Module org.apache.jena.arq

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

Enum Class TripleTableForm

java.lang.Object

java.lang.Enum<TripleTableForm>

org.apache.jena.sparql.core.mem.TripleTableForm

All Implemented Interfaces:

Serializable, Comparable<TripleTableForm>, Constable, Predicate<Set<TupleSlot>>, Supplier<TripleTable>

public enum TripleTableForm
extends Enum<TripleTableForm>
implements Supplier<TripleTable>, Predicate<Set<TupleSlot>>

Forms for triple indexes.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
OSP	Object-subject-predicate.
POS	Predicate-object-subject.
SPO	Subject-predicate-object.

Field Summary

Fields

Modifier and Type	Field	Description
final Set<TupleSlot>	onePrefix	Prefixes of the pattern for this table form.
final Set<TupleSlot>	twoPrefix	Prefixes of the pattern for this table form.

Method Summary

Modifier and Type	Method	Description
static TripleTableForm	chooseFrom(Set<TupleSlot> pattern)
TripleTable	get()
static Stream<TripleTableForm>	tableForms()
boolean	test(Set<TupleSlot> pattern)
static TripleTableForm	valueOf(String name)	Returns the enum constant of this class with the specified name.
static TripleTableForm[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, describeConstable, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.function.Predicate

and, negate, or

Enum Constant Details

SPO

public static final TripleTableForm SPO

Subject-predicate-object.

POS

public static final TripleTableForm POS

Predicate-object-subject.

OSP

public static final TripleTableForm OSP

Object-subject-predicate.

Field Details

twoPrefix

public final Set<TupleSlot> twoPrefix

Prefixes of the pattern for this table form.

onePrefix

public final Set<TupleSlot> onePrefix

Prefixes of the pattern for this table form.

Method Details

values

public static TripleTableForm[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static TripleTableForm valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

get

public TripleTable get()

Specified by:

get in interface Supplier<TripleTable>

test

public boolean test(Set<TupleSlot> pattern)

Specified by:

test in interface Predicate<Set<TupleSlot>>

Parameters:

pattern -

Returns:

whether this index form avoids traversal for a query of this pattern

chooseFrom

public static TripleTableForm chooseFrom(Set<TupleSlot> pattern)

Parameters:

pattern -

Returns:

the most appropriate choice of index form for that query

tableForms

public static Stream<TripleTableForm> tableForms()

Returns:

a stream of these table forms