Problem: View Object with Multiple Updateable Dependent Entity Objects

I try to implement a ViewObject with 2 updateable entities based on the document:
http://www.oracle.com/technology/products/jdev/howtos/bc4j/multientityvo.html
But I get an early NullPointerException:
As written in the document I overriden the create method in the ViewObjectRowImpl class:
protected void create(AttributeList attributeList) {
// The BC4J framework will already have created "blank" entity instances
System.out.println(getClass().getName()+"create BEGIN");
LabEventTypeItemImpl newLabEventTypeItem = this.getLabEventTypeItem();
System.out.println(getClass().getName()+"create 1");
TariffItemImpl newTariffItem = this.getTariffItem();
System.out.println(getClass().getName()+"create 2");
try {
// Let department "blank" entity instance to do programmatic defaulting
newLabEventTypeItem.create(attributeList);
System.out.println(getClass().getName()+"create 3");
// Let employee "blank" entity instance to do programmatic defaulting
// passing in new DepartmentImpl instance so its attributes are
if (newTariffItem == null) // added trace
System.out.println(getClass().getName()+"create newTariffItem IS NULLLLL");
// available to the EmployeeImpl's create method.
newTariffItem.create(newLabEventTypeItem);
System.out.println(getClass().getName()+"create 4");
catch (JboException ex) {
if (newLabEventTypeItem != null)
newLabEventTypeItem.revert();
if (newTariffItem != null)
newTariffItem.revert();
throw ex;
catch (Exception otherEx) {
if (newLabEventTypeItem != null)
newLabEventTypeItem.revert();
if (newTariffItem != null)
newTariffItem.revert();
throw new RowCreateException(true /* EO Row? */,
"LabEventTypeItem" /* EO Name */,
otherEx /* Details */);
System.out.println(getClass().getName()+"create END");
The code:
TariffItemImpl newTariffItem = this.getTariffItem();
is equivalent in the example to:
EmployeeImpl newEmployee = getEmployee();
In my case this.getTariffItem() <=> getEmployee() returns null?
I get an Exception when I call:
newTariffItem.create(newLabEventTypeItem);
Equivalent to:
newEmployee.create(newDepartment);
ViewObject partial XML:
======================
<DesignTime>
<Attr Name="_isCodegen" Value="true" />
<Attr Name="_version" Value="10.1.2.17.96" />
<Attr Name="_codeGenFlag2" Value="Access|Coll|Msg" />
<Attr Name="_isExpertMode" Value="false" />
</DesignTime>
<EntityUsage
Name="LabEventTypeItem"
Entity="com.photoswing.model.lab.LabEventTypeItem" >
<DesignTime>
<Attr Name="_EntireObjectTable" Value="false" />
<Attr Name="_queryClause" Value="true" />
<Attr Name="_queryWhere" Value="(((LabEventTypeItem.LAB_EVENT_TYPE_ITEM_ID = TariffItem.LAB_EVENT_TYPE_ITEM_ID)AND (LabEventTypeItem.ITEM_ID = Item.ITEM_ID))AND (LabEventTypeItem.PRINT_SIZE_DPI_ID = PrintSizeDpi.PRINT_SIZE_DPI_ID(+)))AND (LabEventTypeItem.FILM_PRINT_SIZE_DPI_ID = FilmPrintSizeDpi.FILM_PRINT_SIZE_DPI_ID(+))" />
<Attr Name="_queryOrderBy" Value="Item.ITEM_TYPE_ID,PrintSizeDpi.REQ_MEGA_PIXELS,Item.ITEM_ID" />
</DesignTime>
</EntityUsage>
<EntityUsage
Name="TariffItem"
Entity="com.photoswing.model.lab.TariffItem"
Association="com.photoswing.model.lab.TariffItemLabEventTypeItemFkAssoc"
AssociationEnd="com.photoswing.model.lab.TariffItemLabEventTypeItemFkAssoc.TariffItemLabEventTypeItem"
SourceUsage="com.photoswing.model.lab.LabEventTypeItemAndTariffItemVO.LabEventTypeItem"
Reference="true" >
<DesignTime>
<Attr Name="_EntireObjectTable" Value="false" />
<Attr Name="_queryClause" Value="false" />
<AttrArray Name="_srcAttributes">
<Item Value="com.photoswing.model.lab.LabEventTypeItem.LabEventTypeItemId" />
</AttrArray>
<AttrArray Name="_dstAttributes">
<Item Value="com.photoswing.model.lab.TariffItem.LabEventTypeItemId" />
</AttrArray>
</DesignTime>
</EntityUsage>
Stack trace:
===========
oracle.jbo.RowCreateException: JBO-25017: Error while creating a new entity row for LabEventTypeItem.
     at com.photoswing.model.lab.LabEventTypeItemAndTariffItemVORowImpl.create(LabEventTypeItemAndTariffItemVORowImpl.java:1370)
     at oracle.jbo.server.ViewRowImpl.callCreate(ViewRowImpl.java:353)
     at oracle.jbo.server.ViewObjectImpl.createInstance(ViewObjectImpl.java:2599)
     at oracle.jbo.server.QueryCollection.createRowWithEntities(QueryCollection.java:1048)
     at oracle.jbo.server.ViewRowSetImpl.createRowWithEntities(ViewRowSetImpl.java:1725)
     at oracle.jbo.server.ViewRowSetImpl.doCreateAndInitRow(ViewRowSetImpl.java:1769)
     at oracle.jbo.server.ViewRowSetImpl.createRow(ViewRowSetImpl.java:1749)
     at oracle.jbo.server.ViewObjectImpl.createRow(ViewObjectImpl.java:6230)
     at oracle.jbo.uicli.binding.JUCtrlActionBinding.doIt(JUCtrlActionBinding.java:891)
     at oracle.jbo.uicli.jui.JUActionBinding.doIt(JUActionBinding.java:203)
     at oracle.jbo.uicli.binding.JUCtrlActionBinding.invoke(JUCtrlActionBinding.java:478)
     at oracle.jbo.uicli.controls.JUNavigationBar.doAction(JUNavigationBar.java:306)
     at com.photoswing.component.JUNavBar.doAction(JUNavBar.java:1114)
     at oracle.jbo.uicli.controls.JUNavigationBar.actionPerformed(JUNavigationBar.java:259)
     at com.photoswing.component.JUNavBar.actionPerformed(JUNavBar.java:419)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
     at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
     at java.awt.Component.processMouseEvent(Component.java:5100)
     at java.awt.Component.processEvent(Component.java:4897)
     at java.awt.Container.processEvent(Container.java:1569)
     at java.awt.Component.dispatchEventImpl(Component.java:3615)
     at java.awt.Container.dispatchEventImpl(Container.java:1627)
     at java.awt.Component.dispatchEvent(Component.java)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
     at java.awt.Container.dispatchEventImpl(Container.java:1613)
     at java.awt.Window.dispatchEventImpl(Window.java)
     at java.awt.Component.dispatchEvent(Component.java)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:458)
     at com.photoswing.view.start.WaitCursorEventQueue.dispatchEvent(PhotoWebshopDesktop.java:3077)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
## Detail 0 ##
java.lang.NullPointerException
     at com.photoswing.model.lab.LabEventTypeItemAndTariffItemVORowImpl.create(LabEventTypeItemAndTariffItemVORowImpl.java:1355)
     at oracle.jbo.server.ViewRowImpl.callCreate(ViewRowImpl.java:353)
     at oracle.jbo.server.ViewObjectImpl.createInstance(ViewObjectImpl.java:2599)
     at oracle.jbo.server.QueryCollection.createRowWithEntities(QueryCollection.java:1048)
     at oracle.jbo.server.ViewRowSetImpl.createRowWithEntities(ViewRowSetImpl.java:1725)
     at oracle.jbo.server.ViewRowSetImpl.doCreateAndInitRow(ViewRowSetImpl.java:1769)
     at oracle.jbo.server.ViewRowSetImpl.createRow(ViewRowSetImpl.java:1749)
     at oracle.jbo.server.ViewObjectImpl.createRow(ViewObjectImpl.java:6230)
     at oracle.jbo.uicli.binding.JUCtrlActionBinding.doIt(JUCtrlActionBinding.java:891)
     at oracle.jbo.uicli.jui.JUActionBinding.doIt(JUActionBinding.java:203)
     at oracle.jbo.uicli.binding.JUCtrlActionBinding.invoke(JUCtrlActionBinding.java:478)
     at oracle.jbo.uicli.controls.JUNavigationBar.doAction(JUNavigationBar.java:306)
     at com.photoswing.component.JUNavBar.doAction(JUNavBar.java:1114)
     at oracle.jbo.uicli.controls.JUNavigationBar.actionPerformed(JUNavigationBar.java:259)
     at com.photoswing.component.JUNavBar.actionPerformed(JUNavBar.java:419)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
     at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
     at java.awt.Component.processMouseEvent(Component.java:5100)
     at java.awt.Component.processEvent(Component.java:4897)
     at java.awt.Container.processEvent(Container.java:1569)
     at java.awt.Component.dispatchEventImpl(Component.java:3615)
     at java.awt.Container.dispatchEventImpl(Container.java:1627)
     at java.awt.Component.dispatchEvent(Component.java)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
     at java.awt.Container.dispatchEventImpl(Container.java:1613)
     at java.awt.Window.dispatchEventImpl(Window.java)
     at java.awt.Component.dispatchEvent(Component.java)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:458)
     at com.photoswing.view.start.WaitCursorEventQueue.dispatchEvent(PhotoWebshopDesktop.java:3077)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
Thanks
Frederic

I get the same error on the scott schema:
protected void create(AttributeList attributeList) {
// The BC4J framework will already have created "blank" entity instances
DeptImpl newDept = getDept();
EmpImpl newEmp = getEmp();
try {
// Let dept "blank" entity instance to do programmatic defaulting
newDept.create(attributeList);
// Let emp "blank" entity instance to do programmatic defaulting
// passing in new DeptImpl instance so its attributes are
// available to the EmpImpl's create method.
if (newEmp == null)
System.out.println(getClass().getName()+".create newEmp IS NULL");
newEmp.create(newDept);
catch (JboException ex) {
newDept.revert();
newEmp.revert();
throw ex;
catch (Exception otherEx) {
newDept.revert();
newEmp.revert();
throw new RowCreateException(true /* EO Row? */,
"Dept" /* EO Name */,
otherEx /* Details */);
The trace shows:
model.CreateDepartmentAndFirstEmployeeRowImpl.create newEmp IS NULL
Another problem:
Refreshing Foreign Key Values in New Employees Once Final Department Id is Assigned:
Number newDeptno = getDeptno().getSequenceNumber();
doesn't compile getSequenceNumber() unknown.
I send you a usecase as a zip file.
The code for Refreshing Foreign Key in is comment at the end of the DeptImpl file.
Regards
Frederic
I send you the

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1. how do materialized view logs manage multiple dependent materialized views?
2. How do I tell by looking at the materialized view log which rows have not been fast refresh for a specific materialized view?

As a starter for 10 try reading: Materialized View Refresh : Log Population and Purge (Doc ID 236233.1) on MOS.
Thanks
Paul

Problem: View Object with Multiple Updateable Dependent Entity Objects

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