iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/source/AbstractDataSourceOperator.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *
 *      http://www.apache.org/licenses/LICENSE-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
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package org.apache.iotdb.db.queryengine.execution.operator.source;

import org.apache.iotdb.db.storageengine.dataregion.read.QueryDataSource;

import org.apache.tsfile.enums.TSDataType;
import org.apache.tsfile.read.common.block.TsBlockBuilder;

import java.util.List;

public abstract class AbstractDataSourceOperator extends AbstractSourceOperator
    implements DataSourceOperator {
  protected SeriesScanUtil seriesScanUtil;

  // Using for building result tsBlock
  protected TsBlockBuilder resultTsBlockBuilder;

  @Override
  public void initQueryDataSource(QueryDataSource dataSource) {
    seriesScanUtil.initQueryDataSource(dataSource);
    resultTsBlockBuilder = new TsBlockBuilder(getResultDataTypes());
  }

  @Override
  public void close() throws Exception {
    // do nothing
  }

  protected abstract List<TSDataType> getResultDataTypes();
}