[Hessianobjc-user] solved - was Re: enum

[Tore H. <ha...@pv...>]

Hello.

Okay, I found a solution. Looks like hessian serialize a enum variable  
as a Map with a single key, but no value. Here is a working patch that  
fixes my problem.

Index: BBSHessianDecoder.m
===================================================================
--- BBSHessianDecoder.m	(revision 92)
+++ BBSHessianDecoder.m	(working copy)
@@ -251,6 +251,11 @@
              //read the type
              id key = [self decodeObjectForCode:objectTag];
              [dataInputStream read:&objectTag maxLength:1];
+            if(objectTag == 'z') {
+                // java enum are serialized by hessian using a Map  
with a single key, but no value
+                [dict setObject:[NSNull null] forKey:key];
+                break;
+            }
              id value = [self decodeObjectForCode:objectTag];
              if(key != nil) {
                  if(value == nil) {


Regards,
  - Tore.

On Dec 17, 2007, at 01:17, Tore Halset wrote:

> Hello.
>
> Sorry, but the map is not related to TreeMap, but encoding a enum.
> This enum is burryed far down in the object graph, but I have isolated
> this by trying everything with the transient-keyword.
>
> The problem is this instanse variable:
>     protected LifecycleEvent callbackType;
>
> This is how LifecycleEvent look like:
> public enum LifecycleEvent {
>     PRE_PERSIST, PRE_REMOVE, PRE_UPDATE, POST_PERSIST, POST_REMOVE,
> POST_UPDATE, POST_LOAD;
> }
>
> Here is a output from tcpdump.
>
>         0x0410:  0000 074d 7400 296f 7267 2e61 7061
> 6368  ...Mt.)org.apach
>         0x0420:  652e 6361 7965 6e6e 652e 6d61 702e 4361
> e.cayenne.map.Ca
>         0x0430:  6c6c 6261 636b 4465 7363 7269 7074 6f72
> llbackDescriptor
>         0x0440:  5300 0c63 616c 6c62 6163 6b54 7970 654d
> S..callbackTypeM
>         0x0450:  7400 256f 7267 2e61 7061 6368 652e 6361  t.
> %org.apache.ca
>         0x0460:  7965 6e6e 652e 6d61 702e 4c69 6665 6379
> yenne.map.Lifecy
>         0x0470:  636c 6545 7665 6e74 5300 0b50 5245 5f50
> cleEventS..PRE_P
>         0x0480:  4552 5349 5354 7a53 000f 6361 6c6c 6261
> ERSISTzS..callba
>         0x0490:  636b 4d65 7468 6f64 7356 7400 176a 6176
> ckMethodsVt..jav
>         0x04a0:  612e 7574 696c 2e4c 696e 6b65 6448 6173
> a.util.LinkedHas
>         0x04b0:  6853 6574 6c00 0000 007a 7a4d 7400 296f
> hSetl....zzMt.)o
>         0x04c0:  7267 2e61 7061 6368 652e 6361 7965 6e6e
> rg.apache.cayenn
>         0x04d0:  652e 6d61 702e 4361 6c6c 6261 636b 4465
> e.map.CallbackDe
>         0x04e0:  7363 7269 7074 6f72 5300 0c63 616c 6c62
> scriptorS..callb
>         0x04f0:  6163 6b54 7970 654d 7400 256f 7267 2e61  ackTypeMt.
> %org.a
>         0x0500:  7061 6368 652e 6361 7965 6e6e 652e 6d61
> pache.cayenne.ma
>         0x0510:  702e 4c69 6665 6379 636c 6545 7665 6e74
> p.LifecycleEvent
>         0x0520:  5300 0a50 5245 5f52 454d 4f56 457a 5300
> S..PRE_REMOVEzS.
>
> Anyone know where to start on the objc side of it?
>
>  - Tore.
>
> On Dec 13, 2007, at 01:17, Tore Halset wrote:
>
>> Hello.
>>
>> I was able to decode java.util.TreeMap with HessianObjC before, but
>> now (after leopard?), they are just decoded as null. The TreeMap is a
>> member of a mapped class.
>>
>> Anyone else seen something like this?
>>
>> Regards,
>> - Tore.
>>
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