// helper helper
private static boolean handleLinkedList(Field f1, Object o1, Field f2, Object o2) {
try {
LinkedList<?> l1 = (LinkedList<?>) f1.get(o1);
LinkedList<?> l2 = (LinkedList<?>) f2.get(o2);
int length = l1.size();
for (int i = 0; i < length; i++) {
if (!(structurallyEqual(l1.get(i), l2.get(i)))) {
return false;
}
}
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
return true;
}
/*
* A helper for sanity checking de-/serialization.
* We test two objects to be structurally equal by means of reflection.
*/
public static boolean structurallyEqual(Object o1, Object o2) {
try {
if (o1.getClass().getName().equals(o2.getClass().getName())) {
for (Class<?> obj = o1.getClass(); !obj.equals(Object.class); obj = obj.getSuperclass()) {
Field[] f1 = obj.getDeclaredFields();
Field[] f2 = obj.getDeclaredFields();
for (int i = 0; i < f1.length; i++) {
f1[i].setAccessible(true);
f2[i].setAccessible(true);
// check if fields are primitive types and compare
if ((f1[i].getType().isPrimitive() && f2[i].getType().isPrimitive())) {
if (!(f1[i].getName().equals(f2[i].getName()))) return false;
else {
if (!(f1[i].get(o1).equals(f2[i].get(o2)))) {
return false;
}
}
// otherwise, they must be objects
} else {
// to be equal, both can not be null
if (f1[i].get(o1) != null && f2[i].get(o2) != null) {
// check, if they are of the same class
if (f1[i].get(o1).getClass().getName().equals(f2[i].get(o2).getClass().getName())) {
// check if the class is Double,
// Integer or String
if (check(f1[i].get(o1).getClass().getName())) {
// compare values
if (!(f1[i].get(o1).equals(f2[i].get(o2)))) {
return false;
}
} else {
// special case, if the object is an
// linked list
if (f1[i].get(o1).getClass().getName().equals("java.util.LinkedList")) {
if (!(handleLinkedList(f1[i], o1, f2[i], o2))) {
return false;
}
} else {
// otherwise, compare the objects
structurallyEqual(f1[i].get(o1), f2[i].get(o2));
}
}
} else {
return false;
}
} else {
// if one of them is null, the objects can not
// be equal
if (f1[i].get(o1) == null && f2[i].get(o2) != null) {
return false;
}
if (f1[i].get(o1) != null && f2[i].get(o2) == null) {
return false;
}
}
}
}
}
} else {
return false;
}
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
return true;
}