org.apache.jena.sparql.core.mem

Enum TripleTableForm

java.lang.Object

java.lang.Enum<TripleTableForm>

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

All Implemented Interfaces:

Serializable, Comparable<TripleTableForm>, java.util.function.Predicate<Set<TupleSlot>>, java.util.function.Supplier<TripleTable>

public enum TripleTableForm
extends Enum<TripleTableForm>
implements java.util.function.Supplier<TripleTable>, java.util.function.Predicate<Set<TupleSlot>>

Forms for triple indexes.

Enum Constant Summary

Enum Constants

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

Field Summary

Fields

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

Method Summary

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

Methods inherited from class java.lang.Enum

compareTo, 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, isEqual, negate, or

Enum Constant Detail

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 Detail

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 Detail

values

public static TripleTableForm[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (TripleTableForm c : TripleTableForm.values())
    System.out.println(c);

Returns:

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

valueOf

public static TripleTableForm valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified name

NullPointerException - if the argument is null

get

public TripleTable get()

Specified by:

get in interface java.util.function.Supplier<TripleTable>

test

public boolean test(Set<TupleSlot> pattern)

Specified by:

test in interface java.util.function.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 java.util.stream.Stream<TripleTableForm> tableForms()

Returns:

a stream of these table forms