Recursive Datastructure detected even if there isn't one

[GoogleCodeExporter]

Assume the following class structure:

    A
   / \
  B   C
  |   |
  D   D

A,B,C,D are classes. A has two fields of type B and C. Both B and C have a
field of type D.

EqualsVerifier.forClass(A.class).verify();

throws the exception:

java.lang.AssertionError: Recursive datastructure. Add prefab values for
one of the following classes: [class test.A, class test.B, class test.D,
class test.C].

I'm not sure if this is intentional, but if it is, then the error message
is misleading.

The problem might have something to do with
Instantiator.recursiveCallStack, which is not really a stack since elements
are added but never removed. Also the same recursiveCallStack instance is
used for the complete tree, but prefabValues is cloned. Therefore on the
second leg, D is not in prefabValues but in recursiveCallStack.

Cloning recursiveCallStack within createPrefabValues() did the trick, but I
don't know if this has any side effects (at least it still passes all tests).

Instantiator i = new Instantiator(type, prefabValues, (LinkedHashSet)
recursiveCallStack.clone());

I added the A,B,C,D example as an attachement.

-Stefan

Original issue reported on code.google.com by [email protected] on 12 Jan 2010 at 5:43

Attachments:

• test.zip

[GoogleCodeExporter]

Original comment by [email protected] on 24 Jan 2010 at 4:51

• Changed state: Fixed
• Added labels: ****
• Removed labels: ****