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Posted to commits@cayenne.apache.org by "Michael Shea (JIRA)" <ji...@apache.org> on 2009/03/16 19:04:17 UTC
[jira] Created: (CAY-1196) ClassNotFoundException in modeler
ClassNotFoundException in modeler
---------------------------------
Key: CAY-1196
URL: https://issues.apache.org/cayenne/browse/CAY-1196
Project: Cayenne
Issue Type: Bug
Components: CayenneModeler GUI
Affects Versions: 3.0M5
Environment: Ubuntu Linux
Reporter: Michael Shea
Priority: Minor
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
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[jira] Closed: (CAY-1196) CayenneRuntimeException in modeler due to
ClassNotFoundException when java type is invalid and db attribute is null.
Posted by "Robert Zeigler (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/cayenne/browse/CAY-1196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Zeigler closed CAY-1196.
-------------------------------
Resolution: Fixed
> CayenneRuntimeException in modeler due to ClassNotFoundException when java type is invalid and db attribute is null.
> --------------------------------------------------------------------------------------------------------------------
>
> Key: CAY-1196
> URL: https://issues.apache.org/cayenne/browse/CAY-1196
> Project: Cayenne
> Issue Type: Bug
> Components: CayenneModeler GUI
> Affects Versions: 3.0M5
> Environment: Ubuntu Linux
> Reporter: Michael Shea
> Assignee: Robert Zeigler
> Priority: Minor
> Fix For: 3.0M6
>
>
> 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
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[jira] Commented: (CAY-1196) ClassNotFoundException in modeler
Posted by "Robert Zeigler (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/cayenne/browse/CAY-1196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13284#action_13284 ]
Robert Zeigler commented on CAY-1196:
-------------------------------------
Duplicated on mac.
Key to duplication is to set the db attribute field to null, as well, which forces the modeler to guess the db type based on the java type.
Note that the gui updating on mac succeeds up to the failure; all attributes after teh failure will fail to render when the panel is fully refreshed (eg: after switching tabs).
> ClassNotFoundException in modeler
> ---------------------------------
>
> Key: CAY-1196
> URL: https://issues.apache.org/cayenne/browse/CAY-1196
> Project: Cayenne
> Issue Type: Bug
> Components: CayenneModeler GUI
> Affects Versions: 3.0M5
> Environment: Ubuntu Linux
> Reporter: Michael Shea
> Assignee: Robert Zeigler
> Priority: Minor
>
> 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
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[jira] Updated: (CAY-1196) CayenneRuntimeException in modeler due
to ClassNotFoundException when java type is invalid and db attribute is
null.
Posted by "Robert Zeigler (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/cayenne/browse/CAY-1196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Zeigler updated CAY-1196:
--------------------------------
Fix Version/s: 3.0M6
Summary: CayenneRuntimeException in modeler due to ClassNotFoundException when java type is invalid and db attribute is null. (was: ClassNotFoundException in modeler)
> CayenneRuntimeException in modeler due to ClassNotFoundException when java type is invalid and db attribute is null.
> --------------------------------------------------------------------------------------------------------------------
>
> Key: CAY-1196
> URL: https://issues.apache.org/cayenne/browse/CAY-1196
> Project: Cayenne
> Issue Type: Bug
> Components: CayenneModeler GUI
> Affects Versions: 3.0M5
> Environment: Ubuntu Linux
> Reporter: Michael Shea
> Assignee: Robert Zeigler
> Priority: Minor
> Fix For: 3.0M6
>
>
> 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
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[jira] Assigned: (CAY-1196) ClassNotFoundException in modeler
Posted by "Robert Zeigler (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/cayenne/browse/CAY-1196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Zeigler reassigned CAY-1196:
-----------------------------------
Assignee: Robert Zeigler
> ClassNotFoundException in modeler
> ---------------------------------
>
> Key: CAY-1196
> URL: https://issues.apache.org/cayenne/browse/CAY-1196
> Project: Cayenne
> Issue Type: Bug
> Components: CayenneModeler GUI
> Affects Versions: 3.0M5
> Environment: Ubuntu Linux
> Reporter: Michael Shea
> Assignee: Robert Zeigler
> Priority: Minor
>
> 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
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[jira] Commented: (CAY-1196) ClassNotFoundException in modeler
Posted by "Robert Zeigler (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/cayenne/browse/CAY-1196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13283#action_13283 ]
Robert Zeigler commented on CAY-1196:
-------------------------------------
Even using the 3.0M5 modeler, I can't duplicate this behavior.
Although... I'm trying on a mac.
I'll see if I can duplicate it on my ubuntu install.
> ClassNotFoundException in modeler
> ---------------------------------
>
> Key: CAY-1196
> URL: https://issues.apache.org/cayenne/browse/CAY-1196
> Project: Cayenne
> Issue Type: Bug
> Components: CayenneModeler GUI
> Affects Versions: 3.0M5
> Environment: Ubuntu Linux
> Reporter: Michael Shea
> Priority: Minor
>
> 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
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