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.sona.psf.embedding.line;
  
  import com.tencent.angel.PartitionKey;
  import com.tencent.angel.ml.matrix.psf.get.base.GetParam;
  import com.tencent.angel.ml.matrix.psf.get.base.PartitionGetParam;
  import com.tencent.angel.psagent.PSAgentContext;
  
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.List;
  
  public class DotParam extends GetParam {
  
    private byte[] dataBuf;
    private int bufLength;
  
    public DotParam(int matrixId,
                    int seed,
                    int partitionId,
                    int[] src,
                    int[] dst) {
      super(matrixId);
      this.bufLength = 12 + src.length * 8;
      this.dataBuf = new byte[bufLength];
      ByteBuffer wrapper = ByteBuffer.wrap(this.dataBuf);
      wrapper.putInt(seed);
      wrapper.putInt(partitionId);
      wrapper.putInt(src.length);
      for (int a = 0; a < src.length; a++) {
        wrapper.putInt(src[a]);
        wrapper.putInt(dst[a]);
      }
    }
  
    @Override
    public List<PartitionGetParam> split() {
      List<PartitionKey> pkeys = PSAgentContext.get().getMatrixMetaManager().getPartitions(matrixId);
      List<PartitionGetParam> params = new ArrayList<>();
      for (PartitionKey pkey: pkeys) {
        params.add(new DotPartitionParam(matrixId, pkey, dataBuf, bufLength));
      }
      return params;
    }
  }
  