com.dataartisans.flink.cascading.runtime.coGroup.regularJoin.TupleAppendOuterJoiner Maven / Gradle / Ivy
/*
* Copyright 2015 data Artisans GmbH
*
* Licensed 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 com.dataartisans.flink.cascading.runtime.coGroup.regularJoin;
import cascading.tuple.Fields;
import cascading.tuple.Tuple;
import org.apache.flink.api.common.functions.RichJoinFunction;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.Configuration;
public class TupleAppendOuterJoiner extends RichJoinFunction, Tuple, Tuple2> {
private int tupleListPos;
private int tupleListSize;
private Fields inputFields;
private Fields keyFields;
private transient Tuple2 outT;
public TupleAppendOuterJoiner(int tupleListPos, int tupleListSize, Fields inputFields, Fields keyFields) {
this.tupleListPos = tupleListPos;
this.tupleListSize = tupleListSize;
this.inputFields = inputFields;
this.keyFields = keyFields;
}
@Override
public void open(Configuration config) {
this.outT = new Tuple2<>(null, new Tuple[tupleListSize]);
}
@Override
public Tuple2 join(Tuple2 leftT, Tuple rightT) throws Exception {
if(leftT == null) {
outT.f0 = rightT.get(inputFields, keyFields);
outT.f1[tupleListPos] = rightT;
return outT;
}
else {
leftT.f1[tupleListPos] = rightT;
return leftT;
}
}
}