProperty(Object object, String propertyPath); static boolean isWritableProperty(Object object, String propertyPath); static List<Field> getAllFields(List<Field> fields, Class<?> type, Class<?> stopAt); static Type getComponentType(Type type); static Class<?> getUpperBound(Type valueType); static Type findGenericType(Class<?> sourceClass, Class<?> targetClass); static String[] splitPropertyPath(String path); static String getPathTail(String path); static String removePathTail(String path); static String getCanonicalPath(String path);  }
@Test public void testGetterInInterfaceOrSuperHasWiderType() { Method readMethod = null; readMethod = ObjectPropertyUtils.getReadMethod(ComparableHolderImpl.class, "comparable"); assertEquals(Integer.class, readMethod.getReturnType()); readMethod = ObjectPropertyUtils.getReadMethod(NumberedImplOne.class, "number"); assertEquals(Integer.class, readMethod.getReturnType()); readMethod = ObjectPropertyUtils.getReadMethod(ConcreteNarrowedNumberHolder.class, "number"); assertEquals(Integer.class, readMethod.getReturnType()); readMethod = ObjectPropertyUtils.getReadMethod(ConcreteNarrowedNumberHolderSub.class, "number"); assertEquals(Integer.class, readMethod.getReturnType()); for (int i = 0; i < 1; ++i) { readMethod = ObjectPropertyUtils.getReadMethod(KualiPercentHolder.class, "decimal"); } if (readMethod.getReturnType() == KualiDecimal.class) { LOG.info("I bet you're using JDK6 on Linux"); } readMethod = ObjectPropertyUtils.getReadMethod(Base.class, "value"); assertEquals(Number.class, readMethod.getReturnType()); readMethod = ObjectPropertyUtils.getReadMethod(Int.class, "value"); assertEquals(Integer.class, readMethod.getReturnType()); }