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.kcore.readTag;
  
  import com.tencent.angel.common.collections.DynamicLongArray;
  import com.tencent.angel.graph.utils.GraphMatrixUtils;
  import com.tencent.angel.ml.matrix.psf.get.base.*;
  import com.tencent.angel.ps.storage.vector.ServerLongIntRow;
  import com.tencent.angel.psagent.matrix.transport.router.KeyPart;
  import com.tencent.angel.psagent.matrix.transport.router.operator.ILongKeyPartOp;
  
  import java.util.List;
  
  public class ReadTag extends GetFunc {
  
      public ReadTag(int matrixId, long[] nodes, int rowId) {
          this(new ReadTagParam(matrixId, nodes, rowId));
      }
  
      public ReadTag(ReadTagParam param) {
          super(param);
      }
  
      public ReadTag() {
          this(null);
      }
  
      @Override
      public PartitionGetResult partitionGet(PartitionGetParam partParam) {
          GeneralPartGetParam param = (GeneralPartGetParam) partParam;
          KeyPart keyPart = param.getIndicesPart();
          long[] nodeIds = ((ILongKeyPartOp) keyPart).getKeys();
          ServerLongIntRow row = GraphMatrixUtils.getPSLongKeyIntRow(psContext, param, param.getRowId());
  
          DynamicLongArray nodes = new DynamicLongArray(nodeIds.length);
          for (int i = 0; i < nodeIds.length; i++) {
              long nodeId = nodeIds[i];
              if (row.get(nodeId) > 0) {
                  nodes.add(nodeId);
              }
          }
          return new PartReadTagResult(nodes.getData());
      }
  
      @Override
      public GetResult merge(List<PartitionGetResult> partResults) {
          DynamicLongArray re = new DynamicLongArray(0);
          for (PartitionGetResult result: partResults) {
              PartReadTagResult partResult = (PartReadTagResult) result;
              long[] nodeIds = partResult.getNodes();
              for (long id: nodeIds) {
                  re.add(id);
              }
          }
          return new ReadTagResult(re.getData());
      }
  }
  