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.core.profiling.trace.analyze;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.stream.Collectors;
  
  import lombok.Data;
  import org.apache.skywalking.oap.server.core.profiling.trace.ProfileThreadSnapshotRecord;
  import org.apache.skywalking.oap.server.core.query.input.SegmentProfileAnalyzeQuery;
  import org.apache.skywalking.oap.server.core.query.type.ProfileStackTree;
  import org.apache.skywalking.oap.server.core.storage.profiling.trace.IProfileThreadSnapshotQueryDAO;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  @Data
  public class ProfileStackAnalyze {
  
      private ProfileStackData data;
      private List<ProfileStackElementMatcher> expected;
  
      public void analyzeAndAssert(int maxAnalyzeCount) throws IOException {
          List<ProfileThreadSnapshotRecord> stacks = data.transformSnapshots();
          final List<SegmentProfileAnalyzeQuery> queries = data.transformQueries();
  
          List<ProfileStackTree> trees = buildAnalyzer(stacks, maxAnalyzeCount).analyze(queries).getTrees();
  
          assertNotNull(trees);
          assertEquals(trees.size(), expected.size());
          for (int i = 0; i < trees.size(); i++) {
              expected.get(i).verify(trees.get(i));
          }
      }
  
      private ProfileAnalyzer buildAnalyzer(List<ProfileThreadSnapshotRecord> stacks, int maxAnalyzeCount) throws IOException {
          ProfileAnalyzer analyzer = new ProfileAnalyzer(null, 2, maxAnalyzeCount);
          analyzer.profileThreadSnapshotQueryDAO = new ThreadSnapshotDAO(stacks);
          return analyzer;
      }
  
      static class ThreadSnapshotDAO implements IProfileThreadSnapshotQueryDAO {
  
          private final List<ProfileThreadSnapshotRecord> stacks;
  
          public ThreadSnapshotDAO(List<ProfileThreadSnapshotRecord> stacks) {
              this.stacks = stacks;
          }
  
          @Override
          public List<String> queryProfiledSegmentIdList(String taskId) throws IOException {
              return null;
          }
  
          @Override
          public int queryMinSequence(String segmentId, long start, long end) throws IOException {
              for (ProfileThreadSnapshotRecord stack : stacks) {
                  if (stack.getDumpTime() >= start) {
                      return stack.getSequence();
                  }
              }
              return 0;
          }
  
          @Override
          public int queryMaxSequence(String segmentId, long start, long end) throws IOException {
              for (int i = stacks.size() - 1; i >= 0; i--) {
                  if (stacks.get(i).getDumpTime() <= end) {
                      return stacks.get(i).getSequence();
                  }
              }
              return stacks.size();
          }
  
          @Override
          public List<ProfileThreadSnapshotRecord> queryRecords(String segmentId, int minSequence, int maxSequence) throws IOException {
              return stacks.stream()
                      .filter(s -> s.getSequence() >= minSequence)
                      .filter(s -> s.getSequence() < maxSequence)
                      .collect(Collectors.toList());
          }
  
      }
  
  }
  