forked from D-Net/dnet-hadoop
specified column used to perform the join operation in the javadoc
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@ -46,7 +46,7 @@ import static eu.dnetlib.dhp.graph.utils.GraphMappingUtils.asRelatedEntity;
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* 3) we only need a subset of fields from the related entities, so we introduce a distinction between E_source = S
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* and E_target = T. Objects in T are heavily pruned by all the unnecessary information
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*
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* 4) perform the join as (((T join R) union S) groupby S.id) yield S -> [ <T, R> ]
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* 4) perform the join as (((T.id join R.target) union S) groupby S.id) yield S -> [ <T, R> ]
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*/
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public class GraphJoiner implements Serializable {
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