Package org.apache.jena.sparql.core.mem

Interface QuadTable

All Superinterfaces:

TransactionalComponent, TupleTable<Quad>

All Known Implementing Classes:

HexTable, PMapQuadTable

public interface QuadTable
extends TupleTable<Quad>

A simplex or multiplex table of Quads. Implementations may wish to override listGraphNodes() with a more efficient implementation.

Method Summary

Modifier and Type	Method	Description
default void	clear()	Clear all tuples from this table.
java.util.stream.Stream<Quad>	find(Node g, Node s, Node p, Node o)	Search the table using a pattern of slots.
default java.util.stream.Stream<Quad>	findInUnionGraph(Node s, Node p, Node o)
default java.util.stream.Stream<Node>	listGraphNodes()	Discover the graphs named in the table

Methods inherited from interface org.apache.jena.sparql.core.mem.TransactionalComponent

begin, commit, end

Methods inherited from interface org.apache.jena.sparql.core.mem.TupleTable

abort, add, delete

Method Detail

find

java.util.stream.Stream<Quad> find(Node g,
                                   Node s,
                                   Node p,
                                   Node o)

Search the table using a pattern of slots. Node.ANY or null will work as a wildcard.

Parameters:

g - the graph node of the pattern

s - the subject node of the pattern

p - the predicate node of the pattern

o - the object node of the pattern

Returns:

an Stream of matched quads

listGraphNodes

default java.util.stream.Stream<Node> listGraphNodes()

Discover the graphs named in the table

Returns:

an Stream of graph names used in this table

clear

default void clear()

Description copied from interface: TupleTable

Clear all tuples from this table.

Specified by:

clear in interface TupleTable<Quad>

findInUnionGraph

default java.util.stream.Stream<Quad> findInUnionGraph(Node s,
                                                       Node p,
                                                       Node o)