/*
* 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.streaming.api.operators;
import org.apache.flink.annotation.PublicEvolving;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.typeinfo.TypeInformation;
/**
* Stream operators can implement this interface if they need access to the output type information
* at {@link org.apache.flink.streaming.api.graph.StreamGraph} generation. This can be useful for
* cases where the output type is specified by the returns method and, thus, after the stream
* operator has been created.
*/
@PublicEvolving
public interface OutputTypeConfigurable<OUT> {
/**
* Is called by the {@link org.apache.flink.streaming.api.graph.StreamGraph#addOperator(Integer, String, StreamOperator, TypeInformation, TypeInformation, String)}
* method when the {@link org.apache.flink.streaming.api.graph.StreamGraph} is generated. The
* method is called with the output {@link TypeInformation} which is also used for the
* {@link org.apache.flink.streaming.runtime.tasks.StreamTask} output serializer.
*
* @param outTypeInfo Output type information of the {@link org.apache.flink.streaming.runtime.tasks.StreamTask}
* @param executionConfig Execution configuration
*/
void setOutputType(TypeInformation<OUT> outTypeInfo, ExecutionConfig executionConfig);
}