private List < IndexExpression > getIndexExpressions ( ) throws IOException { UDFContext context = UDFContext . getUDFContext ( ) ; Properties property = context . getUDFProperties ( AbstractCassandraStorage . class ) ; if ( property . getProperty ( PARTITION_FILTER_SIGNATURE ) != null ) return indexExpressionsFromString ( property . getProperty ( PARTITION_FILTER_SIGNATURE ) ) ; else return null ; }
get a list of index expression