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.ml.lda.psf;
  
  import com.tencent.angel.PartitionKey;
  import com.tencent.angel.ml.matrix.psf.get.base.*;
  import com.tencent.angel.ml.matrix.psf.get.getrows.PartitionGetRowsParam;
  import com.tencent.angel.ps.storage.MatrixStorageManager;
  import com.tencent.angel.ps.storage.vector.ServerRow;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  import java.util.ArrayList;
  import java.util.List;
  
  
  public class GetPartFunc extends GetFunc {
  
    private final static Log LOG = LogFactory.getLog(GetPartFunc.class);
  
    public GetPartFunc(GetParam param) {
      super(param);
    }
  
    public GetPartFunc() {
      super(null);
    }
  
    @Override public PartitionGetResult partitionGet(PartitionGetParam partParam) {
      if (partParam instanceof PartitionGetRowsParam) {
        PartitionGetRowsParam param = (PartitionGetRowsParam) partParam;
  
        PartitionKey pkey = param.getPartKey();
        pkey = psContext.getMatrixMetaManager().getMatrixMeta(pkey.getMatrixId())
          .getPartitionMeta(pkey.getPartitionId()).getPartitionKey();
        int ws = pkey.getStartRow();
        int es = pkey.getEndRow();
  
        List<Integer> reqRows = param.getRowIndexes();
  
        MatrixStorageManager manager = psContext.getMatrixStorageManager();
        List<ServerRow> rows = new ArrayList<>();
        for (int w : reqRows)
          rows.add(manager.getRow(pkey, w));
  
        PartCSRResult csr = new PartCSRResult(rows);
        return csr;
      } else {
        return null;
      }
    }
  
    @Override public GetResult merge(List<PartitionGetResult> partResults) {
      return null;
    }
  }