try
if ( resultMetaList == null )
	public List getMetaData( )	{		try		{			IExtractionResults result = extract( );			if ( result == null )				return null;			List listMeta = new ArrayList( );			listMeta.add( result.getResultMetaData( ) );			return listMeta;		}		catch ( BirtException be )		{			be.printStackTrace( );		}		return null;	}