com.blazegraph.gremlin.structure

Interface BlazeValueFactory

public interface BlazeValueFactory

Factory for converting Tinkerpop data (element ids, property names/values) to RDF values (URIs, Literals) and back again. This interface comes with reasonable default behavior for all methods. It can be overridden to give an application a custom look and feel for the RDF values used to represent the property graph.

Author:

mikepersonick

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	BlazeValueFactory.Defaults Some default constants.

Field Summary

Fields

Modifier and Type	Field and Description
static BlazeValueFactory	INSTANCE Default instance.

Method Summary

Modifier and Type	Method and Description
default org.openrdf.model.URI	elementURI(String id) Convert an element id into an RDF URI.
default Object	fromLiteral(org.openrdf.model.Literal l) Create a blueprints property value from a datatyped literal.
default String	fromURI(org.openrdf.model.URI uri) Convert an RDF URI (element id/label or property key) back into a string.
default org.openrdf.model.URI	historyAdded() URI used for history.
default org.openrdf.model.URI	historyRemoved() URI used for history.
default org.openrdf.model.URI	liDatatype() URI used for Cardinality.list list index datatype.
default org.openrdf.model.URI	propertyURI(String key) Convert an property key into an RDF URI.
default org.openrdf.model.Literal	toLiteral(Object value) Create a datatyped literal from a blueprints property value.
default org.openrdf.model.URI	type() URI used for element labels (typing).
default org.openrdf.model.URI	typeURI(String label) Convert an element label (type) into an RDF URI.
default org.openrdf.model.URI	value() URI used for Cardinality.list property values.

Field Detail

INSTANCE

static final BlazeValueFactory INSTANCE

Default instance.

Method Detail

type

default org.openrdf.model.URI type()

URI used for element labels (typing).

Returns:

URI used for element labels.

See Also:

BlazeValueFactory.Defaults.TYPE

value

default org.openrdf.model.URI value()

URI used for Cardinality.list property values.

Returns:

URI used for Cardinality.list property values.

See Also:

BlazeValueFactory.Defaults.VALUE

liDatatype

default org.openrdf.model.URI liDatatype()

URI used for Cardinality.list list index datatype.

Returns:

URI used for Cardinality.list list index datatype.

See Also:

BlazeValueFactory.Defaults.LI_DATATYPE

historyAdded

default org.openrdf.model.URI historyAdded()

URI used for history. Only reason to override this is if a different history implementation is used.

Returns:

URI used for history.

See Also:

RDRHistory

historyRemoved

default org.openrdf.model.URI historyRemoved()

URI used for history. Only reason to override this is if a different history implementation is used.

Returns:

URI used for history.

See Also:

RDRHistory

elementURI

default org.openrdf.model.URI elementURI(String id)

Convert an element id into an RDF URI.

Default behavior is to prepend the <blaze:> namespace to the id.

Parameters:

id - property graph element id

Returns:

RDF URI representation

propertyURI

default org.openrdf.model.URI propertyURI(String key)

Convert an property key into an RDF URI.

Default behavior is to prepend the <blaze:> namespace to the key.

Parameters:

key - property graph property key

Returns:

RDF URI representation

typeURI

default org.openrdf.model.URI typeURI(String label)

Convert an element label (type) into an RDF URI.

Default behavior is to prepend the <blaze:> namespace to the label.

Parameters:

label - property graph element label

Returns:

URI RDF URI representation

fromURI

default String fromURI(org.openrdf.model.URI uri)

Convert an RDF URI (element id/label or property key) back into a string.

Parameters:

uri - RDF representation of an element id/label or property key

Returns:

property graph (string) representation

toLiteral

default org.openrdf.model.Literal toLiteral(Object value)

Create a datatyped literal from a blueprints property value.

Supports: Float, Double, Integer, Long, Boolean, Short, Byte, and String.

fromLiteral

default Object fromLiteral(org.openrdf.model.Literal l)

Create a blueprints property value from a datatyped literal.

Return a graph property from a datatyped literal using its XSD datatype.

Supports: Float, Double, Integer, Long, Boolean, Short, Byte, and String.