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.ml.matrix.psf.update.base.PartitionUpdateParam;
  import com.tencent.angel.ml.matrix.psf.update.base.UpdateFunc;
  import com.tencent.angel.ml.matrix.psf.update.base.UpdateParam;
  import com.tencent.angel.ps.storage.partition.RowBasedPartition;
  import com.tencent.angel.ps.storage.vector.ServerIntIntRow;
  import com.tencent.angel.ps.storage.vector.ServerRow;
  
  public class ResetFunc extends UpdateFunc {
  
    public ResetFunc(UpdateParam param) {
      super(param);
    }
  
    public ResetFunc() {
      super(null);
    }
  
    @Override public void partitionUpdate(PartitionUpdateParam partParam) {
      RowBasedPartition part = (RowBasedPartition)psContext.getMatrixStorageManager()
        .getPart(partParam.getMatrixId(), partParam.getPartKey().getPartitionId());
  
      if (part != null) {
        int startRow = part.getPartitionKey().getStartRow();
        int endRow = part.getPartitionKey().getEndRow();
        for (int i = startRow; i < endRow; i++) {
          ServerRow row = part.getRow(i);
          if (row == null) {
            continue;
          }
  
          row.reset();
  //        reset(row);
        }
      }
    }
  
    private void reset(ServerRow row) {
      switch (row.getRowType()) {
        case T_INT_SPARSE:
        case T_INT_DENSE:
          reset((ServerIntIntRow) row);
  
        default:
          break;
      }
    }
  
    private void reset(ServerIntIntRow row) {
      try {
        row.startWrite();
        row.reset();
      } finally {
        row.endWrite();
      }
    }
  }
  