org.apache.flink.table.sinks.TableSinkBase.scala Maven / Gradle / Ivy
/*
* 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.sinks
import org.apache.flink.table.api.Table
import org.apache.flink.table.types.{DataType, InternalType}
trait TableSinkBase[T] extends TableSink[T] {
private var fieldNames: Option[Array[String]] = None
private var fieldTypes: Option[Array[DataType]] = None
/** Return a deep copy of the [[TableSink]]. */
protected def copy: TableSinkBase[T]
/**
* Return the field names of the [[Table]] to emit. */
def getFieldNames: Array[String] = {
fieldNames match {
case Some(n) => n
case None => throw new IllegalStateException(
"TableSink must be configured to retrieve field names.")
}
}
/** Return the field types of the [[Table]] to emit. */
def getFieldTypes: Array[DataType] = {
fieldTypes match {
case Some(t) => t
case None => throw new IllegalStateException(
"TableSink must be configured to retrieve field types.")
}
}
def getFieldInternalTypes: Array[InternalType] = {
getFieldTypes.map(_.toInternalType)
}
/**
* Return a copy of this [[TableSink]] configured with the field names and types of the
* [[Table]] to emit.
*
* @param fieldNames The field names of the table to emit.
* @param fieldTypes The field types of the table to emit.
* @return A copy of this [[TableSink]] configured with the field names and types of the
* [[Table]] to emit.
*/
final def configure(fieldNames: Array[String],
fieldTypes: Array[DataType]): TableSink[T] = {
val configuredSink = this.copy
configuredSink.fieldNames = Some(fieldNames)
configuredSink.fieldTypes = Some(fieldTypes)
configuredSink
}
}