[jira] Commented: (TAPESTRY-552) contrib:Table Beta 4 - Null Pointer Exception

["Richard Hensley (JIRA)" <ta...@jakarta.apache.org>]

    [ http://issues.apache.org/jira/browse/TAPESTRY-552?page=comments#action_12318671 ] 

Richard Hensley commented on TAPESTRY-552:
------------------------------------------

I think there is a bug in the hivemind declaration of the SerializableAdaptor. When my application tries to unsqueeze a  serializable object, I get the following stack dump.

# org.apache.tapestry.util.io.ResolvingObjectInputStream.resolveClass(ResolvingObjectInputStream.java:50)
# java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1513)
# java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
# java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)
# java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
# java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
# org.apache.tapestry.util.io.SerializableAdaptor.unsqueeze(SerializableAdaptor.java:125)
# $SqueezeAdaptor_105ac0ee43f.unsqueeze($SqueezeAdaptor_105ac0ee43f.java)
# org.apache.tapestry.util.io.DataSqueezerImpl.unsqueeze(DataSqueezerImpl.java:181)
# $DataSqueezer_105ac0ee32b.unsqueeze($DataSqueezer_105ac0ee32b.java)

The relavent information is that the resolving object input stream has a null _resolver member. This is because the SerializableAdaptor has a null _resolver member. I think this is because either the hivemind delcaration is wrong, or auto-wiring is not working in this case. The hivemind declaration is in tapestry.data.xml:

  <service-point id="SerializableAdaptor" interface="SqueezeAdaptor">
    
    Converts an object down to a compressed byte stream, and then to a MIME-like string representation.
    
    <invoke-factory>
      <construct class="SerializableAdaptor"/>
    </invoke-factory>
  </service-point>

According to the Hivemind documentation a ClassResolver is auto-wired to a property named classResolver, SerialziableAdaptor has a property named Resolver, and therefore will not auto-wire.

Any comments on this problem? 

I'm going to add a JIRA issue for this with this email in it.



> contrib:Table Beta 4 - Null Pointer Exception
> ---------------------------------------------
>
>          Key: TAPESTRY-552
>          URL: http://issues.apache.org/jira/browse/TAPESTRY-552
>      Project: Tapestry
>         Type: Bug
>   Components: Contrib
>     Versions: 4.0
>  Environment: jdk1.5, tapestry 4 beta 4
>     Reporter: Joe Goldwasser

>
> With the contrib:Table and beta 4 I am also getting Unable to convert 
> 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 
> back into an object in For component.
> Looks like a null pointer at
> org.apache.tapestry.util.io.ResolvingObjectInputStream.resolveClass(ResolvingObjectInputStream.java:50)

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