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.graph.client.psf.sample.sampleedgefeats;
  
  import com.tencent.angel.graph.client.psf.sample.SampleUtils;
  import com.tencent.angel.graph.utils.GraphMatrixUtils;
  import com.tencent.angel.ml.math2.vector.IntFloatVector;
  import com.tencent.angel.ml.matrix.psf.get.base.GetFunc;
  import com.tencent.angel.ml.matrix.psf.get.base.GetResult;
  import com.tencent.angel.ml.matrix.psf.get.base.PartitionGetParam;
  import com.tencent.angel.ml.matrix.psf.get.base.PartitionGetResult;
  import com.tencent.angel.ps.storage.vector.ServerLongAnyRow;
  import com.tencent.angel.psagent.matrix.transport.router.operator.ILongKeyPartOp;
  import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
  import java.util.List;
  import scala.Tuple2;
  
  public class SampleEdgeFeat extends GetFunc {
  
    /**
     * Create a new DefaultGetFunc.
     *
     * @param param parameter of get udf
     */
    public SampleEdgeFeat(SampleEdgeFeatParam param) {
      super(param);
    }
  
    public SampleEdgeFeat() {
      this(null);
    }
  
    @Override
    public PartitionGetResult partitionGet(PartitionGetParam partParam) {
      PartSampleEdgeFeatParam sampleParam = (PartSampleEdgeFeatParam) partParam;
      ServerLongAnyRow row = GraphMatrixUtils.getPSLongKeyRow(psContext, partParam);
  
      ILongKeyPartOp split = (ILongKeyPartOp) sampleParam.getIndicesPart();
      long[] nodeIds = split.getKeys();
  
      Tuple2<Long2ObjectOpenHashMap<long[]>, Long2ObjectOpenHashMap<IntFloatVector[]>> nodeId2SampleNeighbors =
          SampleUtils
              .sampleEdgeFeat(row, sampleParam.getCount(), nodeIds, System.currentTimeMillis());
  
      return new PartSampleEdgeFeatResult(sampleParam.getPartKey().getPartitionId(),
          nodeId2SampleNeighbors._1, nodeId2SampleNeighbors._2);
    }
  
    @Override
    public GetResult merge(List<PartitionGetResult> partResults) {
      Long2ObjectOpenHashMap<long[]> nodeIdToSampleNeighbors =
          new Long2ObjectOpenHashMap<>(((SampleEdgeFeatParam) param).getNodeIds().length);
      Long2ObjectOpenHashMap<IntFloatVector[]> nodeIdToEdgeFeats =
          new Long2ObjectOpenHashMap<>(((SampleEdgeFeatParam) param).getNodeIds().length);
  
      for (PartitionGetResult partResult : partResults) {
        // Sample part result
        PartSampleEdgeFeatResult partSampleResult = (PartSampleEdgeFeatResult) partResult;
  
        // Neighbors
        Long2ObjectOpenHashMap<long[]> partNodeIdToSampleNeighbors = partSampleResult
            .getNodeIdToSampleNeighbors();
        if (partNodeIdToSampleNeighbors != null) {
          nodeIdToSampleNeighbors.putAll(partNodeIdToSampleNeighbors);
        }
  
        // EdgeFeatures
        Long2ObjectOpenHashMap<IntFloatVector[]> partNodeIdToEdgeFeats = partSampleResult
            .getNodeIdToSampleEdgeFeats();
        if (partNodeIdToSampleNeighbors != null) {
          nodeIdToEdgeFeats.putAll(partNodeIdToEdgeFeats);
        }
      }
      return new SampleEdgeFeatResult(nodeIdToSampleNeighbors, nodeIdToEdgeFeats);
    }
  }
  