content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * Licensed 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
   *
   * https://opensource.org/licenses/Apache-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 com.tencent.angel.sona.psf.hyperanf;
  import com.clearspring.analytics.stream.cardinality.HyperLogLogPlus;
  import com.tencent.angel.ml.matrix.psf.update.base.PartitionUpdateParam;
  import com.tencent.angel.ml.matrix.psf.update.base.UpdateFunc;
  import com.tencent.angel.ps.storage.vector.ServerLongAnyRow;
  import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
  import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
  import it.unimi.dsi.fastutil.objects.ObjectIterator;
  
  public class UpdateHyperLogLog extends UpdateFunc {
  
    public UpdateHyperLogLog(UpdateHyperLogLogParam param) {
      super(param);
    }
  
    public UpdateHyperLogLog(int matrixId, Long2ObjectOpenHashMap<HyperLogLogPlus> updates, int p, int sp) {
      super(new UpdateHyperLogLogParam(matrixId, updates, p, sp));
    }
  
    public UpdateHyperLogLog() {
      super(null);
    }
  
    @Override
    public void partitionUpdate(PartitionUpdateParam partParam) {
      UpdateHyperLogLogPartParam param = (UpdateHyperLogLogPartParam) partParam;
      ServerLongAnyRow row = (ServerLongAnyRow) psContext.getMatrixStorageManager().getRow(param.getPartKey(), 0);
      Long2ObjectOpenHashMap<HyperLogLogPlus> updates = param.getUpdates();
      ObjectIterator<Long2ObjectMap.Entry<HyperLogLogPlus>> it =
          updates.long2ObjectEntrySet().fastIterator();
      row.startWrite();
      try {
        while (it.hasNext()) {
          Long2ObjectMap.Entry<HyperLogLogPlus> entry = it.next();
          long outNode = entry.getLongKey();
          HyperLogLogPlus outCounter = entry.getValue();
          if (!row.exist(outNode)) {
            row.set(outNode,new HyperLogLogPlusElement(outNode, param.getP(), param.getSp()));
          }
          HyperLogLogPlusElement hllElem = (HyperLogLogPlusElement) row.get(outNode);
          if (hllElem.isActive()) {
            hllElem.merge(outCounter);
          }
        }
      } finally {
        row.endWrite();
        param.clear();
      }
    }
  }
  