Bug 25729 Java editor opening up build.xml
Using Java editor to open .xml usually works. But when opening Ant build file (build.xml), it gives the NullPointerException and the IDE no longer works. !ENTRY org.eclipse.ui 4 4 Nov 05, 2002 09:28:39.131 !MESSAGE Unhandled exception caught in event loop. !ENTRY org.eclipse.ui 4 0 Nov 05, 2002 09:28:39.131 !MESSAGE java.lang.NullPointerException !STACK 0 java.lang.NullPointerException at org.eclipse.ui.internal.WorkbenchWindow$12.shellActivated(WorkbenchWindow. java:1454) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:157) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:77) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:825) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:850) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:830) at org.eclipse.swt.widgets.Decorations.WM_ACTIVATE (Decorations.java:1246) at org.eclipse.swt.widgets.Shell.WM_ACTIVATE(Shell.java:1139) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2689) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1218) at org.eclipse.swt.widgets.Display.windowProc(Display.java:2172) at org.eclipse.swt.internal.win32.OS.DestroyWindow(Native Method) at org.eclipse.swt.widgets.Control.destroyWidget(Control.java:497) at org.eclipse.swt.widgets.Widget.dispose(Widget.java:358) at org.eclipse.swt.widgets.Shell.dispose(Shell.java:470) at org.eclipse.jface.window.Window.close(Window.java:223) at org.eclipse.jface.dialogs.Dialog.close(Dialog.java:676) at org.eclipse.jface.dialogs.MessageDialog.buttonPressed(MessageDialog.java:1 41) at org.eclipse.jface.dialogs.Dialog$1.widgetSelected(Dialog.java:397) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:87) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:77) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:825) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:1692) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1410) at org.eclipse.jface.window.Window.runEventLoop(Window.java:561) at org.eclipse.jface.window.Window.open(Window.java:541) at org.eclipse.jface.dialogs.MessageDialog.openQuestion(MessageDialog.java:31 8) at org.eclipse.ui.internal.Workbench$1.handleException(Workbench.java:222) at org.eclipse.core.internal.runtime.InternalPlatform.handleException(Interna lPlatform.java:439) at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.ja va:841) at org.eclipse.core.runtime.Platform.run(Platform.java:413) at org.eclipse.ui.internal.Workbench.busyClose(Workbench.java:208) at org.eclipse.ui.internal.Workbench.access$5(Workbench.java:206) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:363) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:65) at org.eclipse.ui.internal.Workbench.close(Workbench.java:361) at org.eclipse.ui.internal.Workbench.close(Workbench.java:353) at org.eclipse.ui.internal.Workbench.close(Workbench.java:347) at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:355 ) at org.eclipse.ui.internal.WorkbenchWindow.access$3(WorkbenchWindow.java:348) at org.eclipse.ui.internal.WorkbenchWindow$2.run(WorkbenchWindow.java:404) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:65) at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:402) at org.eclipse.jface.window.Window.handleShellCloseEvent (Window.java:482) at org.eclipse.jface.window.Window$2.shellClosed(Window.java:433) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:152) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:77) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:825) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:850) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:834) at org.eclipse.swt.widgets.Decorations.WM_CLOSE(Decorations.java:1258) at org.eclipse.swt.widgets.Shell.WM_CLOSE(Shell.java:1148) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2692) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1218) at org.eclipse.swt.widgets.Display.windowProc(Display.java:2172) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1281) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:73) at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:392) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2766) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1218) at org.eclipse.swt.widgets.Display.windowProc(Display.java:2172) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1286) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1408) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1419) at org.eclipse.ui.internal.Workbench.run(Workbench.java:1402) at org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.j ava:831) at org.eclipse.core.boot.BootLoader.run(BootLoader.java:462) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: 39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorIm pl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.eclipse.core.launcher.Main.basicRun(Main.java:247) at org.eclipse.core.launcher.Main.run(Main.java:703) at org.eclipse.core.launcher.Main.main(Main.java:539)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
/*
	 * @see AbstractTextEditor#getAdapter(Class)
	 */
	public Object getAdapter(Class required) {
		
		if (IContentOutlinePage.class.equals(required)) {
			if (fOutlinePage == null)
				fOutlinePage= createOutlinePage();
			return fOutlinePage;
		}
		
		if (IEncodingSupport.class.equals(required))
			return fEncodingSupport;
			
		return super.getAdapter(required);
	}
	
	protected void setSelection(ISourceReference reference, boolean moveCursor) {
		
		ISelection selection= getSelectionProvider().getSelection();
		if (selection instanceof TextSelection) {
			TextSelection textSelection= (TextSelection) selection;
			if (textSelection.getOffset() != 0 || textSelection.getLength() != 0)
				markInNavigationHistory();
		}
		
		if (reference != null) {
			
			StyledText  textWidget= null;