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.node2vec.params;
  
  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.util.ArrayList;
  import java.util.List;
  
  abstract public class GetParamWithKeyIds extends GetParam {
  
    protected long[] keyIds;  // pls. make sure keyIds is sorted
  
    public GetParamWithKeyIds(int matrixId, long[] keyIds) {
      super(matrixId);
      this.keyIds = keyIds;
    }
  
    public GetParamWithKeyIds(long[] keyIds) {
      super();
      this.keyIds = keyIds;
    }
  
    @Override
    public List<PartitionGetParam> split() {
      List<PartitionKey> parts = PSAgentContext.get().getMatrixMetaManager().getPartitions(matrixId);
      int size = parts.size();
  
      List<PartitionGetParam> partParams = new ArrayList<>(size);
  
      int nodeIndex = 0;
      for (PartitionKey part : parts) {
        int start = nodeIndex;  // include start
        while (nodeIndex < keyIds.length && keyIds[nodeIndex] < part.getEndCol()) {
          nodeIndex++;
        }
        int end = nodeIndex;  // exclude end
  
        if (end - start > 0) {
          partParams.add(getPartitionParam(part, start, end));
        }
      }
  
      return partParams;
    }
  
    protected abstract PartitionGetParam getPartitionParam(PartitionKey part, int startIdx,
        int endIdx);
  }
  