forked from D-Net/dnet-hadoop
69 lines
1.8 KiB
Java
69 lines
1.8 KiB
Java
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package eu.dnetlib.dhp.broker.oa.util.aggregators.withRels;
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import org.apache.spark.sql.Encoder;
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import org.apache.spark.sql.Encoders;
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import org.apache.spark.sql.expressions.Aggregator;
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import scala.Tuple2;
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public class ResultWithRelationsAggregator<T>
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extends Aggregator<Tuple2<ResultWithRelations, T>, ResultWithRelations, ResultWithRelations> {
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/**
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*
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*/
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private static final long serialVersionUID = -3687878788861013488L;
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@Override
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public ResultWithRelations zero() {
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return new ResultWithRelations();
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}
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@Override
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public ResultWithRelations finish(final ResultWithRelations g) {
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return g;
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}
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@Override
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public ResultWithRelations reduce(final ResultWithRelations g, final Tuple2<ResultWithRelations, T> t) {
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if (g.getResult() == null) {
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return t._1;
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} else if (t._2 instanceof RelatedSoftware) {
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g.getSoftwares().add((RelatedSoftware) t._2);
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} else if (t._2 instanceof RelatedDataset) {
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g.getDatasets().add((RelatedDataset) t._2);
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} else if (t._2 instanceof RelatedPublication) {
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g.getPublications().add((RelatedPublication) t._2);
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} else if (t._2 instanceof RelatedProject) {
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g.getProjects().add((RelatedProject) t._2);
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}
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return g;
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}
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@Override
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public ResultWithRelations merge(final ResultWithRelations g1, final ResultWithRelations g2) {
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if (g1.getResult() != null) {
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g1.getSoftwares().addAll(g2.getSoftwares());
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g1.getDatasets().addAll(g2.getDatasets());
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g1.getPublications().addAll(g2.getPublications());
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g1.getProjects().addAll(g2.getProjects());
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return g1;
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} else {
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return g2;
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}
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}
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@Override
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public Encoder<ResultWithRelations> bufferEncoder() {
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return Encoders.kryo(ResultWithRelations.class);
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}
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@Override
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public Encoder<ResultWithRelations> outputEncoder() {
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return Encoders.kryo(ResultWithRelations.class);
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}
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}
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