code: protected String determineDefaultSegmentValue(Properties params) {
  		boolean preferSegmentPerEntity = ConfigurationHelper.getBoolean( CONFIG_PREFER_SEGMENT_PER_ENTITY, params, false );
  		String defaultToUse = preferSegmentPerEntity ? params.getProperty( PersistentIdentifierGenerator.TABLE ) : DEF_SEGMENT_VALUE;
  		log.infof( "explicit segment value for id generator [%1$s.%2$s] suggested; using default [%3$s]", tableName, segmentColumnName, defaultToUse );
  		return defaultToUse;
  	}
docs: Used in the cases where {@link #determineSegmentValue} is unable to
  determine the value to use.
  
  @param params The params supplied in the generator config (plus some standard useful extras).
  
  @return The default segment value to use.