Bug 189598 [linux][smoke]GUIException when new style in Layout or through main menu[0300]
Description: GUIException when new style in Layout or through main menu Build number:2.2.0.v200705291039 Steps to reproduce: 1. New a report. 2. New a style by right click in Layout. 3. New a style through main menu Expected result: A new style is inserted. Actual result: Fail to new style and throw exception. Error log:N/A
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/command/SelectionHandler.java
return null;
	}
	protected Object getFirstSelectVariable( )
	{
		IEvaluationContext context = (IEvaluationContext) event.getApplicationContext( );
		Object selectVariable = context.getVariable( ISources.ACTIVE_CURRENT_SELECTION_NAME );
		Object selectList = selectVariable;
		if ( selectVariable instanceof StructuredSelection )
		{
			selectList = ( (StructuredSelection) selectVariable ).toList( );
		}
		if ( selectList instanceof List && ( (List) selectList ).size( ) > 0 )
		{
			selectVariable = getFirstElement( (List) selectList );
		}
		return selectVariable;
	}
	/**
	 * Gets table edit part.
	 * 
	 * @return the table edit part
	 */
	protected TableEditPart getTableEditPart( )
	{
		List list = (List) getSelectedObjects( );
		if ( list.isEmpty( ) )
		{
			return null;
		}
		TableEditPart part = null;