content: /*
   * 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.asterix.runtime.operators;
  
  import java.util.Map;
  
  import org.apache.hyracks.api.job.profiling.IOperatorStats;
  import org.apache.hyracks.api.job.profiling.IndexStats;
  
  /**
   * Helper method to access stats produced by {@link DatasetStreamStatsOperatorDescriptor}
   */
  public final class DatasetStreamStats {
  
      private final long cardinality;
  
      private final int avgTupleSize;
  
      private final Map<String, IndexStats> indexesStats;
  
      public DatasetStreamStats(IOperatorStats opStats) {
          this.cardinality = opStats.getTupleCounter().get();
          long totalTupleSize = opStats.getPageReads().get();
          this.avgTupleSize = cardinality > 0 ? (int) (totalTupleSize / cardinality) : 0;
          this.indexesStats = opStats.getIndexesStats();
      }
  
      static void update(IOperatorStats opStats, long tupleCount, long tupleSize, Map<String, IndexStats> indexStats) {
          opStats.getTupleCounter().update(tupleCount);
          opStats.getPageReads().update(tupleSize);
          opStats.updateIndexesStats(indexStats);
      }
  
      public long getCardinality() {
          return cardinality;
      }
  
      public int getAvgTupleSize() {
          return avgTupleSize;
      }
  
      public Map<String, IndexStats> getIndexesStats() {
          return indexesStats;
      }
  }
  