Module org.apache.jena.arq
Package org.apache.jena.sparql.graph

Class GraphUnionRead

java.lang.Object
org.apache.jena.graph.impl.GraphBase
org.apache.jena.sparql.graph.GraphUnionRead
All Implemented Interfaces:
org.apache.jena.graph.Graph, org.apache.jena.graph.impl.GraphWithPerform
public class GraphUnionRead extends org.apache.jena.graph.impl.GraphBase
Immutable graph that is the view of a union of graphs in a dataset. This union can be a fixed set of graph or all named graph. This union iterates over graphs.

GraphView provides a view over a dataset and does support union graph but assumes quad access is efficient and does not end up looping.

See Also:

  • Field Summary

    Fields inherited from class org.apache.jena.graph.impl.GraphBase

    TOSTRING_TRIPLE_BASE, TOSTRING_TRIPLE_LIMIT

    Fields inherited from interface org.apache.jena.graph.Graph

    emptyGraph

  • Constructor Summary

    Constructors
    Constructor
    Description
    GraphUnionRead(DatasetGraph dsg)
    Read-only graph view of all named graphs in the dataset.
    GraphUnionRead(DatasetGraph dsg, Collection<org.apache.jena.graph.Node> graphs)
    Read-only graph view of a set of graphs from the dataset

  • Method Summary

    Modifier and Type
    Method
    Description
    org.apache.jena.graph.TransactionHandler
    getTransactionHandler()
     
    void
    performAdd(org.apache.jena.graph.Triple t)
     
    void
    performDelete(org.apache.jena.graph.Triple t)
     

    Methods inherited from class org.apache.jena.graph.impl.GraphBase

    add, clear, close, contains, contains, delete, dependsOn, find, find, forTestingOnly_graphBaseFind, getCapabilities, getEventManager, getPrefixMapping, isClosed, isEmpty, isIsomorphicWith, notifyAdd, notifyDelete, remove, size, toString, toString

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

    Methods inherited from interface org.apache.jena.graph.Graph

    add, delete, find, sizeLong, stream, stream

  • Constructor Details

    • GraphUnionRead

      public GraphUnionRead(DatasetGraph dsg)
      Read-only graph view of all named graphs in the dataset. If graphs are added after this view if created, then this is reflected in the find call.

    • GraphUnionRead

      public GraphUnionRead(DatasetGraph dsg, Collection<org.apache.jena.graph.Node> graphs)
      Read-only graph view of a set of graphs from the dataset

  • Method Details

    • getTransactionHandler

      public org.apache.jena.graph.TransactionHandler getTransactionHandler()
      Specified by:
      getTransactionHandler in interface org.apache.jena.graph.Graph
      Overrides:
      getTransactionHandler in class org.apache.jena.graph.impl.GraphBase

    • performAdd

      public void performAdd(org.apache.jena.graph.Triple t)
      Specified by:
      performAdd in interface org.apache.jena.graph.impl.GraphWithPerform
      Overrides:
      performAdd in class org.apache.jena.graph.impl.GraphBase

    • performDelete

      public void performDelete(org.apache.jena.graph.Triple t)
      Specified by:
      performDelete in interface org.apache.jena.graph.impl.GraphWithPerform
      Overrides:
      performDelete in class org.apache.jena.graph.impl.GraphBase