Package org.aksw.jena_sparql_api.algebra.transform

Class TransformOpDatasetNamesToOpGraph

java.lang.Object
org.apache.jena.sparql.algebra.TransformCopy
org.aksw.jena_sparql_api.algebra.transform.TransformOpDatasetNamesToOpGraph
All Implemented Interfaces:
org.apache.jena.sparql.algebra.Transform
public class TransformOpDatasetNamesToOpGraph extends org.apache.jena.sparql.algebra.TransformCopy
Replace GRAPH X { }. Useful for triple stores that do not support this operator. Affects mostly Virtuoso Open Source (VOS) versions. This transform should work on both triple and quad algebra forms. Transforms 
 GRAPH ?g { }
to 
 { SELECT DISTINCT ?g { GRAPH ?g { ?g_s ?g_p ?g_o } } }
 
 GRAPH :g { }
to 
 { FILTER(EXISTS GRAPH :g { ?g_s ?g_p ?g_o } }

  • Field Summary

    Fields inherited from class org.apache.jena.sparql.algebra.TransformCopy

    COPY_ALWAYS, COPY_ONLY_ON_CHANGE

  • Constructor Summary

    Constructors
    Constructor
    Description
    TransformOpDatasetNamesToOpGraph()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static org.apache.jena.sparql.algebra.Op
    transform(org.apache.jena.graph.Node node)
     
    org.apache.jena.sparql.algebra.Op
    transform(org.apache.jena.sparql.algebra.op.OpDatasetNames op)
     
    org.apache.jena.sparql.algebra.Op
    transform(org.apache.jena.sparql.algebra.op.OpGraph op, org.apache.jena.sparql.algebra.Op subOp)
     

    Methods inherited from class org.apache.jena.sparql.algebra.TransformCopy

    transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • TransformOpDatasetNamesToOpGraph

      public TransformOpDatasetNamesToOpGraph()

  • Method Details

    • transform

      public org.apache.jena.sparql.algebra.Op transform(org.apache.jena.sparql.algebra.op.OpGraph op, org.apache.jena.sparql.algebra.Op subOp)
      Specified by:
      transform in interface org.apache.jena.sparql.algebra.Transform
      Overrides:
      transform in class org.apache.jena.sparql.algebra.TransformCopy

    • transform

      public org.apache.jena.sparql.algebra.Op transform(org.apache.jena.sparql.algebra.op.OpDatasetNames op)
      Specified by:
      transform in interface org.apache.jena.sparql.algebra.Transform
      Overrides:
      transform in class org.apache.jena.sparql.algebra.TransformCopy

    • transform

      public static org.apache.jena.sparql.algebra.Op transform(org.apache.jena.graph.Node node)