/*
* 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.storm.util;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.datastream.SplitStream;
/**
* Strips {@link SplitStreamType}{@code <T>} away, ie, extracts the wrapped record of type {@code T}. Can be used to get
* a "clean" stream from a Spout/Bolt that declared multiple output streams (after the streams got separated using
* {@link DataStream#split(org.apache.flink.streaming.api.collector.selector.OutputSelector) .split(...)} and
* {@link SplitStream#select(String...) .select(...)}).
*
* @param <T>
*/
public class SplitStreamMapper<T> implements MapFunction<SplitStreamType<T>, T> {
private static final long serialVersionUID = 3550359150160908564L;
@Override
public T map(SplitStreamType<T> value) throws Exception {
return value.value;
}
}