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.psf.triangle;
  
  import com.tencent.angel.ml.matrix.psf.get.base.*;
  import com.tencent.angel.ps.storage.matrix.ServerMatrix;
  import com.tencent.angel.ps.storage.partition.RowBasedPartition;
  import com.tencent.angel.ps.storage.partition.ServerPartition;
  import com.tencent.angel.ps.storage.vector.ServerLongAnyRow;
  import it.unimi.dsi.fastutil.ints.Int2ObjectArrayMap;
  import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
  
  import java.util.List;
  
  public class GetNeighborWithByteAttr extends GetFunc {
  
      /**
       * Create a new DefaultGetFunc.
       *
       * @param param parameter of get udf
       */
      public GetNeighborWithByteAttr(GetParam param) {
          super(param);
      }
  
      public GetNeighborWithByteAttr() {
          this(null);
      }
  
      @Override
      public PartitionGetResult partitionGet(PartitionGetParam partParam) {
          PartSampleNeighborWithAttrParam param = (PartSampleNeighborWithAttrParam) partParam;
          ServerMatrix matrix = psContext.getMatrixStorageManager().getMatrix(partParam.getMatrixId());
          ServerPartition part = matrix.getPartition(partParam.getPartKey().getPartitionId());
          ServerLongAnyRow row = (ServerLongAnyRow) (((RowBasedPartition) part).getRow(0));
          long[] nodeIds = param.getNodeIds();
  
          NeighborsAttrsCompressedElement[] elementsCompressed = new NeighborsAttrsCompressedElement[nodeIds.length];
  
          for (int i = 0; i < nodeIds.length; i++) {
              long nodeId = nodeIds[i];
              // Get node neighbors
              NeighborsAttrsCompressedElement elem = (NeighborsAttrsCompressedElement) (row.get(nodeId));
  
              if (elem == null) {
                  elementsCompressed[i] = null;
              } else {
                  elementsCompressed[i] = elem;
              }
          }
  
          return new PartGetNeighborWithAttrResult(part.getPartitionKey().getPartitionId(), elementsCompressed);
      }
  
      @Override
      public GetResult merge(List<PartitionGetResult> partResults) {
  
          Int2ObjectArrayMap<PartitionGetResult> partIdToResultMap = new Int2ObjectArrayMap<>(
                  partResults.size());
          for (PartitionGetResult result : partResults) {
              partIdToResultMap.put(((PartGetNeighborWithAttrResult) result).getPartId(), result);
          }
  
          GetNeighborWithByteAttrParam param = (GetNeighborWithByteAttrParam) getParam();
          long[] nodeIds = param.getNodeIds();
          List<PartitionGetParam> partParams = param.getPartParams();
          Long2ObjectOpenHashMap<NeighborsAttrsCompressedElement> nodeIdToNeighbors = new Long2ObjectOpenHashMap<>(nodeIds.length);
  
          for (PartitionGetParam partParam : partParams) {
              int start = ((PartSampleNeighborWithAttrParam) partParam).getStartIndex();
              int end = ((PartSampleNeighborWithAttrParam) partParam).getEndIndex();
              PartGetNeighborWithAttrResult partResult = (PartGetNeighborWithAttrResult) (partIdToResultMap
                      .get(partParam.getPartKey().getPartitionId()));
  
              NeighborsAttrsCompressedElement[] results = partResult.getNeighborsCompressed();
              for (int i = start; i < end; i++) {
                  nodeIdToNeighbors.put(nodeIds[i], results[i - start]);
              }
          }
  
          return new GetNeighborWithByteAttrResult(nodeIdToNeighbors);
      }
  }
  