/*
* 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.api.java.operators.translation;
import org.apache.flink.annotation.Internal;
import org.apache.flink.api.java.tuple.Tuple3;
import org.apache.flink.util.Collector;
/**
* Needed to wrap tuples to {@code Tuple3<groupKey, sortKey, value>} for combine method of group reduce with key selector sorting
*/
@Internal
public class Tuple3WrappingCollector<IN, K1, K2> implements Collector<IN>, java.io.Serializable {
private static final long serialVersionUID = 1L;
private final Tuple3UnwrappingIterator<IN, K1, K2> tui;
private final Tuple3<K1, K2, IN> outTuple;
private Collector<Tuple3<K1, K2, IN>> wrappedCollector;
public Tuple3WrappingCollector(Tuple3UnwrappingIterator<IN, K1, K2> tui) {
this.tui = tui;
this.outTuple = new Tuple3<K1, K2, IN>();
}
public void set(Collector<Tuple3<K1, K2, IN>> wrappedCollector) {
this.wrappedCollector = wrappedCollector;
}
@Override
public void close() {
this.wrappedCollector.close();
}
@Override
public void collect(IN record) {
this.outTuple.f0 = this.tui.getLastGroupKey();
this.outTuple.f1 = this.tui.getLastSortKey();
this.outTuple.f2 = record;
this.wrappedCollector.collect(outTuple);
}
}