code: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  
  package org.apache.skywalking.oap.server.analyzer.provider.trace.parser.listener;
  
  import org.apache.skywalking.apm.network.language.agent.v3.SpanLayer;
  import org.apache.skywalking.oap.server.core.analysis.Layer;
  
  /**
   * The common logic for specific listeners.
   */
  abstract class CommonAnalysisListener {
      /**
       * Identify the layer of span's service/instance owner. Such as  ${@link Layer#FAAS} and ${@link Layer#GENERAL}.
       */
      protected Layer identifyServiceLayer(SpanLayer spanLayer) {
          if (SpanLayer.FAAS.equals(spanLayer)) {
              // function as a Service
              return Layer.FAAS;
          } else {
              return Layer.GENERAL;
          }
      }
  }
  