private MetricInfo buildMetricInfo()

in oap-server/server-query-plugin/promql-plugin/src/main/java/org/apache/skywalking/oap/query/promql/rt/PromQLExprQueryVisitor.java [561:631]
69 lines of code
12 McCabe index (conditional complexity)

    private MetricInfo buildMetricInfo(String metricName,
                                       Layer layer,
                                       Scope scope,
                                       Map<LabelName, String> sysLabelMap,
                                       Optional<String> valueLabel,
                                       Optional<String> topNEntityName,
                                       Optional<String> recordName,
                                       boolean isMultiIntValues) throws IllegalExpressionException {

        MetricInfo metricInfo = new MetricInfo(metricName);
        valueLabel.ifPresent(s ->
                             {
                                 if (isMultiIntValues) {
                                     metricInfo.getLabels().add(new LabelValuePair(LabelName.LABELS.getLabel(), s));
                                 } else {
                                     DataLabel dataLabel = new DataLabel();
                                     dataLabel.put(s);
                                     for (Map.Entry<String, String> label : dataLabel.entrySet()) {
                                         metricInfo.getLabels().add(new LabelValuePair(label.getKey(), label.getValue()));
                                     }
                                 }
                             });
        metricInfo.getLabels().add(new LabelValuePair(LabelName.LAYER.getLabel(), layer.name()));
        switch (scope) {
            case Service:
                metricInfo.getLabels().add(new LabelValuePair(LabelName.SCOPE.getLabel(), Scope.Service.name()));
                if (topNEntityName.isPresent()) {
                    metricInfo.getLabels().add(new LabelValuePair(LabelName.SERVICE.getLabel(), topNEntityName.get()));
                } else if (recordName.isPresent()) {
                    metricInfo.getLabels().add(new LabelValuePair(LabelName.RECORD.getLabel(), recordName.get()));
                } else {
                    checkLabels(sysLabelMap, LabelName.SERVICE);
                    metricInfo.getLabels()
                              .add(new LabelValuePair(LabelName.SERVICE.getLabel(), sysLabelMap.get(LabelName.SERVICE)));
                }
                break;
            case ServiceInstance:
                metricInfo.getLabels().add(new LabelValuePair(LabelName.SCOPE.getLabel(), Scope.ServiceInstance.name()));
                if (topNEntityName.isPresent()) {
                    metricInfo.getLabels().add(new LabelValuePair(LabelName.SERVICE_INSTANCE.getLabel(), topNEntityName.get()));
                } else if (recordName.isPresent()) {
                    metricInfo.getLabels().add(new LabelValuePair(LabelName.RECORD.getLabel(), recordName.get()));
                } else {
                    checkLabels(sysLabelMap, LabelName.SERVICE, LabelName.SERVICE_INSTANCE);
                    metricInfo.getLabels()
                              .add(new LabelValuePair(LabelName.SERVICE.getLabel(), sysLabelMap.get(LabelName.SERVICE)));
                    metricInfo.getLabels()
                              .add(new LabelValuePair(
                                  LabelName.SERVICE_INSTANCE.getLabel(),
                                  sysLabelMap.get(LabelName.SERVICE_INSTANCE)
                              ));
                }
                break;
            case Endpoint:
                metricInfo.getLabels().add(new LabelValuePair(LabelName.SCOPE.getLabel(), Scope.Endpoint.name()));
                if (topNEntityName.isPresent()) {
                    metricInfo.getLabels().add(new LabelValuePair(LabelName.ENDPOINT.getLabel(), topNEntityName.get()));
                } else if (recordName.isPresent()) {
                    metricInfo.getLabels().add(new LabelValuePair(LabelName.RECORD.getLabel(), recordName.get()));
                } else {
                    checkLabels(sysLabelMap, LabelName.SERVICE, LabelName.ENDPOINT);
                    metricInfo.getLabels()
                              .add(new LabelValuePair(LabelName.SERVICE.getLabel(), sysLabelMap.get(LabelName.SERVICE)));
                    metricInfo.getLabels()
                              .add(new LabelValuePair(LabelName.ENDPOINT.getLabel(), sysLabelMap.get(LabelName.ENDPOINT)));
                }
                break;
        }

        return metricInfo;
    }