Package org.aksw.r2rml.jena.arq.lib

Class R2rmlLib

java.lang.Object
org.aksw.r2rml.jena.arq.lib.R2rmlLib
public class R2rmlLib extends Object
Move to a dedicated utils package?

  • Constructor Summary

    Constructors
    Constructor
    Description
    R2rmlLib()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static <T extends Collection<org.apache.jena.sparql.core.Var>>
    T
    collectReferencedColumns(T out, org.aksw.rmltk.model.backbone.common.ITermMap termMap)
    Return the set of columns (as Vars) referenced within a term map
    static <T extends org.apache.jena.rdf.model.Resource>
    T
    copyProperties(Supplier<T> targetSupplier, org.apache.jena.rdf.model.Resource source)
    Copy outgoing properties of a non-null source to a target.
    static <T extends org.apache.jena.rdf.model.Resource>
    T
    copyResource(T target, org.apache.jena.rdf.model.Resource source)
     
    static String
    createJointSqlQuery(org.aksw.rmltk.model.backbone.common.IRefObjectMap rom, Set<org.apache.jena.sparql.core.Var> childVars, Set<org.apache.jena.sparql.core.Var> parentVars, Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var> parentRemap, org.aksw.rmltk.model.backbone.r2rml.ILogicalTableR2rml childTable, org.aksw.rmltk.model.backbone.r2rml.ILogicalTableR2rml parentTable)
     
    static void
    decompose()
    Decompose triples maps such that they become triple (singular!)
    static Map<org.aksw.rmltk.model.backbone.common.IRefObjectMap,org.aksw.rmltk.model.backbone.common.ITriplesMap>
    expandRefObjectMaps(Class<? extends org.aksw.rmltk.model.backbone.common.ITriplesMap> triplesMapClass, org.apache.jena.rdf.model.Model outModel, org.aksw.rmltk.model.backbone.common.ITriplesMap tm, org.aksw.commons.sql.codec.api.SqlCodec sqlCodec)
    Create a new triples map where any ref object map has been turned into a new TriplesMap whose logical table is an SQL query string with the appropriate join.
    static Map<org.aksw.rmltk.model.backbone.common.IRefObjectMap,org.aksw.rmltk.model.backbone.common.ITriplesMap>
    expandRefObjectMapsInPlace(Class<? extends org.aksw.rmltk.model.backbone.common.ITriplesMap> triplesMapClass, org.aksw.rmltk.model.backbone.common.ITriplesMap triplesMap, org.aksw.commons.sql.codec.api.SqlCodec sqlCodec)
    Create a new TriplesMap for each RefObjectMap.
    static void
    expandShortcuts(org.aksw.rmltk.model.backbone.common.ITriplesMap tm)
    Expands rr:class, rr:subject, rr:predicate, rr:object and rr:graph to term maps in order to allow for uniform processing
    static void
    renameVariables(org.aksw.rmltk.model.backbone.common.ITermMap termMap, org.apache.jena.sparql.graph.NodeTransform nodeTransform)
     
    static Stream<org.aksw.rmltk.model.r2rml.TriplesMap>
    streamTriplesMaps(org.apache.jena.rdf.model.Model model)
    Stream all TriplesMaps in a model (based on the rr:logicalTable predicate)
    static String
    toSqlString(org.aksw.rmltk.model.backbone.r2rml.ILogicalTableR2rml logicalTable)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • R2rmlLib

      public R2rmlLib()

  • Method Details

    • streamTriplesMaps

      public static Stream<org.aksw.rmltk.model.r2rml.TriplesMap> streamTriplesMaps(org.apache.jena.rdf.model.Model model)
      Stream all TriplesMaps in a model (based on the rr:logicalTable predicate)

    • expandRefObjectMapsInPlace

      public static Map<org.aksw.rmltk.model.backbone.common.IRefObjectMap,org.aksw.rmltk.model.backbone.common.ITriplesMap> expandRefObjectMapsInPlace(Class<? extends org.aksw.rmltk.model.backbone.common.ITriplesMap> triplesMapClass, org.aksw.rmltk.model.backbone.common.ITriplesMap triplesMap, org.aksw.commons.sql.codec.api.SqlCodec sqlCodec)
      Create a new TriplesMap for each RefObjectMap. The new TriplesMap will have a generated SQL query string that performs the appropriate join.

    • expandRefObjectMaps

      public static Map<org.aksw.rmltk.model.backbone.common.IRefObjectMap,org.aksw.rmltk.model.backbone.common.ITriplesMap> expandRefObjectMaps(Class<? extends org.aksw.rmltk.model.backbone.common.ITriplesMap> triplesMapClass, org.apache.jena.rdf.model.Model outModel, org.aksw.rmltk.model.backbone.common.ITriplesMap tm, org.aksw.commons.sql.codec.api.SqlCodec sqlCodec)
      Create a new triples map where any ref object map has been turned into a new TriplesMap whose logical table is an SQL query string with the appropriate join.
      Parameters:
      The - model into which to append the expanded TriplesMaps
      The - TriplesMaps whose RefObjectMaps to expand
      SqlCodec - sqlCodec for encoding/decoding column names
      Returns:
      A map from any encountered RefObjectMap (in the given TriplesMap) to the TriplesMap it was expanded to.

    • collectReferencedColumns

      public static <T extends Collection<org.apache.jena.sparql.core.Var>> T collectReferencedColumns(T out, org.aksw.rmltk.model.backbone.common.ITermMap termMap)
      Return the set of columns (as Vars) referenced within a term map

    • renameVariables

      public static void renameVariables(org.aksw.rmltk.model.backbone.common.ITermMap termMap, org.apache.jena.sparql.graph.NodeTransform nodeTransform)

    • decompose

      public static void decompose()
      Decompose triples maps such that they become triple (singular!) maps: I.e. one triple maps for every triple that gets generated or in other words just one subjectMap, one predicteObjectMap, one predicateMap and one objectMap

    • createJointSqlQuery

      public static String createJointSqlQuery(org.aksw.rmltk.model.backbone.common.IRefObjectMap rom, Set<org.apache.jena.sparql.core.Var> childVars, Set<org.apache.jena.sparql.core.Var> parentVars, Map<org.apache.jena.sparql.core.Var,org.apache.jena.sparql.core.Var> parentRemap, org.aksw.rmltk.model.backbone.r2rml.ILogicalTableR2rml childTable, org.aksw.rmltk.model.backbone.r2rml.ILogicalTableR2rml parentTable)

    • toSqlString

      public static String toSqlString(org.aksw.rmltk.model.backbone.r2rml.ILogicalTableR2rml logicalTable)

    • copyProperties

      public static <T extends org.apache.jena.rdf.model.Resource> T copyProperties(Supplier<T> targetSupplier, org.apache.jena.rdf.model.Resource source)
      Copy outgoing properties of a non-null source to a target. Used to copy term maps

    • copyResource

      public static <T extends org.apache.jena.rdf.model.Resource> T copyResource(T target, org.apache.jena.rdf.model.Resource source)

    • expandShortcuts

      public static void expandShortcuts(org.aksw.rmltk.model.backbone.common.ITriplesMap tm)
      Expands rr:class, rr:subject, rr:predicate, rr:object and rr:graph to term maps in order to allow for uniform processing
      Parameters:
      tm - The triple map for which to expand all mentioned short cuts