Error : com.iplanet.jato.model.ModelControlException: Location is beyond th

Question

Hi..All,
I have a Page displayed with few values & one of them is of HREF type.The Model gets populated & I am able to view the data. When I click on the HREF value, I get an error :com.iplanet.jato.model.ModelControlException: Location is beyond the end of the current bean array (0 > -1)I tried setting the Bean Scope to "Any", "Request" , but it still gives me this error. The sys out in the constructor shows 0 for the size when the request comes in for the second time.
Here is the JSP :
package accruals.main;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.iplanet.jato.*;
import com.iplanet.jato.command.*;
import com.iplanet.jato.model.*;
import com.iplanet.jato.view.*;
import com.iplanet.jato.view.event.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;
import AccrualsEJB.*;
public class TaxPackUserAccessView extends BasicTiledView {
* Default constructor
public TaxPackUserAccessView(View parent, String name) {
super(parent,name);
// setMaxDisplayTiles(5);
System.out.println("The Model Name in the init before is : " +getPrimaryModel().getName());
try {
System.out.println("The model size in the init is : " + getPrimaryModel().getSize());
} catch (Exception e) {System.out.println("Error in init " + e);}
// Non-visual component initialization
private com.iplanet.jato.model.SimpleModelReference taxPackUserAccess;
* Creates the non-visual components
* <p><em>WARNING:</em> This code was automatically generated, do not edit!
private void initComponents(){
taxPackUserAccess = new com.iplanet.jato.model.SimpleModelReference();
{ // begin local variable scope
taxPackUserAccess.setModelClassName("accruals.main.TaxPackUserAccess");
} // end local variable scope
// Instance initializer - non-visual components
initComponents();
// Instance initializer - set properties
this.setPrimaryModelReference(taxPackUserAccess);
com.iplanet.jato.model.ModelReference[] autoRetrievingModelsVar =
new com.iplanet.jato.model.ModelReference[0];
this.setAutoRetrievingModels(autoRetrievingModelsVar);
this.setMaxDisplayTiles(100);
* Registers each child in this container.
* <p><em>WARNING:</em> This code was automatically generated, do not edit!
private void registerChildren() {
registerChild(CHILD_EMP_NO, com.iplanet.jato.view.BasicDisplayField.class);
registerChild(CHILD_NAME, com.iplanet.jato.view.BasicDisplayField.class);
registerChild(CHILD_ADMIN, com.iplanet.jato.view.BasicDisplayField.class);
registerChild(CHILD_SUPER_USER, com.iplanet.jato.view.BasicDisplayField.class);
registerChild(CHILD_EMP_NO_SUMMARY, com.iplanet.jato.view.BasicCommandField.class);
// Instance initializer - register children
registerChildren();
* Creates the named child.
* <p><em>WARNING:</em> This code was automatically generated, do not edit!
protected View createChildReserved(String name) {
if (name.equals(CHILD_EMP_NO)) {
com.iplanet.jato.view.BasicDisplayField child =
new com.iplanet.jato.view.BasicDisplayField(this, CHILD_EMP_NO);
child.setModelReference(taxPackUserAccess);
com.iplanet.jato.model.ModelFieldBinding modelFieldBindingVar =
new com.iplanet.jato.model.ModelFieldBinding();
{ // begin local variable scope
modelFieldBindingVar.setReadFieldName("empNo");
modelFieldBindingVar.setWriteFieldName("empNo");
} // end local variable scope
child.setModelFieldBinding(modelFieldBindingVar);
child.setValue( "");
return child;
else if (name.equals(CHILD_NAME)) {
com.iplanet.jato.view.BasicDisplayField child =
new com.iplanet.jato.view.BasicDisplayField(this, CHILD_NAME);
child.setModelReference(taxPackUserAccess);
com.iplanet.jato.model.ModelFieldBinding modelFieldBindingVar =
new com.iplanet.jato.model.ModelFieldBinding();
{ // begin local variable scope
modelFieldBindingVar.setReadFieldName("name");
modelFieldBindingVar.setWriteFieldName("name");
} // end local variable scope
child.setModelFieldBinding(modelFieldBindingVar);
child.setValue( "");
return child;
else if (name.equals(CHILD_ADMIN)) {
com.iplanet.jato.view.BasicDisplayField child =
new com.iplanet.jato.view.BasicDisplayField(this, CHILD_ADMIN);
child.setModelReference(taxPackUserAccess);
com.iplanet.jato.model.ModelFieldBinding modelFieldBindingVar =
new com.iplanet.jato.model.ModelFieldBinding();
{ // begin local variable scope
modelFieldBindingVar.setReadFieldName("admin");
modelFieldBindingVar.setWriteFieldName("admin");
} // end local variable scope
child.setModelFieldBinding(modelFieldBindingVar);
child.setValue( "1");
return child;
else if (name.equals(CHILD_SUPER_USER)) {
com.iplanet.jato.view.BasicDisplayField child =
new com.iplanet.jato.view.BasicDisplayField(this, CHILD_SUPER_USER);
child.setModelReference(taxPackUserAccess);
com.iplanet.jato.model.ModelFieldBinding modelFieldBindingVar =
new com.iplanet.jato.model.ModelFieldBinding();
{ // begin local variable scope
modelFieldBindingVar.setReadFieldName("superUser");
modelFieldBindingVar.setWriteFieldName("superUser");
} // end local variable scope
child.setModelFieldBinding(modelFieldBindingVar);
child.setValue( "1");
return child;
else if (name.equals(CHILD_EMP_NO_SUMMARY)) {
com.iplanet.jato.view.BasicCommandField child =
new com.iplanet.jato.view.BasicCommandField(this, CHILD_EMP_NO_SUMMARY);
child.setModelReference(taxPackUserAccess);
com.iplanet.jato.model.ModelFieldBinding modelFieldBindingVar =
new com.iplanet.jato.model.ModelFieldBinding();
{ // begin local variable scope
modelFieldBindingVar.setReadFieldName("empNo");
modelFieldBindingVar.setWriteFieldName("empNo");
} // end local variable scope
child.setModelFieldBinding(modelFieldBindingVar);
return child;
return super.createChildReserved(name);
/** Returns the <code>empNo</code> child View component */
public com.iplanet.jato.view.BasicDisplayField getEmpNoChild() {
return (com.iplanet.jato.view.BasicDisplayField)getChild(CHILD_EMP_NO);
/** Returns the <code>name</code> child View component */
public com.iplanet.jato.view.BasicDisplayField getNameChild() {
return (com.iplanet.jato.view.BasicDisplayField)getChild(CHILD_NAME);
/** Returns the <code>admin</code> child View component */
public com.iplanet.jato.view.BasicDisplayField getAdminChild() {
return (com.iplanet.jato.view.BasicDisplayField)getChild(CHILD_ADMIN);
/** Returns the <code>superUser</code> child View component */
public com.iplanet.jato.view.BasicDisplayField getSuperUserChild() {
return (com.iplanet.jato.view.BasicDisplayField)getChild(CHILD_SUPER_USER);
/** Returns the <code>empNoSummary</code> child View component */
public com.iplanet.jato.view.BasicCommandField getEmpNoSummaryChild() {
return (com.iplanet.jato.view.BasicCommandField)getChild(CHILD_EMP_NO_SUMMARY);
public static final String CHILD_EMP_NO = "empNo";
public static final String CHILD_NAME = "name";
public static final String CHILD_ADMIN = "admin";
public static final String CHILD_SUPER_USER = "superUser";
public static final String CHILD_EMP_NO_SUMMARY = "empNoSummary";
public void handleEmpNoSummaryRequest(RequestInvocationEvent event) throws Exception {
System.out.println("The Model Name is : " +getPrimaryModel().getName());
setPrimaryModel((DatasetModel)getDefaultModel());
System.out.println("In Because of the link :" +((TiledViewRequestInvocationEvent)event).getTileNumber());
System.out.println("The Model Name is : + " +getPrimaryModel().getName());
System.out.println("The model size is from the request : " + getPrimaryModel().getSize());
getPrimaryModel().setLocation(((TiledViewRequestInvocationEvent)event).getTileNumber());
System.out.println("the value of the clicked field was :" + getDisplayFieldStringValue(CHILD_EMP_NO));
System.out.println("From the value:"+ getEmpNoChild().getValue());
getParentViewBean().forwardTo(getRequestContext());
public void beginComponentDisplay(DisplayEvent event) throws ModelControlException {
TaxPackUserDATA tpackDATA =null;
AccrualsSessionHome myAccrualsSessionHome;
String userID;
Object result;
try {
System.out.println("Before the create");
Context c = new InitialContext();
System.out.println("after the intial context");
result = c.lookup("ejb/AccrualsSession");
System.out.println("The class name :" +result.getClass().getName());
System.out.println("after the lookup");
myAccrualsSessionHome = (AccrualsSessionHome)PortableRemoteObject.narrow(result,AccrualsSessionHome.class);
System.out.println("after narrow down");
AccrualsSession asb = myAccrualsSessionHome.create();
System.out.println("after the create");
tpackDATA = asb.validateUser("111351");
System.out.println("The user is " + tpackDATA.getEmpNo());
System.out.println("The Name id is " + tpackDATA.getName());
System.out.println("The admin is " + tpackDATA.getAdmin());
System.out.println("The superUser is " + tpackDATA.getSuperUser());
} catch (Exception e) {
System.out.println("Error during Validate User Login in AccrualsLoginServlet" + e);
System.out.println("Inside AccrualsLoginViewBean beginComponentDisplay");
BeanAdapterModel model = (TaxPackUserAccess) getRequestContext().getModelManager().getModel(TaxPackUserAccess.class);
System.out.println("After creating the model" + getPrimaryModel().getName());
getRequestContext().getRequest().setAttribute(model.getBeanScopeAttributeName(), tpackDATA);
System.out.println("Leaving AccrualsLoginViewBean beginComponentDisplay");
System.out.println("The model size is : " + model.getSize());
// getPrimaryModel().setSize(1);
// resetTileIndex();
// super.beginComponentDisplay(event);
}

Answer 1

You are using BeanAdapterModel. Unless you've elected to place your BeanAdapterModel instance in the session, it is request-scoped like all JATO objects. This means that on the second request, a new model is created, and unless you set the list of beans on the model, it has no beans on which to set the incoming data.
An easy place to set the list of beans is in the constructor of the model. If, however, the beans are in one of the J2EE scopes (either already, or because you elected to put them there sometime earlier in your request handling), then you can use the model's ability to look up the beans in that scope by adjusting the Bean Scope and Bean Scope Attribute properties.