| /* |
| * 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.Serializable; |
| import java.util.List; |
| |
| import scala.runtime.AbstractFunction1; |
| |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.POStatus; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.Result; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POFilter; |
| import org.apache.pig.backend.hadoop.executionengine.spark.SparkUtil; |
| import org.apache.pig.data.Tuple; |
| import org.apache.spark.rdd.RDD; |
| |
| /** |
| * Converter that converts an RDD to a filtered RRD using POFilter |
| */ |
| @SuppressWarnings({ "serial" }) |
| public class FilterConverter implements RDDConverter<Tuple, Tuple, POFilter> { |
| |
| @Override |
| public RDD<Tuple> convert(List<RDD<Tuple>> predecessors, |
| POFilter physicalOperator) { |
| SparkUtil.assertPredecessorSize(predecessors, physicalOperator, 1); |
| RDD<Tuple> rdd = predecessors.get(0); |
| FilterFunction filterFunction = new FilterFunction(physicalOperator); |
| return rdd.filter(filterFunction); |
| } |
| |
| private static class FilterFunction extends |
| AbstractFunction1<Tuple, Object> implements Serializable { |
| |
| private POFilter poFilter; |
| |
| private FilterFunction(POFilter poFilter) { |
| this.poFilter = poFilter; |
| } |
| |
| @Override |
| public Boolean apply(Tuple v1) { |
| Result result; |
| try { |
| poFilter.setInputs(null); |
| poFilter.attachInput(v1); |
| result = poFilter.getNextTuple(); |
| } catch (ExecException e) { |
| throw new RuntimeException("Couldn't filter tuple", e); |
| } |
| |
| if (result == null) { |
| return false; |
| } |
| |
| switch (result.returnStatus) { |
| case POStatus.STATUS_OK: |
| return true; |
| case POStatus.STATUS_EOP: // TODO: probably also ok for EOS, |
| // END_OF_BATCH |
| return false; |
| default: |
| throw new RuntimeException( |
| "Unexpected response code from filter: " + result); |
| } |
| } |
| } |
| } |