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.math2.VFactory;
  import com.tencent.angel.ml.matrix.psf.get.base.*;
  import com.tencent.angel.ml.matrix.psf.get.getrow.GetRowResult;
  import com.tencent.angel.ml.matrix.psf.get.indexed.IndexPartGetLongResult;
  import com.tencent.angel.ps.storage.partition.ServerPartition;
  import com.tencent.angel.ps.storage.vector.ServerLongAnyRow;
  import com.tencent.angel.psagent.matrix.ResponseType;
  import com.tencent.angel.sona.psf.pagerank.GetNodesParam;
  import it.unimi.dsi.fastutil.longs.LongArrayList;
  
  import java.util.List;
  
  public class GetNodes extends GetFunc {
  
    public GetNodes(int matrixId, int[] partitionIds) {
      this(new GetNodesParam(matrixId, partitionIds));
    }
  
    public GetNodes(GetParam param) {
      super(param);
    }
  
    public GetNodes() {
      super(null);
    }
  
    @Override
    public PartitionGetResult partitionGet(PartitionGetParam partParam) {
      ServerPartition part = psContext.getMatrixStorageManager().getPart(partParam.getPartKey());
      ServerLongAnyRow row = (ServerLongAnyRow) psContext.getMatrixStorageManager().getRow(partParam.getPartKey(), 0);
      LongArrayList ret = new LongArrayList();
      for (long node = partParam.getPartKey().getStartCol(); node < partParam.getPartKey().getEndCol(); node++) {
        if (row.exist(node)) {
          ret.add(node);
        }
      }
      return new IndexPartGetLongResult(part.getPartitionKey(), ret.toLongArray());
    }
  
    @Override
    public GetResult merge(List<PartitionGetResult> partResults) {
      LongArrayList ret = new LongArrayList();
      for (PartitionGetResult result : partResults) {
        if (result instanceof IndexPartGetLongResult) {
          long[] values = ((IndexPartGetLongResult) result).getValues();
          for (int i = 0; i < values.length; i++)
            ret.add(values[i]);
        }
      }
      return new GetRowResult(ResponseType.SUCCESS,
          VFactory.denseLongVector(ret.toLongArray()));
    }
  }
  