private void injectObject(Object target, Object o2, Field f, Class genericTypeClass) {
if (genericTypeClass.isAssignableFrom(o2.getClass())) {
List tempList = Lists.newArrayList();
Object listInstance;
try {
listInstance = ReflectionUtil.getFieldValueByName(target, f.getName());
} catch (NoSuchFieldException e) {
throw new RuntimeException("Object insertion has failed.");
} catch (IllegalAccessException e) {
throw new RuntimeException("Object insertion has failed.");
}
if (listInstance != null) {
tempList.addAll((Collection) listInstance);
}
tempList.add(o2);
ReflectionUtil.setToField(f, target, tempList);
}
}
@Override
public List<Field> load(Class clazz) throws Exception {
return ReflectionUtil.getAnnotatedDeclaredFields(clazz, ReturnListValue.class);
}
private void processRecursively(
List<Field> fieldList, Object exploredObj, Object target, int index) {
Object exploredObj1 = exploredObj;
if (exploredObj1 instanceof Object[]) {
exploredObj1 = Arrays.asList((Object[]) exploredObj1);
}
if (exploredObj1 instanceof Collection<?>) {
Collection<?> obj = (Collection<?>) exploredObj1;
for (Object o1 : obj) {
if (o1 == null) {
continue;
}
processRecursively(fieldList, o1, target, index);
}
return;
}
// handling leaf - last element in the tree.
if (fieldList.size() == index + 1) {
Object o2 = null;
// when scanning arrays & collections, it's possible to run into an object
// we are not interested in. and as a result exception will be raised.
// this case happens when an object implements same interface(or abstract class) as
// ExploredObject.
for (Field f : exploredObj1.getClass().getDeclaredFields()) {
if (fieldList.get(index).getName().equals(f.getName())) {
try {
o2 = fieldList.get(index).get(exploredObj1);
} catch (IllegalAccessException e) {
// TODO do I need this exception..??? Doublecheck!!!
// CentralExceptionHandler.handleException(e);
}
break;
}
}
if (o2 == null) {
return;
}
// handling @ReturnValue
List<Field> annotatedDeclaredFields = returnValueCache.getUnchecked(target.getClass());
for (Field f : annotatedDeclaredFields) {
if (f.getType().isInstance(o2)) {
ReflectionUtil.setToField(f, target, o2);
}
}
// handling @ReturnListValue
List<Field> returnValueListAnnotation = returnListValueCache.getUnchecked(target.getClass());
for (Field f : returnValueListAnnotation) {
Type genericType = f.getGenericType();
Class genericTypeClass =
(Class) ((ParameterizedType) genericType).getActualTypeArguments()[0];
if (o2.getClass().isArray()) {
for (Object o3 : (Object[]) o2) {
injectObject(target, o3, f, genericTypeClass);
}
} else if (Collection.class.isAssignableFrom(o2.getClass())) {
for (Object o3 : (Collection) o2) {
injectObject(target, o3, f, genericTypeClass);
}
} else {
injectObject(target, o2, f, genericTypeClass);
}
}
return;
}
// handling node which is not leaf.
Object o1;
try {
o1 = fieldList.get(index).get(exploredObj1);
} catch (IllegalAccessException e) {
throw new RuntimeException("Exception occurred when extracting field value from object", e);
}
if (o1 == null) {
return;
}
processRecursively(fieldList, o1, target, index + 1);
}