private static function getPostFix( $contentClassAttributeIdentifier )
 {
     $ini = eZINI::instance( 'ezfind.ini' );
     $tab_attributeIdentifier = $ini->variable( 'SolrFieldMapSettings', 'AttributeMap' );
     $suffix = 'text';
     if ( array_key_exists( $contentClassAttributeIdentifier, $tab_attributeIdentifier ) )
     {
         $suffix = $tab_attributeIdentifier[$contentClassAttributeIdentifier];
     }
     return ezfSolrDocumentFieldName::getPostFix( $suffix );
 }