IllegalArgumentException: argument type mismatch

["Efftinge, Sven" <SE...@lohndirekt.de>]

Hi,
i have an ActionForm wich has only one Attribute. This Attribute is a
DataObject (a serializable Bean wich presents the Data of an EntityBean).

// ActionForm

public class AccountGruppeForm extends ActionForm {
    
    private AccountGruppeData accountGruppe = new AccountGruppeData();

    public AccountGruppeData getAccountGruppe() {
        return this.accountGruppe;
    }    
    
    public void setAccountGruppe(AccountGruppeData accountGruppe) {
        this.accountGruppe = accountGruppe;
    }
}

The Dataobject AccountGruppeData has 9 fields with a getter and a setter
method.

My Struts-config.xml looks like this (I am using Struts 1.1-b1):

<struts-config>
<!-- ============ Form-Beans ============================== -->
  <form-beans>
    <form-bean name="AccountGruppeForm" 
 
type="de.lohndirekt.ikarus.web.formbeans.billing.AccountGruppeForm" />
  </form-beans>


  <!-- ========== Global Forward Definitions ==============================
-->
  <global-forwards>
            <forward name = "error" path = "/global/error.jsp" />
  </global-forwards>
  <!-- ========== Action Mapping Definitions ==============================
-->
  <action-mappings>
    <!-- ========== FibuAccountGruppeEditieren
============================== -->
    <action path="/billing/FibuAccountGruppeSuchAction" 
 
type="de.lohndirekt.ikarus.web.actions.billing.FibuAccountGruppeSuchAction"
            name="AccountGruppeForm" 
            scope="request" 
            validate="false" >

            <forward name="failure" path="/AccountGruppeSuchFormular.jsp" />
            <forward name="success" path="/FibuAccountGruppeAnsicht.jsp" />
    </action>
    
    <action path="/billing/FibuAccountGruppeUpdateAction" 
 
type="de.lohndirekt.ikarus.web.actions.billing.FibuAccountGruppeUpdateAction
"
            name="AccountGruppeForm" 
            scope="request" 
            validate="true" >

            <forward name="failure" path="/FibuAccountGruppeAnsicht.jsp" />
            <forward name="success" path="/FibuAccountGruppeAnsicht.jsp" />
    </action>

  </action-mappings>
</struts-config>

My Problem:
the first Action ("/billing/FibuAccountGruppeSuchAction") works, but when i
send a request to <html:form
action="/billing/FibuAccountGruppeUpdateAction"> I get the following:

javax.servlet.ServletException: BeanUtils.populate 
	at
org.apache.struts.util.RequestUtils.populate(RequestUtils.java:954) 
	at
org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.j
ava:795) 
	at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:244)

	at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1109) 
	at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:470) ...

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.j
ava:1574) 
	at
org.apache.commons.beanutils.PropertyUtils.setNestedProperty(PropertyUtils.j
ava:1468) 
	at
org.apache.commons.beanutils.PropertyUtils.setProperty(PropertyUtils.java:14
98) 
	at
org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:613) 
	at
org.apache.struts.util.RequestUtils.populate(RequestUtils.java:952) 
	at
org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.j
ava:795) 
	at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:244)

	at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1109) 
	at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:470) ... 


First I open a formular to search for an AccountGruppe by an Id:
	without formats AccountGruppeSuchFormular.jsp looks like this:

        <html:form action="billing/FibuAccountGruppeSuchAction">
            <html:text property="accountGruppe.id"/>
            <html:submit/>    
        </html:form>

the ActionServlet fetches the Data of the AccountGruppe from the EJBServer.
The presentation of the Data is in /FibuAccountGruppeAnsicht.jsp:

         <html:form action="billing/FibuAccountGruppeUpdateAction">
              <html:text property="accountGruppe.name"/>
              <html:text property="accountGruppe.notiz"/>
              <html:text property="accountGruppe.guthaben"/>
              <html:text property="accountGruppe.datum"/>
              <html:text property="accountGruppe.mwStInProzent"/>
              <html:text property="accountGruppe.rabattInProzent"/>
              <html:submit/>    
        </html:form>

this works all fine, the error apears when i press the submit button.

I have no Idea where the error could be.
thanks for helping,
Sven

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