Package org.aksw.jenax.facete.treequery2.api

Interface RelationQuery

All Superinterfaces:
HasSlice
All Known Implementing Classes:
RelationQueryImpl
public interface RelationQuery extends HasSlice

  • Method Details

    • getScopeBaseName

      String getScopeBaseName()
      A name to use for prefixing variables of this node's relation

    • getParentNode

      NodeQuery getParentNode()
      Returns the parent relation and a variable of it to which this relation connects. Returns null if there is no parent

    • getReachingStep

      org.aksw.jenax.path.core.FacetStep getReachingStep()
      The step by which this relation was reached from the parent node (null if there is no parent)

    • root

      default RelationQuery root()
      Get the parent relation of this instance

    • getSortConditions

      List<org.apache.jena.query.SortCondition> getSortConditions()

    • getRelation

      Fragment getRelation()
      Returns the relation on which this RelationQuery is based.

    • getContext

      QueryContext getContext()
      The context of this query which for example holds the PropertyResolver for mapping properties to graph patterns.

    • partition

      Partition partition()
      Return this relation's partitioning, null if not partitioned.

    • getFacetConstraints

      FacetConstraints<ConstraintNode<NodeQuery>> getFacetConstraints()
      Get the constraints that were placed on this relation

    • partitionBy

      void partitionBy(NodeQueryOld... paths)
      Declare this relation to be partitioned by the given paths.

    • asNode

      NodeQueryOld asNode()
      Each row of a relation can be viewed as a node that has the column values as properties

    • getPath

      org.aksw.jenax.path.core.FacetPath getPath()
      Return the facet path. By convention, a facet step with the targetComponent set to null refers to a relation. The 'targetComponent' field is null for all steps

    • roots

      List<NodeQuery> roots()
      Return each of the relation's columns as a QueryNode.

    • source

      NodeQuery source()

    • target

      NodeQuery target()

    • predicate

      NodeQuery predicate()

    • nodeFor

      NodeQuery nodeFor(org.apache.jena.sparql.core.Var var)
      Obtain a NodeQuery for one of the variables of the relation returned by getRelation().

    • of

      static RelationQuery of(org.apache.jena.sparql.core.Var startVar)
      Create a new relation query with an empty graph pattern. Further elements connect to the given startVar.

    • of

      static RelationQuery of(Fragment relation)

    • of

      static RelationQuery of(Supplier<Fragment> relation)

    • of

      static RelationQuery of(Supplier<Fragment> relation, QueryContext queryContext)

    • doSort

      static void doSort(RelationQuery relationQuery, org.apache.jena.sparql.expr.Expr expr, int sortDirection)

    • getSortDirection

      static int getSortDirection(RelationQuery relationQuery, org.apache.jena.sparql.expr.Expr expr)