org.apache.jena.sparql.core.mem

Class HexTable

java.lang.Object

org.apache.jena.sparql.core.mem.HexTable

All Implemented Interfaces:

QuadTable, TransactionalComponent, TupleTable<Quad>

public class HexTable
extends Object
implements QuadTable

A six-way QuadTable using all of the available forms in QuadTableForm. This class binds together all of the enumerated values in enum QuadTableForm, each of which implements QuadTable, into one implementation of QuadTable that selects the most useful index form(s) for any given operation.

Constructor Summary

Constructors

Constructor and Description
HexTable()

Method Summary

Modifier and Type	Method and Description
void	add(Quad q) Add a tuple to the table
void	begin(ReadWrite rw) Start either a READ or WRITE transaction
void	clear() Clear all tuples from this table.
void	commit() Commit a transaction - finish the transaction and make any changes permanent (if a "write" transaction)
void	delete(Quad q) Remove a tuple from the table
void	end() Finish the transaction - if a write transaction and commit() has not been called, then abort
java.util.stream.Stream<Quad>	find(Node g, Node s, Node p, Node o) Search the table using a pattern of slots.
java.util.stream.Stream<Quad>	findInUnionGraph(Node s, Node p, Node o)
java.util.stream.Stream<Node>	listGraphNodes() Discover the graphs named in the table

Methods inherited from class java.lang.Object

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

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

abort

Constructor Detail

HexTable

public HexTable()

Method Detail

find

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

Description copied from interface: QuadTable

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

Specified by:

find in interface QuadTable

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

add

public void add(Quad q)

Description copied from interface: TupleTable

Add a tuple to the table

Specified by:

add in interface TupleTable<Quad>

Parameters:

q - the tuple to add

delete

public void delete(Quad q)

Description copied from interface: TupleTable

Remove a tuple from the table

Specified by:

delete in interface TupleTable<Quad>

Parameters:

q - the tuple to remove

listGraphNodes

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

Description copied from interface: QuadTable

Discover the graphs named in the table

Specified by:

listGraphNodes in interface QuadTable

Returns:

an Stream of graph names used in this table

findInUnionGraph

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

Specified by:

findInUnionGraph in interface QuadTable

begin

public void begin(ReadWrite rw)

Description copied from interface: TransactionalComponent

Start either a READ or WRITE transaction

Specified by:

begin in interface TransactionalComponent

end

public void end()

Description copied from interface: TransactionalComponent

Finish the transaction - if a write transaction and commit() has not been called, then abort

Specified by:

end in interface TransactionalComponent

commit

public void commit()

Description copied from interface: TransactionalComponent

Commit a transaction - finish the transaction and make any changes permanent (if a "write" transaction)

Specified by:

commit in interface TransactionalComponent

clear

public void clear()

Description copied from interface: TupleTable

Clear all tuples from this table.

Specified by:

clear in interface QuadTable

Specified by:

clear in interface TupleTable<Quad>