Andrus Adamchik created CAY-2202:
------------------------------------

             Summary: NPE closing the project
                 Key: CAY-2202
                 URL: https://issues.apache.org/jira/browse/CAY-2202
             Project: Cayenne
          Issue Type: Bug
          Components: Modeler
    Affects Versions: 4.0.M4
            Reporter: Andrus Adamchik


I had a project open in CayenneModeler. After doing some work, I tried 
switching to another project from "Recent Projects". Got the error below. I 
dismissed the error, and tried closing the current project instead. Got the 
same error. I can no longer reproduce it (so this is likely related to the 
model state prior to closing the project). But perhaps we can guess an issue 
from the stack trace.

CayenneModeler Info
Version: 4.0.M4
Build Date: Dec 06 2016 14:38:16
Exception: 
=================================
java.lang.NullPointerException
    at 
org.apache.cayenne.modeler.util.state.DisplayEventType.parseToString(DisplayEventType.java:70)
    at 
org.apache.cayenne.modeler.util.state.AttributeDisplayEventType.saveLastDisplayEvent(AttributeDisplayEventType.java:87)
    at 
org.apache.cayenne.modeler.util.state.ProjectStateUtil.saveLastState(ProjectStateUtil.java:55)
    at 
org.apache.cayenne.modeler.CayenneModelerController.projectClosedAction(CayenneModelerController.java:209)
    at 
org.apache.cayenne.modeler.action.ProjectAction.closeProject(ProjectAction.java:75)
    at 
org.apache.cayenne.modeler.action.OpenProjectAction.performAction(OpenProjectAction.java:99)
    at 
org.apache.cayenne.modeler.util.CayenneAction.actionPerformed(CayenneAction.java:162)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at 
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
    at 
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
    at com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:125)
    at java.awt.MenuItem.processActionEvent(MenuItem.java:669)
    at java.awt.MenuItem.processEvent(MenuItem.java:628)
    at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:351)
    at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:339)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:761)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at 
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at 
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)




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