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.tool.profile.core.mock;
  
  import java.lang.annotation.Annotation;
  import org.apache.skywalking.oap.server.core.UnexpectedException;
  import org.apache.skywalking.oap.server.core.analysis.Stream;
  import org.apache.skywalking.oap.server.core.analysis.StreamAnnotationListener;
  import org.apache.skywalking.oap.server.core.analysis.worker.NoneStreamProcessor;
  import org.apache.skywalking.oap.server.core.analysis.worker.RecordStreamProcessor;
  import org.apache.skywalking.oap.server.core.annotation.AnnotationListener;
  import org.apache.skywalking.oap.server.core.storage.StorageException;
  import org.apache.skywalking.oap.server.library.module.ModuleDefineHolder;
  
  /**
   * Mock from {@link StreamAnnotationListener}
   */
  public class MockStreamAnnotationListener implements AnnotationListener {
  
      private final ModuleDefineHolder moduleDefineHolder;
  
      public MockStreamAnnotationListener(ModuleDefineHolder moduleDefineHolder) {
          this.moduleDefineHolder = moduleDefineHolder;
      }
  
      @Override
      public Class<? extends Annotation> annotation() {
          return Stream.class;
      }
  
      @Override
      public void notify(Class aClass) throws StorageException {
          if (aClass.isAnnotationPresent(Stream.class)) {
              Stream stream = (Stream) aClass.getAnnotation(Stream.class);
  
              if (stream.processor().equals(RecordStreamProcessor.class)) {
                  RecordStreamProcessor.getInstance().create(moduleDefineHolder, stream, aClass);
              } else if (stream.processor().equals(NoneStreamProcessor.class)) {
                  NoneStreamProcessor.getInstance().create(moduleDefineHolder, stream, aClass);
              }
          } else {
              throw new UnexpectedException(
                  "Stream annotation listener could only parse the class present stream annotation.");
          }
      }
  }
  