fr.inria.oak.paxquery.pact.operators.binary.ConjLNOEquiJoinWithAggregationOperator.java Source code

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Here is the source code for fr.inria.oak.paxquery.pact.operators.binary.ConjLNOEquiJoinWithAggregationOperator.java

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/*******************************************************************************
 * Copyright (C) 2013, 2014, 2015 by Inria and Paris-Sud University
 * 
 * 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 fr.inria.oak.paxquery.pact.operators.binary;

import java.util.Iterator;

import javax.xml.bind.DatatypeConverter;

import org.apache.commons.lang.SerializationUtils;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.types.Record;
import org.apache.flink.util.Collector;

import fr.inria.oak.paxquery.common.aggregation.AggregationType;
import fr.inria.oak.paxquery.common.datamodel.metadata.NestedMetadata;
import fr.inria.oak.paxquery.pact.configuration.PACTOperatorsConfiguration;

/**
 * Conjunctive left nested outer equi-join operator in PACT, plus aggregation on a field
 * of the nested record. The operator may project the right nested field.
 * 
 */
public class ConjLNOEquiJoinWithAggregationOperator extends ConjLNOEquiJoinOperator {

    private int aggregationColumn;

    private AggregationType aggregationType;

    private boolean excludeNestedField;

    @Override
    public void open(Configuration parameters) throws Exception {
        super.open(parameters);

        this.aggregationColumn = parameters.getInteger(PACTOperatorsConfiguration.AGGREGATION_COLUMN_INT.toString(),
                -1);

        String aggregationTypeEncoded = parameters
                .getString(PACTOperatorsConfiguration.AGGREGATION_TYPE_BINARY.toString(), null);
        byte[] aggregationTypeBytes = DatatypeConverter.parseBase64Binary(aggregationTypeEncoded);
        final AggregationType aggregationType = (AggregationType) SerializationUtils
                .deserialize(aggregationTypeBytes);
        this.aggregationType = aggregationType;

        this.excludeNestedField = parameters
                .getBoolean(PACTOperatorsConfiguration.EXCLUDE_NESTED_FIELD_BOOLEAN.toString(), false);
    }

    @Override
    public void coGroup(Iterator<Record> records1, Iterator<Record> records2, Collector<Record> collector) {
        conjLNOEquiJoinWithAggregation(this.inputRecordsSignature1, records1, this.inputRecordsSignature2, records2,
                this.nullRecord, this.aggregationColumn, this.aggregationType, this.excludeNestedField, collector);
    }

    /**
     * 
     * @param inputRecordsSignature1
     * @param records1
     * @param inputRecordsSignature2
     * @param records2
     * @param outer
     * @param aggregationColumn
     * @param aggregationType
     * @param collector
     */
    public static void conjLNOEquiJoinWithAggregation(NestedMetadata inputRecordsSignature1,
            Iterator<Record> records1, NestedMetadata inputRecordsSignature2, Iterator<Record> records2,
            Record nullRecord, int aggregationColumn, AggregationType aggregationType, boolean excludeNestedField,
            Collector<Record> collector) {
        coGroupNestedJoin(inputRecordsSignature1, records1, inputRecordsSignature2, records2, null, 0, true,
                nullRecord, false, aggregationColumn, aggregationType, excludeNestedField, collector);
    }

}