IllegalArgumentException: argument type mismatch

I am getting the following exception while submitting my form.

Error Stack Trace

java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.commons.beanutils.PropertyUtils.setSimpleProperty(PropertyUtils.java:1789)
at org.apache.commons.beanutils.PropertyUtils.setNestedProperty(PropertyUtils.java:1684)
at org.apache.commons.beanutils.PropertyUtils.setProperty(PropertyUtils.java:1713)
at org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:1019)
at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:808)
at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1252)
at org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:821)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254)
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 weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:971)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:402)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:305)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6354)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3635)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)

I have located the line of code which triggers this. It is in the second line of jsp code below :

If I mask that line, then I do not get this error. I am not sure what's going wrong here.

Above all, the Multiselect list box gets properly loaded with the values I set in my action class.

My code snippets are as below :

AccountGroupForm.java

<html: OptionsCollection property="planList" label="columnName" value="columnCd"/>

Not 100% sure, but I think you need to use name="planList" instead of property ="planList"

Hope this works!

-Nate

Hi,
I ussually using code like this

hope this help and correct me if I am wrong

thanks
daniel

Thanks Guys.

But my tag syntax is correct in all respect. Infact I have used it in the past without any problems.

In , the form bean contains an array of objects in the property planList that we want the label and values to come from. (Ref. Struts KickStart - Tuener & Bedell)

This is some other issue.

Peter

Your tag is trying to call getPlanList() on your ActionForm. Your code shows getPlanList() in the bean.

And judging by the error type, I believe your ActionForm might have a getPlanList() but with parameters. Otherwise the error would be that no method was found.

Thanks Marc.

My ActionForm does not have any getPlanList() with parameters. It only has getPlanList() with no parameters.

Peter.

Found the problem!

In the above, the variable <authorizedPlans> was defined by me as ArrayList in the form. While debugging, I found out that it should be of type String[].

I feel the error logging of struts is not that good. I had not clue that this was the variable causing the problem.

Anyway, the problem has been resolved.

Thanks to all for your help.

Peter

[ February 16, 2005: Message edited by: Peter Vennel ]
[ February 16, 2005: Message edited by: Peter Vennel ]

I am facing a similar problem

<nested:select multiple="true" property="answer">
<nested:nest property="options">
<nested:iterate property="option">
<option value='<nested:write property="property" />'><nested:write property="labelProperty" /></option><br>
</nested:iterate>
</nested:nest>
</nested:select>

The property "answer" is a string array, still i get the same error "java.lang.IllegalArgumentException: argument type mismatch" on submitting

Any idea

Thanks
Zafer