org.apache.flink.table.runtime.match.PatternSelectFunctionRunner.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.runtime.`match`

import java.util

import org.apache.flink.api.common.functions.util.FunctionUtils
import org.apache.flink.cep.{PatternSelectFunction, RichPatternSelectFunction}
import org.apache.flink.configuration.Configuration
import org.apache.flink.table.codegen.{GeneratedClass, GeneratedPatternSelectFunction}
import org.apache.flink.table.dataformat.BaseRow
import org.apache.flink.table.dataformat.util.BaseRowUtil
import org.apache.flink.table.util.Logging

/**
  * PatternSelectFunctionRunner with [[BaseRow]] input and [[BaseRow]] output.
  */
class PatternSelectFunctionRunner(
    genFunction: GeneratedClass[_])
  extends RichPatternSelectFunction[BaseRow, BaseRow]
  with Logging {

  @transient private var function: PatternSelectFunction[BaseRow, BaseRow] = _

  override def open(parameters: Configuration): Unit = {
    LOG.debug(s"Compiling PatternSelectFunction: ${genFunction.name} \n\n" +
                s"Code:\n${genFunction.code}")
    LOG.debug("Instantiating PatternSelectFunction.")
    function = genFunction.asInstanceOf[GeneratedPatternSelectFunction]
      .newInstance(Thread.currentThread().getContextClassLoader)
    FunctionUtils.setFunctionRuntimeContext(function, getRuntimeContext)
    FunctionUtils.openFunction(function, parameters)
  }

  override def select(pattern: util.Map[String, util.List[BaseRow]]): BaseRow = {
    BaseRowUtil.setAccumulate(function.select(pattern))
  }

  override def close(): Unit = {
    FunctionUtils.closeFunction(function)
  }
}