java.lang.NullPointerException on loadStyleForForm(Flattened

Classic Servoy
1

Hi guys,
I get a NullPointerException when loading a form. Please give me a hint on where to look to identify the problem. It seems to me that it tries to load a style that is not specified. I don’t have any errors/warnings in the “problems” tab, so every element has a correct style specified.

I’m running Servoy 5.2.7 on Windows, both server and client.

Here is the error:

ERROR - Debug                      - Throwable
java.lang.NullPointerException
	at com.servoy.j2db.FlattenedSolution.loadStyleForForm(FlattenedSolution.java:1464)
	at com.servoy.j2db.FlattenedSolution.getStyleForForm(FlattenedSolution.java:1423)
	at com.servoy.j2db.component.ComponentFactory.getStyleForForm(ComponentFactory.java:538)
	at com.servoy.j2db.component.ComponentFactory.getStyleForBasicComponent(ComponentFactory.java:551)
	at com.servoy.j2db.component.ComponentFactory.getStyleForBasicComponent(ComponentFactory.java:631)
	at com.servoy.j2db.component.ComponentFactory.createTabPanel(ComponentFactory.java:1929)
	at com.servoy.j2db.component.ComponentFactory.createComponentEx(ComponentFactory.java:462)
	at com.servoy.j2db.component.ComponentFactory.createComponent(ComponentFactory.java:358)
	at com.servoy.j2db.smart.dataui.DataRendererFactory.placeElements(DataRendererFactory.java:248)
	at com.servoy.j2db.smart.dataui.DataRendererFactory.completeRenderers(DataRendererFactory.java:212)
	at com.servoy.j2db.FormController.createDataRenderers(FormController.java:1676)
	at com.servoy.j2db.FormController.init(FormController.java:1522)
	at com.servoy.j2db.FormManager.leaseFormPanel(FormManager.java:900)
	at com.servoy.j2db.FormManager.getFormController(FormManager.java:803)
	at com.servoy.j2db.smart.dataui.FormLookupPanel.createFormPanel(FormLookupPanel.java:122)
	at com.servoy.j2db.smart.dataui.FormLookupPanel.getFormPanel(FormLookupPanel.java:184)
	at com.servoy.j2db.smart.dataui.FormLookupPanel.getDefaultSort(FormLookupPanel.java:163)
	at com.servoy.j2db.smart.dataui.SpecialTabPanel.getDefaultSort(SpecialTabPanel.java:331)
	at com.servoy.j2db.smart.dataui.SpecialTabPanel.setRecord(SpecialTabPanel.java:207)
	at com.servoy.j2db.dataprocessing.DataAdapterList.setRecord(DataAdapterList.java:377)
	at com.servoy.j2db.smart.dataui.DataRenderer.getListCellRendererComponent(DataRenderer.java:423)
	at com.servoy.j2db.smart.RecordView.syncSliderAndRefresh(RecordView.java:209)
	at com.servoy.j2db.smart.RecordView.valueChanged(RecordView.java:332)
	at com.servoy.j2db.smart.RecordView.setModelInternal(RecordView.java:101)
	at com.servoy.j2db.smart.RecordView.setModel(RecordView.java:307)
	at com.servoy.j2db.FormController.notifyVisible(FormController.java:3003)
	at com.servoy.j2db.smart.dataui.FormLookupPanel.notifyVisible(FormLookupPanel.java:215)
	at com.servoy.j2db.smart.dataui.SpecialTabPanel.notifyVisible(SpecialTabPanel.java:197)
	at com.servoy.j2db.dataprocessing.DataAdapterList.notifyVisible(DataAdapterList.java:499)
	at com.servoy.j2db.smart.dataui.DataRenderer.notifyVisible(DataRenderer.java:266)
	at com.servoy.j2db.FormController.notifyVisible(FormController.java:3078)
	at com.servoy.j2db.smart.dataui.FormLookupPanel.notifyVisible(FormLookupPanel.java:215)
	at com.servoy.j2db.smart.dataui.SpecialTabPanel.stateChanged(SpecialTabPanel.java:383)
	at com.servoy.j2db.smart.dataui.TablessPanel.setSelectedIndex(TablessPanel.java:199)
	at com.servoy.j2db.smart.dataui.SpecialTabPanel.js_setTabIndex(SpecialTabPanel.java:871)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:179)
	at org.mozilla.javascript.JavaMembers.put(JavaMembers.java:178)
	at org.mozilla.javascript.NativeJavaObject.put(NativeJavaObject.java:141)
	at org.mozilla.javascript.ScriptableObject.putProperty(ScriptableObject.java:1768)
	at org.mozilla.javascript.ScriptRuntime.setObjectProp(ScriptRuntime.java:1532)
	at org.mozilla.javascript.ScriptRuntime.setObjectProp(ScriptRuntime.java:1520)
	at org.mozilla.javascript.gen.c60._c0(core_project_link:417)
	at org.mozilla.javascript.gen.c60.call(core_project_link)
	at org.mozilla.javascript.optimizer.OptRuntime.call1(OptRuntime.java:65)
	at org.mozilla.javascript.gen.c59._c0(goToProject:740)
	at org.mozilla.javascript.gen.c59.call(goToProject)
	at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:387)
	at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3127)
	at org.mozilla.javascript.gen.c59.call(goToProject)
	at com.servoy.j2db.scripting.ScriptEngine.executeFunction(ScriptEngine.java:458)
	at com.servoy.j2db.FormController.executeFunction(FormController.java:3972)
	at com.servoy.j2db.FormController.executeFunction(FormController.java:3860)
	at com.servoy.j2db.FormController.executeFunction(FormController.java:3782)
	at com.servoy.j2db.FormController$ScriptExecuter.executeFunction(FormController.java:3637)
	at com.servoy.j2db.ui.BaseEventExecutor.fireEventCommand(BaseEventExecutor.java:270)
	at com.servoy.j2db.ui.BaseEventExecutor.fireActionCommand(BaseEventExecutor.java:217)
	at com.servoy.j2db.smart.dataui.AbstractScriptLabel$5.mouseReleased(AbstractScriptLabel.java:1023)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at javax.swing.plaf.basic.BasicTableUI$Handler.repostEvent(Unknown Source)
	at javax.swing.plaf.basic.BasicTableUI$Handler.mouseReleased(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at com.servoy.j2db.gui.FixedJTable.processMouseEvent(FixedJTable.java:133)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

If I preload it after solution starts I get:

java.lang.NullPointerException
	at com.servoy.j2db.FlattenedSolution.loadStyleForForm(FlattenedSolution.java:1464)
	at com.servoy.j2db.FlattenedSolution.getStyleForForm(FlattenedSolution.java:1423)
	at com.servoy.j2db.component.ComponentFactory.getStyleForForm(ComponentFactory.java:538)
	at com.servoy.j2db.component.ComponentFactory.getStyleForBasicComponent(ComponentFactory.java:551)
	at com.servoy.j2db.component.ComponentFactory.getStyleForBasicComponent(ComponentFactory.java:631)
	at com.servoy.j2db.component.ComponentFactory.createTabPanel(ComponentFactory.java:1929)
	at com.servoy.j2db.component.ComponentFactory.createComponentEx(ComponentFactory.java:462)
	at com.servoy.j2db.component.ComponentFactory.createComponent(ComponentFactory.java:358)
	at com.servoy.j2db.smart.dataui.DataRendererFactory.placeElements(DataRendererFactory.java:248)
	at com.servoy.j2db.smart.dataui.DataRendererFactory.completeRenderers(DataRendererFactory.java:212)
	at com.servoy.j2db.FormController.createDataRenderers(FormController.java:1676)
	at com.servoy.j2db.FormController.init(FormController.java:1522)
	at com.servoy.j2db.FormManager.leaseFormPanel(FormManager.java:900)
	at com.servoy.j2db.scripting.CreationalPrototype.get(CreationalPrototype.java:172)
	at org.mozilla.javascript.ScriptableObject.getProperty(ScriptableObject.java:1641)
	at org.mozilla.javascript.ScriptRuntime.getObjectProp(ScriptRuntime.java:1429)
	at org.mozilla.javascript.ScriptRuntime.getObjectProp(ScriptRuntime.java:1418)
	at org.mozilla.javascript.gen.c17._c0(preLoadFormsAndRecords:176)
	at org.mozilla.javascript.gen.c17.call(preLoadFormsAndRecords)
	at org.mozilla.javascript.optimizer.OptRuntime.callProp0(OptRuntime.java:111)
	at org.mozilla.javascript.gen.c6._c0(on_solution_open:166)
	at org.mozilla.javascript.gen.c6.call(on_solution_open)
	at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:387)
	at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3127)
	at org.mozilla.javascript.gen.c6.call(on_solution_open)
	at com.servoy.j2db.scripting.ScriptEngine.executeFunction(ScriptEngine.java:458)
	at com.servoy.j2db.FormManager.makeSolutionSettings(FormManager.java:323)
	at com.servoy.j2db.smart.SwingFormManager.makeSolutionSettings(SwingFormManager.java:189)
	at com.servoy.j2db.FormManager$1.run(FormManager.java:158)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

Thanks!

2

I made a mistake. The server is running 5.2.2 -build 1002, while on the developer I have 5.2.7 - build 1013 and I don’t get the exception in developer.
Is anything changed from 5.2.2 to 5.2.7 that I should pay attention to?

Thanks,
Gabriel

3

A nullPointer exception should never occur. If it does, it’s something in under lying Java code, so most likely something inside Servoy or in a 3rd party plugin.

Between Servoy 5.2.2. and Servoy 5.2.8 there are basically a lot of fixes, as they are maintenance releases, so the first step would be to upgrade.

Paul

4

Thanks Paul,

the update to 5.2.8 fixed the problem.

Bye,
Gabriel

5

Actually, the upgrade didn’t fix it after all.

The error was caused by two tabpanels on a form, which had the style set on DEFAULT. Once I’ve change that to something else, the error went away.

I suppose that instead of using the default settings for the tabpanels, Servoy was looking for a style called “DEFAULT”.

This form is upgraded from 4 to 5, so maybe after the upgrade the “DEFAULT” setting was still there, instead of being deleted, it that was the desired behavior.

Even if I change the style to something else, and then back to DEFAULT the error appears again.

Have a nice day!
Gabriel

6

Gabriel,

If you can reproduce that in a small sample, then please file a case with that.

Rob