Yes thats true..
but may be i am wrong i am assuming that i am trying to set my PO classes in
the USer class
and for this user class i am using MOdel Driven Approach in my action
class..
if i am doing wrong here can any body point me where's the error in the
approach
On Tue, Nov 11, 2008 at 5:54 PM, Nils-Helge Garli Hegvik
<[EMAIL PROTECTED]>wrote:
> I'm guessing your POs in User are null. Line 15 in TestAction should
> tell you what.
>
> Nils-H
>
> On Tue, Nov 11, 2008 at 12:52 PM, aum strut <[EMAIL PROTECTED]> wrote:
> > Hi all,
> >
> > I am using Model Driven approach for transfering my form data to the bean
> > object.i have a form(JSP Page) where i have divided the form in three
> > sections.
> > and based on the name of these sections i have created 3 Bean classes(PO)
> > for storing the data.Additonally i have created one more PO class for
> > setting values in these three PO classes.below is the code for this
> class.
> >
> > *
> >
> > package* demo;
> >
> > *
> >
> > public* *class* User {
> >
> > *private* AddressPO addressPO;
> >
> > *private* BusinessInformationPO businessInformationPO;
> >
> > *private* UserCredentialPO userCredentialPO;
> >
> > /**
> >
> > * [EMAIL PROTECTED] the addressPO
> >
> > */
> >
> > *public* AddressPO getAddressPO() {
> >
> > *return* addressPO;
> >
> > }
> >
> > /**
> >
> > * [EMAIL PROTECTED] addressPO the addressPO to set
> >
> > */
> >
> > *public* *void* setAddressPO(AddressPO addressPO) {
> >
> > *this*.addressPO = addressPO;
> >
> > }
> >
> > /**
> >
> > * [EMAIL PROTECTED] the businessInformationPO
> >
> > */
> >
> > *public* BusinessInformationPO getBusinessInformationPO() {
> >
> > *return* businessInformationPO;
> >
> > }
> >
> > /**
> >
> > * [EMAIL PROTECTED] businessInformationPO the businessInformationPO to set
> >
> > */
> >
> > *public* *void* setBusinessInformationPO(BusinessInformationPO
> > businessInformationPO) {
> >
> > *this*.businessInformationPO = businessInformationPO;
> >
> > }
> >
> > /**
> >
> > * [EMAIL PROTECTED] the userCredentialPO
> >
> > */
> >
> > *public* UserCredentialPO getUserCredentialPO() {
> >
> > *return* userCredentialPO;
> >
> > }
> >
> > /**
> >
> > * [EMAIL PROTECTED] userCredentialPO the userCredentialPO to set
> >
> > */
> >
> > *public* *void* setUserCredentialPO(UserCredentialPO userCredentialPO) {
> >
> > *this*.userCredentialPO = userCredentialPO;
> >
> > }
> >
> > }
> >
> >
> >
> > MY action class is looking like this
> > *
> >
> > public* *class* TestAction *extends* ActionSupport
> > *implements*ModelDriven<User> {
> >
> > /**
> >
> > *
> >
> > */
> >
> > *private* *static* *final* *long* *serialVersionUID* =
> 4184580362763509728L;
> >
> > *public* String execute() *throws* Exception{
> >
> > System.*out*.println("inside action");
> >
> > System.*out*.println(user.getAddressPO().getFirstName());
> >
> > System.*out*.println(user.getBusinessInformationPO().getTinNumber());
> >
> > System.*out*.println(user.getUserCredentialPO().getEmail());
> >
> > *return* *SUCCESS*;
> >
> > }
> >
> > *private* User user=*new* User();
> >
> >
> >
> > *public* User getModel() {
> >
> > *return* user;
> >
> > }
> >
> > }
> >
> >
> >
> > but it is giving me the following exception
> >
> > inside action
> >
> > Nov 11, 2008 5:20:11 PM org.apache.catalina.core.StandardWrapperValve
> invoke
> >
> > SEVERE: Servlet.service() for servlet default threw exception
> > *
> >
> > java.lang.NullPointerException
> > *
> >
> > at com.test.demo.TestAction.execute(*TestAction.java:15*)
> >
> > 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:597*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(*
> > DefaultActionInvocation.java:404*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(*
> > DefaultActionInvocation.java:267*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:229*)
> >
> > at
> >
> com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(*
> > DefaultWorkflowInterceptor.java:221*)
> >
> > at
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(*
> > MethodFilterInterceptor.java:86*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(*
> > ValidationInterceptor.java:150*)
> >
> > at
> >
> org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(
> > *AnnotationValidationInterceptor.java:48*)
> >
> > at
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(*
> > MethodFilterInterceptor.java:86*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at
> com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(
> > *ConversionErrorInterceptor.java:123*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at
> com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(*
> > ParametersInterceptor.java:167*)
> >
> > at
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(*
> > MethodFilterInterceptor.java:86*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at
> >
> com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(*
> > StaticParametersInterceptor.java:105*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(*
> > CheckboxInterceptor.java:83*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(*
> > FileUploadInterceptor.java:207*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(*
> > ModelDrivenInterceptor.java:74*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at
> >
> com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(*
> > ScopedModelDrivenInterceptor.java:127*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at
> org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(*
> > ProfilingActivationInterceptor.java:107*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at
> org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(*
> > DebuggingInterceptor.java:206*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(*
> > ChainingInterceptor.java:115*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(*
> > I18nInterceptor.java:143*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(*
> > PrepareInterceptor.java:121*)
> >
> > at
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(*
> > MethodFilterInterceptor.java:86*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(*
> > ServletConfigInterceptor.java:170*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(*
> > AliasInterceptor.java:123*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at
> >
> com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(*
> > ExceptionMappingInterceptor.java:176*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:224*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(*
> > DefaultActionInvocation.java:223*)
> >
> > at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(*
> > UtilTimerStack.java:455*)
> >
> > at com.opensymphony.xwork2.DefaultActionInvocation.invoke(*
> > DefaultActionInvocation.java:221*)
> >
> > at org.apache.struts2.impl.StrutsActionProxy.execute(*
> > StrutsActionProxy.java:50*)
> >
> > at org.apache.struts2.dispatcher.Dispatcher.serviceAction(*
> > Dispatcher.java:504*)
> >
> > at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(*
> > FilterDispatcher.java:419*)
> >
> > at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(*
> > ApplicationFilterChain.java:215*)
> >
> > at org.apache.catalina.core.ApplicationFilterChain.doFilter(*
> > ApplicationFilterChain.java:188*)
> >
> > at org.apache.catalina.core.StandardWrapperValve.invoke(*
> > StandardWrapperValve.java:213*)
> >
> > at org.apache.catalina.core.StandardContextValve.invoke(*
> > StandardContextValve.java:174*)
> >
> > at org.apache.catalina.core.StandardHostValve.invoke(*
> > StandardHostValve.java:127*)
> >
> > at org.apache.catalina.valves.ErrorReportValve.invoke(*
> > ErrorReportValve.java:117*)
> >
> > at org.apache.catalina.core.StandardEngineValve.invoke(*
> > StandardEngineValve.java:108*)
> >
> > at org.apache.catalina.connector.CoyoteAdapter.service(*
> > CoyoteAdapter.java:174*)
> >
> > at org.apache.coyote.http11.Http11Processor.process(*
> > Http11Processor.java:874*)
> >
> > at
> >
> org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(
> > *Http11BaseProtocol.java:665*)
> >
> > at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(*
> > PoolTcpEndpoint.java:528*)
> >
> > at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(*
> > LeaderFollowerWorkerThread.java:81*)
> >
> > at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(*
> > ThreadPool.java:689*)
> >
> > at java.lang.Thread.run(*Thread.java:619*)
> >
> >
> >
> > Can any body guide me to the cause of error?
> >
> >
> >
> > thanks in advaice
> >
> > aum
> >
>
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>
