java.lang.NullPointerException

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    • java.lang.NullPointerException at org.eclipse.persistence.internal.jpa.metadata.ORMetadata.shouldOverride(ORMetadata.java:882) at org.eclipse.persistence.internal.jpa.metadata.ORMetadata.mergeORObjectLists(ORMetadata.java:645) at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.XMLAttributes.merge(XMLAttributes.java:390) at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.merge(ClassAccessor.java:1201) at org.eclipse.persistence.internal.jpa.metadata.xml.DBEntityMappings.initPersistenceUnitClasses(DBEntityMappings.java:133) at org.netbeans.db.modeler.persistence.internal.jpa.metadata.JPAMMetadataProcessor.initPersistenceUnitClasses(JPAMMetadataProcessor.java:56) at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processEntityMappings(MetadataProcessor.java:556) at org.netbeans.db.modeler.persistence.internal.jpa.deployment.JPAMPersistenceUnitProcessor.processORMetadata(JPAMPersistenceUnitProcessor.java:45) at org.netbeans.db.modeler.specification.model.util.DBModelerUtil.createDBMapping(DBModelerUtil.java:252) at org.netbeans.db.modeler.specification.model.util.DBModelerUtil.loadModelerFileInternal(DBModelerUtil.java:190) at org.netbeans.db.modeler.specification.model.util.DBModelerUtil.loadModelerFile(DBModelerUtil.java:178) at org.netbeans.modeler.core.NBModelerUtil.loadModelerFile(NBModelerUtil.java:57) at org.netbeans.modeler.specification.model.file.action.ModelerFileActionListener.openModelerFile(ModelerFileActionListener.java:150) at org.netbeans.db.modeler.specification.model.file.action.DBViewerActionListener.init(DBViewerActionListener.java:59) at org.netbeans.jpa.modeler.specification.model.util.JPAModelerUtil.openDBViewer(JPAModelerUtil.java:1767) at org.netbeans.jpa.modeler.specification.model.scene.JPAModelerScene.lambda$getPopupMenuItemList$4(JPAModelerScene.java:384) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) at javax.swing.AbstractButton$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 javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877) at java.awt.Component.processMouseEvent(Component.java:6533) at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) at java.awt.Component.processEvent(Component.java:6298) at java.awt.Container.processEvent(Container.java:2236) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2294) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466) at java.awt.Container.dispatchEventImpl(Container.java:2280) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) 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 org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159) 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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