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.sampleneighbor;
  
  import com.tencent.angel.graph.client.psf.sample.SampleUtils;
  import com.tencent.angel.graph.utils.GraphMatrixUtils;
  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;
  import scala.Tuple3;
  
  public class SampleNeighborWithType extends GetFunc {
  
    /**
     * Create a new DefaultGetFunc.
     *
     * @param param parameter of get udf
     */
    public SampleNeighborWithType(SampleNeighborWithTypeParam param) {
      super(param);
    }
  
    public SampleNeighborWithType() {
      this(null);
    }
  
    @Override
    public PartitionGetResult partitionGet(PartitionGetParam partParam) {
      PartSampleNeighborWithTypeParam sampleParam = (PartSampleNeighborWithTypeParam) partParam;
      ServerLongAnyRow row = GraphMatrixUtils.getPSLongKeyRow(psContext, partParam);
  
      ILongKeyPartOp split = (ILongKeyPartOp) sampleParam.getIndicesPart();
      long[] nodeIds = split.getKeys();
  
      SampleType sampleType = sampleParam.getSampleType();
      switch (sampleType) {
        case NODE:
        case EDGE: {
          Tuple2<Long2ObjectOpenHashMap<long[]>, Long2ObjectOpenHashMap<int[]>> nodeId2SampleNeighbors = SampleUtils
              .sampleWithType(row, sampleParam.getCount(),
                  nodeIds, sampleType, System.currentTimeMillis());
  
          return new PartSampleNeighborResultWithType(sampleParam.getPartKey().getPartitionId(),
              nodeId2SampleNeighbors._1, nodeId2SampleNeighbors._2, sampleType);
        }
  
        case NODE_AND_EDGE: {
          Tuple3<Long2ObjectOpenHashMap<long[]>, Long2ObjectOpenHashMap<int[]>,
              Long2ObjectOpenHashMap<int[]>> nodeId2SampleNeighbors = SampleUtils
              .sampleWithBothType(row,
                  sampleParam.getCount(), nodeIds, System.currentTimeMillis());
  
          return new PartSampleNeighborResultWithType(sampleParam.getPartKey().getPartitionId(),
              nodeId2SampleNeighbors._1(), nodeId2SampleNeighbors._2(), nodeId2SampleNeighbors._3());
        }
  
        default: {
          throw new UnsupportedOperationException("Not support sample type " + sampleType + " now");
        }
      }
    }
  
    @Override
    public GetResult merge(List<PartitionGetResult> partResults) {
      SampleType sampleType = ((SampleNeighborWithTypeParam) param).getSampleType();
  
      Long2ObjectOpenHashMap<long[]> nodeIdToSampleNeighbors =
          new Long2ObjectOpenHashMap<>(((SampleNeighborParam) param).getNodeIds().length);
      Long2ObjectOpenHashMap<int[]> nodeIdToSampleNeighborType =
          new Long2ObjectOpenHashMap<>(((SampleNeighborParam) param).getNodeIds().length);
      Long2ObjectOpenHashMap<int[]> nodeIdToSampleEdgeType =
          new Long2ObjectOpenHashMap<>(((SampleNeighborParam) param).getNodeIds().length);
  
      for (PartitionGetResult partResult : partResults) {
        // Sample part result
        PartSampleNeighborResultWithType partSampleResult = (PartSampleNeighborResultWithType) partResult;
  
        // Neighbors
        Long2ObjectOpenHashMap<long[]> partNodeIdToSampleNeighbors = partSampleResult
            .getNodeIdToSampleNeighbors();
        if (partNodeIdToSampleNeighbors != null) {
          nodeIdToSampleNeighbors.putAll(partNodeIdToSampleNeighbors);
        }
  
        // Neighbors type
        Long2ObjectOpenHashMap<int[]> partNodeIdToSampleNeighborsType = partSampleResult
            .getNodeIdToSampleNeighborsType();
        if (partNodeIdToSampleNeighborsType != null) {
          nodeIdToSampleNeighborType.putAll(partNodeIdToSampleNeighborsType);
        }
  
        // Edge type
        Long2ObjectOpenHashMap<int[]> partNodeIdToSampleEdgesType = partSampleResult
            .getNodeIdToSampleEdgeType();
        if (partNodeIdToSampleEdgesType != null) {
          nodeIdToSampleEdgeType.putAll(partNodeIdToSampleEdgesType);
        }
      }
  
      if (sampleType == SampleType.NODE) {
        return new SampleNeighborResultWithType(nodeIdToSampleNeighbors,
            nodeIdToSampleNeighborType, null);
      } else if (sampleType == SampleType.EDGE) {
        return new SampleNeighborResultWithType(nodeIdToSampleNeighbors, null,
            nodeIdToSampleEdgeType);
      } else {
        return new SampleNeighborResultWithType(nodeIdToSampleNeighbors, nodeIdToSampleNeighborType,
            nodeIdToSampleEdgeType);
      }
    }
  }
  