Context cx = Context.enter();
	public DataEngineImpl( DataEngineContext context )	{		assert context != null;				logger.entering( DataEngineImpl.class.getName( ),				"DataEngineImpl",				context );				this.context = context;		this.sharedScope = context.getJavaScriptScope( );		if ( this.sharedScope == null )		{			Context cx = Context.enter();			this.sharedScope = new ImporterTopLevel( cx );			Context.exit();		}				compiler = new ExpressionCompiler( );				logger.exiting( DataEngineImpl.class.getName( ), "DataEngineImpl" );		logger.log( Level.INFO, "Data Engine starts up" );	}