code: @SneakyThrows
      public void init(final ExtractorRuleDefinitionEntity ruleDefinitionEntity) {
          for (ExtractorRuleEntity each : ruleDefinitionEntity.getRules()) {
              rules.put(each.getId(), (SQLSegmentExtractor) Class.forName(each.getExtractorClass()).newInstance());
          }
      }
docs: Initialize SQL extractor rule definition.
  
  @param ruleDefinitionEntity extractor rule definition entity