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Bug 94236

Summary:	NPE in XSD editor design view
Product:	xml	Reporter:	J Xu <junxu>
Component:	Schema Tools	Assignee:	Girish Balachandran <girixkumar>
Status:	VERIFIED FIXED
Severity:	blocker
Priority:	P3
Version:	5.x
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:

Description J Xu 2007-02-03 02:09:56 UTC

Got NPE in XSD editor design view.  Steps to reproduce:
1. Create a new XSD
2. Add an element declaration in schema view
3. Go to design view
4. Expand the element declaration (no child components for now)
5. Drag and drop a new element declaration as the child of the existing 
element declaration
6. Drag a new element declaration as the sibling of the one just added and 
drop to the beginning of the model group.
7. Save the XSD
8. Close the XSD editor window
9. Double click the XSD to open it in XSD editor again
10. Go to design view
11. Expand the global element declaration (it should have two child element 
declarations)
12. Drag a new element declaration and drop it to the beginning of the model 
group of the global element declaration.  NPE occurs at this time.

Video is also attached.

Stack trace:

java.lang.NullPointerException
   at 
org.netbeans.modules.xml.schema.abe.ElementsContainerPanel$1._propertyChange
(ElementsContainerPanel.java:62)
   at org.netbeans.modules.xml.schema.abe.ModelEventMediator.propertyChange
(ModelEventMediator.java:55)
   at 
org.netbeans.modules.xml.xam.AbstractComponent$DelegateListener.propertyChange
(AbstractComponent.java:401)
   at java.beans.PropertyChangeSupport.firePropertyChange
(PropertyChangeSupport.java:333)
   at 
org.netbeans.modules.xml.xam.AbstractModel$Transaction.fireCompleteEventSet
(AbstractModel.java:401)
   at org.netbeans.modules.xml.xam.AbstractModel$Transaction.fireEvents
(AbstractModel.java:389)
   at org.netbeans.modules.xml.xam.AbstractModel.endTransaction
(AbstractModel.java:292)
   at org.netbeans.modules.xml.xam.AbstractModel.endTransaction
(AbstractModel.java:284)
   at 
org.netbeans.modules.xml.schema.abe.ElementsContainerPanel.addNewElementAt
(ElementsContainerPanel.java:195)
   at org.netbeans.modules.xml.schema.abe.ElementsContainerPanel.tweenerDrop
(ElementsContainerPanel.java:208)
   at org.netbeans.modules.xml.schema.abe.CompositorPanel.tweenerDrop
(CompositorPanel.java:537)
   at org.netbeans.modules.xml.schema.abe.ContainerPanel$2.drop
(ContainerPanel.java:429)
   at org.netbeans.modules.xml.schema.abe.TweenerPanel.drop
(TweenerPanel.java:223)
   at org.netbeans.modules.xml.schema.abe.ABEBaseDropPanel$2.drop
(ABEBaseDropPanel.java:109)
   at java.awt.dnd.DropTarget.drop(DropTarget.java:430)
   at sun.awt.dnd.SunDropTargetContextPeer.processDropMessage
(SunDropTargetContextPeer.java:500)
   at sun.awt.dnd.SunDropTargetContextPeer.access$800
(SunDropTargetContextPeer.java:53)
   at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchDropEvent
(SunDropTargetContextPeer.java:812)
   at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent
(SunDropTargetContextPeer.java:736)
   at sun.awt.dnd.SunDropTargetEvent.dispatch(SunDropTargetEvent.java:29)
   at java.awt.Component.dispatchEventImpl(Component.java:3826)
   at java.awt.Container.dispatchEventImpl(Container.java:2024)
   at java.awt.Component.dispatchEvent(Component.java:3803)
   at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
   at java.awt.LightweightDispatcher.processDropTargetEvent
(Container.java:3963)
   at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3817)
   at java.awt.Container.dispatchEventImpl(Container.java:2010)
   at java.awt.Window.dispatchEventImpl(Window.java:1778)
   at java.awt.Component.dispatchEvent(Component.java:3803)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
[catch] at java.awt.EventDispatchThread.pumpOneEventForHierarchy
(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy
(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

Comment 1 Girish Balachandran 2007-02-06 03:43:14 UTC

I have fixed this bug partially. The below mentioned problem may not occur
anymore. But the fix might not take care of the memory leaks. So, I am leaving
this bug open to investigate further.
You can verify this bug in the current builds.

Comment 2 Samaresh Panda 2007-03-05 05:25:24 UTC

"XML Schema Core"
SchemaABEViewMultiViewElement.java
new revision: 1.1.2.47.6.6; previous revision: 1.1.2.47.6.5
"XML Schema Design"
ABEBaseDropPanel.java
new revision: 1.1.2.11.6.3; previous revision: 1.1.2.11.6.2
InstanceDesignerPanel.java
new revision: 1.1.2.43.6.4; previous revision: 1.1.2.43.6.3
InstanceUIContext.java
new revision: 1.1.2.18.6.4; previous revision: 1.1.2.18.6.3
ABEAbstractNode.java
new revision: 1.1.2.54.6.5; previous revision: 1.1.2.54.6.4

Comment 3 tonybeckham 2007-03-07 23:48:15 UTC

Verified fixed in build 070307_11