gwt cell table error

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Noor

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Jan 6, 2011, 3:48:02 PM1/6/11
to Google Web Toolkit

I am getting an error on this where


CellBrowser cellBrowser_1 = new
CellBrowser(Model1,SelectedCategory.getAllAttributes());

I have tested SelectedCategory.getAllAttributes() and it is not
null, also model1 has been declared
stack trace:
00:42:31.294 [ERROR] [biddingsystem] Uncaught exception escaped
com.google.gwt.event.shared.UmbrellaException: One or more exceptions
caught, see full set in UmbrellaException#getCauses
at
com.google.gwt.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:
214)
at
com.google.gwt.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:
103)
at
com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:
96)
at com.google.gwt.view.client.SelectionModel
$AbstractSelectionModel.fireEvent(SelectionModel.java:70)
at
com.google.gwt.view.client.SelectionChangeEvent.fire(SelectionChangeEvent.java:
54)
at
com.google.gwt.view.client.SingleSelectionModel.resolveChanges(SingleSelectionModel.java:
108)
at
com.google.gwt.view.client.SingleSelectionModel.isSelected(SingleSelectionModel.java:
63)
at
com.google.gwt.user.cellview.client.HasDataPresenter.setRowData(HasDataPresenter.java:
710)
at
com.google.gwt.user.cellview.client.AbstractHasData.setRowData(AbstractHasData.java:
539)
at
com.google.gwt.view.client.AbstractDataProvider.updateRowData(AbstractDataProvider.java:
224)
at
com.google.gwt.view.client.ListDataProvider.onRangeChanged(ListDataProvider.java:
529)
at
com.google.gwt.view.client.AbstractDataProvider.addDataDisplay(AbstractDataProvider.java:
105)
at com.google.gwt.view.client.TreeViewModel
$DefaultNodeInfo.setDataDisplay(TreeViewModel.java:85)
at
com.google.gwt.user.cellview.client.CellBrowser.appendTreeNode(CellBrowser.java:
917)
at
com.google.gwt.user.cellview.client.CellBrowser.setChildState(CellBrowser.java:
1007)
at com.google.gwt.user.cellview.client.CellBrowser.access
$7(CellBrowser.java:978)
at com.google.gwt.user.cellview.client.CellBrowser
$BrowserCellList.doKeyboardSelection(CellBrowser.java:327)
at
com.google.gwt.user.cellview.client.CellList.onBrowserEvent2(CellList.java:
394)
at com.google.gwt.user.cellview.client.CellBrowser
$BrowserCellList.onBrowserEvent2(CellBrowser.java:233)
at
com.google.gwt.user.cellview.client.AbstractHasData.onBrowserEvent(AbstractHasData.java:
467)
at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1308)
at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1264)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
157)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:
326)
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:
207)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
126)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
561)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:
269)
at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:
91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:214)
at sun.reflect.GeneratedMethodAccessor292.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
157)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:
281)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:
531)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:
352)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException: null
at
com.google.gwt.user.cellview.client.CellBrowser.createDisplay(CellBrowser.java:
939)
at
com.google.gwt.user.cellview.client.CellBrowser.appendTreeNode(CellBrowser.java:
889)
at
com.google.gwt.user.cellview.client.CellBrowser.<init>(CellBrowser.java:
768)
at
com.google.gwt.user.cellview.client.CellBrowser.<init>(CellBrowser.java:
720)
at com.BiddingSystem.client.Presenter.ProductTaxonomyPresenter
$2$2.onSelectionChange(ProductTaxonomyPresenter.java:236)
at
com.google.gwt.view.client.SelectionChangeEvent.dispatch(SelectionChangeEvent.java:
83)
at
com.google.gwt.view.client.SelectionChangeEvent.dispatch(SelectionChangeEvent.java:
1)
at
com.google.gwt.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:
204)
at
com.google.gwt.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:
103)
at
com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:
96)
at com.google.gwt.view.client.SelectionModel
$AbstractSelectionModel.fireEvent(SelectionModel.java:70)
at
com.google.gwt.view.client.SelectionChangeEvent.fire(SelectionChangeEvent.java:
54)
at
com.google.gwt.view.client.SingleSelectionModel.resolveChanges(SingleSelectionModel.java:
108)
at
com.google.gwt.view.client.SingleSelectionModel.isSelected(SingleSelectionModel.java:
63)
at
com.google.gwt.user.cellview.client.HasDataPresenter.setRowData(HasDataPresenter.java:
710)
at
com.google.gwt.user.cellview.client.AbstractHasData.setRowData(AbstractHasData.java:
539)
at
com.google.gwt.view.client.AbstractDataProvider.updateRowData(AbstractDataProvider.java:
224)
at
com.google.gwt.view.client.ListDataProvider.onRangeChanged(ListDataProvider.java:
529)
at
com.google.gwt.view.client.AbstractDataProvider.addDataDisplay(AbstractDataProvider.java:
105)
at com.google.gwt.view.client.TreeViewModel
$DefaultNodeInfo.setDataDisplay(TreeViewModel.java:85)
at
com.google.gwt.user.cellview.client.CellBrowser.appendTreeNode(CellBrowser.java:
917)
at
com.google.gwt.user.cellview.client.CellBrowser.setChildState(CellBrowser.java:
1007)
at com.google.gwt.user.cellview.client.CellBrowser.access
$7(CellBrowser.java:978)
at com.google.gwt.user.cellview.client.CellBrowser
$BrowserCellList.doKeyboardSelection(CellBrowser.java:327)
at
com.google.gwt.user.cellview.client.CellList.onBrowserEvent2(CellList.java:
394)
at com.google.gwt.user.cellview.client.CellBrowser
$BrowserCellList.onBrowserEvent2(CellBrowser.java:233)
at
com.google.gwt.user.cellview.client.AbstractHasData.onBrowserEvent(AbstractHasData.java:
467)
at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1308)
at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1264)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
157)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:
326)
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:
207)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
126)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
561)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:
269)
at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:
91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:214)
at sun.reflect.GeneratedMethodAccessor292.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
157)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:
281)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:
531)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:
352)
at java.lang.Thread.run(Thread.java:662)

Thomas Broyer

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Jan 6, 2011, 7:10:20 PM1/6/11
to google-we...@googlegroups.com
It looks like you're trying to display a 'null' NodeInfo:
In other words, your TreeViewModel returns 'null' from getNodeInfo for the rootValue you're using (i.e. Model1.getNodeInfo(SelectedCategory.getAllAttributes()) returns 'null')
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