org.apache.flink.table.planner.codegen.calls.CallGenerator.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.planner.codegen.calls

import org.apache.flink.table.planner.codegen.{CodeGeneratorContext, GeneratedExpression}
import org.apache.flink.table.types.logical.LogicalType

/**
  * Generator to generate a call expression. It is usually used when the generation
  * depends on some other parameters or the generation is too complex to be a util method.
  */
trait CallGenerator {

  def generate(
    ctx: CodeGeneratorContext,
    operands: Seq[GeneratedExpression],
    returnType: LogicalType): GeneratedExpression

}