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More consolidation of the r2rml/virtual knowledge graph subsystem (sp…
…arqlify / ontop)
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32 changes: 4 additions & 28 deletions
32
...n/src/main/scala/net/sansa_stack/rdf/common/partition/core/RdfPartitionImportExport.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,46 +1,22 @@ | ||
| package net.sansa_stack.rdf.common.partition.core | ||
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| import org.aksw.r2rml.jena.arq.lib.R2rmlLib | ||
| import org.aksw.r2rml.jena.domain.api.TriplesMap | ||
| import org.aksw.r2rml.jena.vocab.RR | ||
| import org.apache.jena.rdf.model.{Model, ModelFactory} | ||
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| import net.sansa_stack.rdf.common.partition.r2rml.R2rmlUtils | ||
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| import scala.collection.JavaConverters._ | ||
| import org.apache.jena.rdf.model.Model | ||
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| /** | ||
| * @author Lorenz Buehmann | ||
| */ | ||
| object RdfPartitionImportExport { | ||
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| /** | ||
| * Exports the RDF partition states as R2RML. | ||
| * | ||
| * @param partitioner the RDF partitioner | ||
| * @param partitions the RDF partition states | ||
| * @param explodeLanguageTags if `true` a separate mapping/TriplesMap will be created for each language tag, | ||
| * otherwise a mapping to a column for the language tag represented by | ||
| * `rr:langColumn` property will be used (note, this is an extension of R2RML) | ||
| * @return the model containing the RDF partition states as as R2RML syntax | ||
| */ | ||
| def exportAsR2RML(partitioner: RdfPartitioner[RdfPartitionStateDefault], | ||
| partitions: Seq[RdfPartitionStateDefault], | ||
| explodeLanguageTags: Boolean = false): Model = { | ||
| // put all triple maps into a single model | ||
| val model = ModelFactory.createDefaultModel() | ||
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| R2rmlUtils.createR2rmlMappings(partitioner, partitions, model, explodeLanguageTags) | ||
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| model | ||
| } | ||
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| /** | ||
| * Imports the RDF partition states as `TriplesMap` from the given RDF data model. | ||
| * | ||
| * @param model the model | ||
| * @return the RDF partition states as `TriplesMap` | ||
| */ | ||
| def importFromR2RML(model: Model): Seq[TriplesMap] = { | ||
| model.listResourcesWithProperty(RR.logicalTable).mapWith(_.as(classOf[TriplesMap])).asScala.toSeq | ||
| import collection.JavaConverters._ | ||
| R2rmlLib.streamTriplesMaps(model).iterator().asScala.toSeq | ||
| } | ||
| } |
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41 changes: 41 additions & 0 deletions
41
sansa-rdf/sansa-rdf-spark/src/main/scala/net/sansa_stack/rdf/spark/utils/PartitionLib.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| package net.sansa_stack.rdf.spark.utils | ||
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| import net.sansa_stack.rdf.common.partition.core.{RdfPartitionStateDefault, RdfPartitioner} | ||
| import net.sansa_stack.rdf.common.partition.r2rml.R2rmlUtils | ||
| import net.sansa_stack.rdf.spark.partition.core.{BlankNodeStrategy, SQLUtils} | ||
| import org.aksw.sparqlify.core.sql.common.serialization.SqlEscaperBacktick | ||
| import org.apache.jena.rdf.model.{Model, ModelFactory} | ||
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| /** | ||
| * @author Lorenz Buehmann | ||
| */ | ||
| object PartitionLib { | ||
| /** | ||
| * Exports the RDF partition states as R2RML. | ||
| * Uses table name and sql escaping configuration suitable for spark. | ||
| * | ||
| * @param partitioner the RDF partitioner | ||
| * @param partitions the RDF partition states | ||
| * @param explodeLanguageTags if `true` a separate mapping/TriplesMap will be created for each language tag, | ||
| * otherwise a mapping to a column for the language tag represented by | ||
| * `rr:langColumn` property will be used (note, this is an extension of R2RML) | ||
| * @return the model containing the RDF partition states as as R2RML syntax | ||
| */ | ||
| def exportAsR2RML(partitioner: RdfPartitioner[RdfPartitionStateDefault], | ||
| partitions: Seq[RdfPartitionStateDefault], | ||
| explodeLanguageTags: Boolean = false): Model = { | ||
| // put all triple maps into a single model | ||
| val model = ModelFactory.createDefaultModel() | ||
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| partitions.flatMap(partition => | ||
| R2rmlUtils.createR2rmlMappings( | ||
| partitioner, | ||
| partition, | ||
| p => SQLUtils.createTableName(p, BlankNodeStrategy.Table), | ||
| new SqlEscaperBacktick, | ||
| model, explodeLanguageTags) | ||
| ) | ||
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| model | ||
| } | ||
| } |