NullPointerException when deleting nodes from the graph

[mbastian]

After importing a graph (codeminer.gexf), if you select all the nodes and try to delete them, the following Exception is thrown:

java.lang.NullPointerException
at org.gephi.graph.dhns.utils.avl.AbstractEdgeTree.remove(AbstractEdgeTree.java:239)
at org.gephi.graph.dhns.core.GraphStructure.removeFromDictionnary(GraphStructure.java:165)
at org.gephi.graph.dhns.core.StructureModifier$Business.deleteNode(StructureModifier.java:384)
at org.gephi.graph.dhns.core.StructureModifier$Business.access$400(StructureModifier.java:277)
at org.gephi.graph.dhns.core.StructureModifier.deleteNode(StructureModifier.java:103)
at org.gephi.graph.dhns.graph.HierarchicalGraphImpl.removeNode(HierarchicalGraphImpl.java:202)
at org.gephi.visualization.bridge.DHNSEventBridge.delete(DHNSEventBridge.java:380)
at org.gephi.visualization.apiimpl.GraphContextMenu$7.actionPerformed(GraphContextMenu.java:116)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1223)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1264)
at java.awt.Component.processMouseEvent(Component.java:6263)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Component.dispatchEvent(Component.java:4460)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)
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)

---

Imported from Launchpad using lp2gh.

• date created: 2010-07-19T09:40:03Z
• owner: pbittner
• the launchpad url was https://bugs.launchpad.net/bugs/607136

[mbastian]

(by pbittner)
An Exception that has the same origin (AbstractEdgeTree) is also thrown when you try to use a filter on that graph (codeminer.gexf):

java.lang.NullPointerException
at org.gephi.graph.dhns.utils.avl.AbstractEdgeTree.remove(AbstractEdgeTree.java:239)
at org.gephi.graph.dhns.core.GraphStructure.removeFromDictionnary(GraphStructure.java:165)
at org.gephi.graph.dhns.core.StructureModifier$Business.deleteNode(StructureModifier.java:384)
at org.gephi.graph.dhns.core.StructureModifier$Business.access$400(StructureModifier.java:277)
at org.gephi.graph.dhns.core.StructureModifier.deleteNode(StructureModifier.java:103)
at org.gephi.graph.dhns.graph.HierarchicalGraphImpl.removeNode(HierarchicalGraphImpl.java:202)
at org.gephi.filters.FilterProcessor.processNodeFilter(FilterProcessor.java:119)
at org.gephi.filters.FilterProcessor.process(FilterProcessor.java:84)
at org.gephi.filters.FilterThread.filter(FilterThread.java:128)
[catch] at org.gephi.filters.FilterThread.run(FilterThread.java:99)