Hi,
This is a bug in deserialization in beta4 -- see
http://issues.apache.org/jira/browse/TAPESTRY-552
The bug is fixed in CVS and this would not happen in beta5, but there is
workaround in the meantime (as described in the bug comments):
Create (if necessary) a WEB-INF/hivemodule.xml for your application.
Add an override for the service:
<module id="app" version="4.0.0">
<implementation service-id="tapestry.data.SerializableAdaptor">
<invoke-factory>
<construct class="org.apache.tapestry.util.io.SerializableAdapter"
class-resolver-property="resolver"/>
</invoke-factory>
</implementation>
</module>
Dustin Frazier wrote:
I'm trying to use the new For component within a Form, and I'm running
into a strange error. I have some generic code which renders an edit
form based on custom annotations I've added to my persistent objects
to drive the property names, labels, etc. The source for the For
component is a List of my custom Property annotations. Right now, it
looks something like:
<form jwcid="[EMAIL PROTECTED]">
<table>
<tr jwcid="@For" source="ognl:properties" value="ognl:prop"
element="tr">
<td align="right">
<strong><span jwcid="@Insert" value="ognl:prop.label()"/>:
</td>
<td>
<span jwcid="@RenderBlock" block="ognl:blockForProperty"/>
<span jwcid="[EMAIL PROTECTED]">
<input jwcid="@TextField" value="ognl:object[prop.name()]"/>
</span>
...
<span jwcid="[EMAIL PROTECTED]">
<span jwcid="@Insert" value="ognl:prop.name()"/>
</span>
</td>
</tr>
</table>
</form>
If I use the Foreach component in the above loop over my Property
annotations, everything works fine. If I use the For component,
however, I get a strange error when I submit the form (*extremely*
long string shortened by me):
Unable to convert
ZH4sIAAAAAAAAAH2RPUsDQRCG584EvwJJChU7G7G7A7FLoRIICZzRRguxcHI38U43u8fu5rwT9N/Y+SMids...
back into an object in For component.
Unable to decode stream: java.lang.NullPointerException
java.lang.NullPointerException
Stack Trace:
*
org.apache.tapestry.util.io.ResolvingObjectInputStream.resolveClass(ResolvingObjectInputStream.java:50)
*
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1538)
*
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
*
java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1502)
*
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1457)
*
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
* java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
* java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
*
org.apache.tapestry.util.io.SerializableAdaptor.unsqueeze(SerializableAdaptor.java:125)
...
If I look at the page source, there are two hidden values with the
name "$For":
<input type="hidden" name="$For" value="V"/>
<input type="hidden" name="$For"
value="ZH4sIAAAAAAAAAH2RPUsDQRCG584EvwJJChU7G7G7A7FLoRIICZzRRguxcHI38U43u8fu5rwT9N/Y+SMids..."/>
Anyone have any idea what's going on? Could it be some kind of
converter problem since I'm using raw Annotation objects in my source
list?
Dustin
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