70 lines
1.9 KiB
Java
70 lines
1.9 KiB
Java
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package eu.dnetlib.dhp.broker.oa.util.aggregators.withRels;
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import org.apache.commons.lang3.StringUtils;
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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 eu.dnetlib.broker.objects.OaBrokerMainEntity;
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import eu.dnetlib.dhp.broker.oa.util.BrokerConstants;
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import scala.Tuple2;
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public class RelatedDatasourceAggregator
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extends Aggregator<Tuple2<OaBrokerMainEntity, RelatedDatasource>, OaBrokerMainEntity, OaBrokerMainEntity> {
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/**
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*
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*/
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private static final long serialVersionUID = -7212121913834713672L;
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@Override
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public OaBrokerMainEntity zero() {
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return new OaBrokerMainEntity();
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}
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@Override
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public OaBrokerMainEntity finish(final OaBrokerMainEntity g) {
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return g;
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}
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@Override
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public OaBrokerMainEntity reduce(final OaBrokerMainEntity g,
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final Tuple2<OaBrokerMainEntity, RelatedDatasource> t) {
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final OaBrokerMainEntity res = StringUtils.isNotBlank(g.getOpenaireId()) ? g : t._1;
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if (t._2 != null && res.getDatasources().size() < BrokerConstants.MAX_NUMBER_OF_RELS) {
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res.getDatasources().add(t._2.getRelDatasource());
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}
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return res;
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}
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@Override
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public OaBrokerMainEntity merge(final OaBrokerMainEntity g1, final OaBrokerMainEntity g2) {
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if (StringUtils.isNotBlank(g1.getOpenaireId())) {
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final int availables = BrokerConstants.MAX_NUMBER_OF_RELS - g1.getDatasources().size();
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if (availables > 0) {
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if (g2.getDatasources().size() <= availables) {
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g1.getDatasources().addAll(g2.getDatasources());
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} else {
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g1.getDatasources().addAll(g2.getDatasources().subList(0, availables));
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}
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}
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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<OaBrokerMainEntity> bufferEncoder() {
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return Encoders.bean(OaBrokerMainEntity.class);
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}
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@Override
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public Encoder<OaBrokerMainEntity> outputEncoder() {
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return Encoders.bean(OaBrokerMainEntity.class);
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}
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}
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