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.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 com.tencent.angel.ps.storage.vector.element.IElement;
  import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
  import it.unimi.dsi.fastutil.objects.ObjectIterator;
  
  
  /**
   * UpdateFunc for computing the cardinality and closeness without normalization,
   * updating the activeness status, and switching the read/write counter
   */
  public class ComputeCloseness extends UpdateFunc {
  
    public ComputeCloseness(ComputeClosenessParam param) {
      super(param);
    }
  
    public ComputeCloseness(int matrixId, int r) {
      super(new ComputeClosenessParam(matrixId, r));
    }
  
    public ComputeCloseness() {
      super(null);
    }
  
    @Override
    public void partitionUpdate(PartitionUpdateParam partParam) {
      ComputeClosenessPartParam param = (ComputeClosenessPartParam) partParam;
      ServerLongAnyRow row = (ServerLongAnyRow) psContext.getMatrixStorageManager().getRow(param.getPartKey(), 0);
      int r = param.getR();
  
      ObjectIterator<Long2ObjectMap.Entry<IElement>> iter = row.iterator();
      while (iter.hasNext()) {
        HyperLogLogPlusElement hllElem = (HyperLogLogPlusElement) iter.next().getValue();
        if (hllElem.isActive()) {
          hllElem.updateCloseness(r);
        }
      }
    }
  }
  