[ http://mc4j.org/jira/browse/STS-247?page=comments#action_10435 ]
Simon commented on STS-247:
---------------------------
(continued from above)
example stack trace:
> The stack trace:
>
> net.sourceforge.stripes.exception.StripesRuntimeException: Could not
> build JavaScript for object. An exception was thrown while trying to
> convert a property from Java to JavaScript. The object being converted
> is: com.kembuco.autotracker.model.Automobile <at> b36ee3db
> at
> net.sourceforge.stripes.ajax.JavaScriptBuilder.build(JavaScriptBuilder.java:154)
> at
> net.sourceforge.stripes.ajax.JavaScriptResolution.execute(JavaScriptResolution.java:50)
> at
> net.sourceforge.stripes.controller.DispatcherServlet.doPost(DispatcherServlet.java:168)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
The problem here is that rather than exporting the actual object the loaded
object is enhanced by Hibernate with a variety of internal attributes that
don't export properly for various reasons.
Rather than suggesting that we specifically make Stripes work with Hibernate,
I'd suggest that a simple generic interface be supported to allow the caller to
suppy an arbitrary algorithm for excluding properties.
I have attached a patch which illustrates an implementation of this which
allows Hibernate objects to export correctly simply by ignoring the internal
hibernate properties by excluding them by name.
Using this patch, Hibernate objects can be passed to JavaScriptBuilder
successfully with a construct like:
return new JavaScriptResolution(hibnerateObject, new ExcludeByName(new
String[] {
"callback",
"callbacks",
"hibernateLazyInitializer"
}));
Hope this is helpful. I think it's important for Stripes to be able to send
back Hibernate objects as Javascript.
(see separately attached patch file)
> JavaScriptBuilder does not work with Objects loaded by Hibernate
> ----------------------------------------------------------------
>
> Key: STS-247
> URL: http://mc4j.org/jira/browse/STS-247
> Project: Stripes
> Issue Type: Bug
> Affects Versions: Release 1.4, Release 1.3.2
> Environment: Win32/JDK1.5
> Reporter: Simon
> Assigned To: Tim Fennell
>
> If an object is loaded via Hibernate and then passed to the
> JavaScriptBuilder, it throws various exceptions.
> See http://article.gmane.org/gmane.comp.java.stripes.user/769/ for a report
> of the error - to summarize:
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