org.apache.flink.table.plan.schema.StreamTableSourceTable.scala Maven / Gradle / Ivy

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/*
 * 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 KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.table.plan.schema

import org.apache.calcite.rel.`type`.{RelDataType, RelDataTypeFactory}
import org.apache.flink.table.calcite.FlinkTypeFactory
import org.apache.flink.table.plan.stats.FlinkStatistic
import org.apache.flink.table.sources.{StreamTableSource, TableSource, TableSourceUtil}

class StreamTableSourceTable[T](
    tableSource: StreamTableSource[T],
    statistic: FlinkStatistic = FlinkStatistic.UNKNOWN)
  extends TableSourceTable(
    tableSource,
    statistic) {

  TableSourceUtil.validateTableSource(tableSource)

  override def getRowType(typeFactory: RelDataTypeFactory): RelDataType = {
    TableSourceUtil.getRelDataType(
      tableSource,
      None,
      streaming = true,
      typeFactory.asInstanceOf[FlinkTypeFactory])
  }

  /**
   * replace table source with the given one, and create a new table source table.
   *
   * @param tableSource tableSource to replace.
   * @return new TableSourceTable
   */
  override def replaceTableSource(tableSource: TableSource) =
    new StreamTableSourceTable(tableSource.asInstanceOf[StreamTableSource[_]], statistic)

  /**
   * Creates a copy of this table, changing statistic.
   *
   * @param statistic A new FlinkStatistic.
   * @return Copy of this table, substituting statistic.
   */
  override def copy(statistic: FlinkStatistic) =
    new StreamTableSourceTable(tableSource.asInstanceOf[StreamTableSource[_]], statistic)
}