[Issue 6444] New - IllegalArgumentException with an empty tag name

http://argouml.tigris.org/issues/show_bug.cgi?id=6444
                 Issue #|6444
                 Summary|IllegalArgumentException with an empty tag name
               Component|argouml
                 Version|current
                Platform|All
                     URL|
              OS/Version|All
                  Status|NEW
       Status whiteboard|
                Keywords|
              Resolution|
              Issue type|DEFECT
                Priority|P3
            Subcomponent|Model/MDR
             Assigned to|tfmorris
             Reported by|baonn






------- Additional comments from [email protected] Thu Oct 18 20:38:47 -0700 2012 -------
The following steps will print an IllegalArgumentException in revision 19902

1. Start ArgoUML 
2. Creat a Class diagram 
3. Add a Class object 
4. Select the Class object to enable the Tagged Value tab
5. Leave the Tag column blank and add some text to the Value field

Exception trace 

java.lang.IllegalArgumentException:
at 
org.argouml.model.mdr.ExtensionMechanismsHelperMDRImpl.setType(ExtensionMechanis
msHelperMDRImpl.java:496)
	at 
org.argouml.uml.ui.TabTaggedValuesModel.addRow(TabTaggedValuesModel.java:318)
	at 
org.argouml.uml.ui.TabTaggedValuesModel.setValueAt(TabTaggedValuesModel.java:250
)
	at javax.swing.JTable.setValueAt(JTable.java:2744)
	at javax.swing.JTable.editingStopped(JTable.java:4726)
	at 
javax.swing.AbstractCellEditor.fireEditingStopped(AbstractCellEditor.java:141)
	at 
javax.swing.DefaultCellEditor$EditorDelegate.stopCellEditing(DefaultCellEditor.j
ava:368)
	at 
javax.swing.DefaultCellEditor.stopCellEditing(DefaultCellEditor.java:233)
	at javax.swing.JTable$GenericEditor.stopCellEditing(JTable.java:5481)
	at 
javax.swing.plaf.basic.BasicTableUI$Actions.actionPerformed(BasicTableUI.java:49
6)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1661)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2870)
	at javax.swing.JTable.processKeyBinding(JTable.java:5262)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2931)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2833)
	at java.awt.Component.processEvent(Component.java:6282)
	at java.awt.Container.processEvent(Container.java:2229)
	at java.awt.Component.dispatchEventImpl(Component.java:4861)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Component.dispatchEvent(Component.java:4687)
	at 
java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895)
	at 
java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManage
r.java:762)
	at 
java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusMan
ager.java:1027)
	at 
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusMan
ager.java:899)
	at 
java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.j
ava:727)
	at java.awt.Component.dispatchEventImpl(Component.java:4731)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Window.dispatchEventImpl(Window.java:2719)
	at java.awt.Component.dispatchEvent(Component.java:4687)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:682)
	at java.awt.EventQueue$3.run(EventQueue.java:680)
	at java.security.AccessController.doPrivileged(Native Method)
	at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:7
6)
	at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:8
7)
	at java.awt.EventQueue$4.run(EventQueue.java:696)
	at java.awt.EventQueue$4.run(EventQueue.java:694)
	at java.security.AccessController.doPrivileged(Native Method)
	at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:7
6)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
	at 
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244
)
	at 
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
	at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151
)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)

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