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From Adam Hardy <ahardy.str...@cyberspaceroad.com>
Subject Re: ClassCastException using the DynaValidatorForm
Date Tue, 08 Jul 2003 08:17:01 GMT
I missed your second post. My mailer didn't thread it. So what is struts 
putting in 'instance' if it's not a dynabean?

I don't suppose it would be so simple as the wrong form specified in the 
action mapping?

Michael Muller wrote:
> 
> Here's the struts source that's throwing the exception:
> 
> // Can we recycle the existing form bean instance (if there is one)?
> if (instance != null) {
>     if (config.getDynamic()) {
>         String className = ((DynaBean) instance).getDynaClass().getName();
>         if (className.equals(config.getName())) {
> 
> Apparently, "instance" is not a DynaBean.  It would appear that 
> something other than a DynaBean is being stored where struts expects to 
> find a DynaBean.
> 
> Does this help anyone figure out what I'm doing wrong?
> 
>   -- Mike
> 
> 
> Adam Hardy wrote:
> 
>> I got ClassCast exceptions, but not necessarily this one, because I 
>> was using field class types other than Strings in my DynaActionForm. 
>> DynaValidator will only validate strings, btw.
>>
>> Adam
>>
>> Michael Muller wrote:
>>
>>>
>>> I've got the validation framework working for me using my own form 
>>> bean which is derived from ValidatorForm.  I changed the form bean to 
>>> be a DynaValidatorForm, and now I get a ClassCastException, the guts 
>>> of which is appended below.
>>>
>>> What gives?  Am I using the wrong validator form class?  Did I 
>>> neglect to make some other configuration change?
>>>
>>> I'm using Tomcat 4.1, Struts 1.1 final, and jdk 1.4.1.
>>>
>>>   -- Mike
>>>
>>>
>>>
>>> java.lang.ClassCastException
>>>     at 
>>> org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:783) 
>>>
>>>     at 
>>> org.apache.struts.action.RequestProcessor.processActionForm(RequestProcessor.java:364)

>>>
>>>     at 
>>> org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:253)

>>>
>>>     at 
>>> org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
>>>     at 
>>> org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
>>>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
>>>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
>>>     at 
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)

>>>
>>>     at 
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) 
>>>
>>>     at 
>>> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
>>>     at 
>>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) 
>>>
>>>     at 
>>> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
>>>     at 
>>> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415) 
>>>
>>>     at 
>>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

>>>
>>>     at 
>>> org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)

>>>
>>>     at 
>>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) 
>>>
>>>     at 
>>> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
>>>     at 
>>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

>>>
>>>     at 
>>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) 
>>>
>>>     at 
>>> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
>>>     at 
>>> org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
>>>     at 
>>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:432) 
>>>
>>>     at 
>>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)

>>>
>>>     at 
>>> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534) 
>>>
>>>     at 
>>> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)

>>>
>>>     at java.lang.Thread.run(Thread.java:536)
>>>
>>>
>>>
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>>>
>>
>>
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> 
> 
> 
> 
> 
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> 
> 


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