fr.inria.oak.paxquery.pact.operators.unary.PostLNOJoinWithAggregationOperator.java Source code

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Here is the source code for fr.inria.oak.paxquery.pact.operators.unary.PostLNOJoinWithAggregationOperator.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.unary;

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;

/**
 * Post-processing left nested outer join operator in PACT, with aggregation.
 * 
 */
public class PostLNOJoinWithAggregationOperator extends PostLNOJoinOperator {

    private int combinationColumn;

    private AggregationType aggregationType;

    private boolean excludeNestedField;

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

        this.combinationColumn = parameters.getInteger(PACTOperatorsConfiguration.COMBINATION_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 reduce(Iterator<Record> records, Collector<Record> collector) {
        postLNOJoinWithAggregation(this.inputRecordsSignature, records, this.nestedRecordsColumn,
                this.evaluationColumn, this.combinationColumn, this.aggregationType, this.excludeNestedField,
                collector);
    }

    /**
     * 
     * @param inputRecordsSignature
     * @param records
     * @param outer
     * @param nested
     * @param recordIdentifierColumn
     * @param nestedRecordsColumn
     * @param evaluationColumn
     * @param aggregationColumn
     * @param aggregationType
     * @param collector
     */
    public static void postLNOJoinWithAggregation(NestedMetadata inputRecordsSignature, Iterator<Record> records,
            int nestedRecordsColumn, int evaluationColumn, int combinationColumn, AggregationType aggregationType,
            boolean excludeNestedField, Collector<Record> collector) {
        postJoin(inputRecordsSignature, records, true, true, nestedRecordsColumn, evaluationColumn,
                combinationColumn, aggregationType, excludeNestedField, collector);
    }

}