Bug 145287 New a style on an item in library when the theme is recreated
Details: New a style on an item in library when the theme is recreated Step: 1.New a library. 2.Open the outline and delete the defaultTheme. 3.Create a new theme named newTheme. 4.Add a label. 5.Select the lable and new a style. Actual result: An error is pop up. org.eclipse.birt.report.designer.core.runtime.GUIException: Caused by java.lang.NullPointerException. at org.eclipse.birt.report.designer.core.runtime.GUIException.createGUIException(GUIException.java:76) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:123) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:105) at org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.AddStyleAction.run(AddStyleAction.java:107) at org.eclipse.jface.action.Action.runWithEvent(Action.java:499) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:539) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:400) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:928) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3348) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2968) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177) 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:585) at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336) at org.eclipse.core.launcher.Main.basicRun(Main.java:280) at org.eclipse.core.launcher.Main.run(Main.java:977) at org.eclipse.core.launcher.Main.main(Main.java:952) Caused by: java.lang.NullPointerException at org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.AddStyleAction.run(AddStyleAction.java:96)
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
return -1;
	}
	/**
	 * Check if the given element is linked from a library or not.
	 * 
	 * @param handle
	 *            the handle of the element to check
	 * @return true if it is linked from a library ,or false if else;
	 * 
	 */
	public static boolean isLinked( DesignElementHandle handle )
	{
		if ( handle.getExtends( ) != null )
		{
			return handle.getExtends( ).getRoot( ) instanceof LibraryHandle;
		}
		return false;
	}
	/**
	 * Return the group list of the given element.
	 * 
	 * @param handle
	 *            the handle of the element.
	 * @return the group list of the given element.
	 */
	public static List getGroups( DesignElementHandle handle )
	{
		List groupList = new ArrayList( );
		if ( handle instanceof ListingHandle )
		{