[CAY-1196] CayenneRuntimeException in modeler due to ClassNotFoundException when java type is invalid and db attribute is null.

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0M5
• Fix Version/s: 3.0M6
• Component/s: Modeler
• Environment: Ubuntu Linux
• Assignee: Robert Zeigler
• Reporter: Michael Shea
• Created: 16/Mar/09 18:03
• Updated: 17/Mar/09 06:17
• Resolved: 17/Mar/09 06:17

Description

To duplicate:

1. Open an existing project with the Cayenne Modeler.
2. Select an existing attribute on an existing object entity. Delete the Java Type field.
3. Navigate to some other object entity.
4. Go back to the original one and click the "attributes" tab. You will see that the GUI doesn't get updated when you switch to that tab.

It looks like the modeler is calling Class.forName( "" ).
I have managed to work around this by manually editing the map.xml file and filling in a valid java classname for the attribute in question.

The following stacktrace is printed to the console:

Exception in thread "AWT-EventQueue-0" org.apache.cayenne.CayenneRuntimeException: [v.3.0M5 Dec 09 2008 00:19:19] Failed to load class for name '':
at org.apache.cayenne.map.ObjAttribute.getJavaClass(ObjAttribute.java:79)
at org.apache.cayenne.modeler.editor.ObjAttributeTableModel.getValueAt(ObjAttributeTableModel.java:174)
at javax.swing.JTable.getValueAt(JTable.java:2695)
at javax.swing.JTable.prepareRenderer(JTable.java:5712)
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2075)
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1977)
at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1773)
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143)
at javax.swing.JComponent.paintComponent(JComponent.java:763)
at javax.swing.JComponent.paint(JComponent.java:1027)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paint(JComponent.java:1036)
at javax.swing.JViewport.paint(JViewport.java:747)
at javax.swing.JComponent.paintChildren(JComponent.java:864)
at javax.swing.JComponent.paint(JComponent.java:1036)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5122)
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:277)
at javax.swing.RepaintManager.paint(RepaintManager.java:1217)
at javax.swing.JComponent._paintImmediately(JComponent.java:5070)
at javax.swing.JComponent.paintImmediately(JComponent.java:4880)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:803)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:714)
at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:694)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.ClassNotFoundException:
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.apache.cayenne.util.Util.getJavaClass(Util.java:588)
at org.apache.cayenne.map.ObjAttribute.getJavaClass(ObjAttribute.java:76)
... 31 more