| /* |
| * 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.pig.backend.hadoop.executionengine.spark.converter; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import scala.collection.JavaConversions; |
| |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POUnion; |
| import org.apache.pig.backend.hadoop.executionengine.spark.SparkUtil; |
| import org.apache.pig.data.Tuple; |
| import org.apache.spark.SparkContext; |
| import org.apache.spark.rdd.RDD; |
| import org.apache.spark.rdd.UnionRDD; |
| |
| public class UnionConverter implements RDDConverter<Tuple, Tuple, POUnion> { |
| |
| private final SparkContext sc; |
| |
| public UnionConverter(SparkContext sc) { |
| this.sc = sc; |
| } |
| |
| @Override |
| public RDD<Tuple> convert(List<RDD<Tuple>> predecessors, |
| POUnion physicalOperator) throws IOException { |
| SparkUtil.assertPredecessorSizeGreaterThan(predecessors, |
| physicalOperator, 0); |
| UnionRDD<Tuple> unionRDD = new UnionRDD<Tuple>(sc, |
| JavaConversions.asScalaBuffer(predecessors), |
| SparkUtil.getManifest(Tuple.class)); |
| return unionRDD; |
| } |
| |
| } |