Package com.stardog.stark

Class Values

java.lang.Object

com.stardog.stark.Values

public final class Values
extends java.lang.Object

Utility functions for creating and working with RDF values

Since:

1.0

Version:

1.0

Author:

Michael Grove

Field Summary

Fields

Modifier and Type	Field	Description
static IRI	ALL_GRAPHS	Special IRI representing the union of the local and virtual graphs
static javax.xml.datatype.DatatypeFactory	DATATYPE_FACTORY	Datatype factory that will be used for date/time literals.
static IRI	DEFAULT_GRAPH	Special IRI representing the default (no) context.
static IRI	LOCAL_GRAPHS	Special IRI representing the union of the local (non-virtual) default graph and all local named graphs
static IRI	NAMED_GRAPHS	Special IRI representing only local named graphs; this excludes the default graph
static IRI	VIRTUAL_GRAPHS	Special IRI representing the union of the virtual graphs
static java.lang.String	VIRTUAL_NAMESPACE	Namespace reserved for virtual graph names

Method Summary

Modifier and Type	Method	Description
static BNode	bnode()	Create a new BNode
static BNode	bnode(java.lang.String theId)	Create a new BNode
static boolean	containsInvalidIRICharacters(java.lang.String theIRI)
static boolean	containsLeadingOrTrailingWhitespace(java.lang.String theIRI)
static IRI	iri(java.lang.String theIRI)	Create a new IRI
static IRI	iri(java.lang.String theNS, java.lang.String theLocalName)	Create a new IRI from a namespace and a local name
static boolean	isAll(Resource theContext)	Return whether or not the resource represents the meta-context ALL_GRAPHS
static boolean	isDefaultGraph(Resource theContext)	Return whether or not the given Resource denotes the default graph
static boolean	isInDefaultGraph(Statement theStmt)	Return whether or not the given Statement is in the default graph
static boolean	isNamed(Resource theContext)	Return whether or not the resource represents the meta-context NAMED_GRAPHS
static boolean	isValid(IRI theIRI)	Verifies that the given IRI is valid.
static boolean	isValid(Literal theLiteral)	Verifies that the given literal is valid.
static boolean	isValid(Value theValue)	Verifies that the given value is valid.
static boolean	isVirtual(Resource theContext)	Return whether or not the resource represents a virtual graph (starts with VIRTUAL_NAMESPACE
static Literal	literal(boolean theValue)	Create a new `xsd:boolean` Literal
static Literal	literal(byte theValue)	Create a new `xsd:byte` Literal
static Literal	literal(double theValue)	Create a new `xsd:double` Literal
static Literal	literal(float theValue)	Create a new `xsd:float` Literal
static Literal	literal(int theValue)	Create a new `xsd:int` Literal
static Literal	literal(int theLabel, Datatype theDatatype)	Create a new Literal
static Literal	literal(long theValue)	Create a new `xsd:long` Literal
static Literal	literal(long theLabel, Datatype theDatatype)	Create a new Literal
static Literal	literal(short theValue)	Create a new `xsd:short` Literal
static Literal	literal(java.lang.Number theNumber)
static Literal	literal(java.lang.String theLabel)	Create a new `xsd:string` Literal
static Literal	literal(java.lang.String theLabel, Datatype theDatatype)	Create a new Literal
static Literal	literal(java.lang.String theLabel, IRI theDatatype)	Create a new typed Literal
static Literal	literal(java.lang.String theLabel, java.lang.String theLanguage)	Create a new language Literal
static Literal	literal(java.math.BigDecimal theBigDecimal)
static Literal	literal(java.math.BigInteger theInt)
static Literal	literal(java.util.Date theDate)	Create a new Literal for the given `Date` value.
static Literal	literal(java.util.GregorianCalendar theDate)	Create a new calendar based Literal.
static Literal	literal(javax.xml.datatype.Duration theDuration)	Create a Duration typed literal.
static Literal	literal(javax.xml.datatype.Duration theCalendar, Datatype theDatatype)
static Literal	literal(javax.xml.datatype.Duration theDuration, IRI theDurationType)	Create a Duration typed literal.
static Literal	literal(javax.xml.datatype.XMLGregorianCalendar theCalendar)	Create a new calendar based Literal.
static Literal	literal(javax.xml.datatype.XMLGregorianCalendar theCalendar, Datatype theDatatype)
static Namespace	namespace(java.lang.String thePrefix, java.lang.String theIRI)	Create a Namespace
static Resource	resource(java.lang.String id)	Treats IDs starting with "_:" as stable bnodes and creates BNode objects for them, otherwise creates IRIs.
static Statement	statement(Resource theSubject, IRI thePredicate, Value theObject)	Create a new Statement in the default graph
static Statement	statement(Resource theSubject, IRI thePredicate, Value theObject, Resource theContext)	Create a new Statement

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_GRAPH

public static final IRI DEFAULT_GRAPH

Special IRI representing the default (no) context.

LOCAL_GRAPHS

public static final IRI LOCAL_GRAPHS

Special IRI representing the union of the local (non-virtual) default graph and all local named graphs

NAMED_GRAPHS

public static final IRI NAMED_GRAPHS

Special IRI representing only local named graphs; this excludes the default graph

ALL_GRAPHS

public static final IRI ALL_GRAPHS

Special IRI representing the union of the local and virtual graphs

VIRTUAL_GRAPHS

public static final IRI VIRTUAL_GRAPHS

Special IRI representing the union of the virtual graphs

DATATYPE_FACTORY

public static final javax.xml.datatype.DatatypeFactory DATATYPE_FACTORY

Datatype factory that will be used for date/time literals. Cached to boost performance.

VIRTUAL_NAMESPACE

public static final java.lang.String VIRTUAL_NAMESPACE

Namespace reserved for virtual graph names

See Also:

Constant Field Values

Method Detail

namespace

@Nonnull
public static Namespace namespace(@Nonnull
                                  java.lang.String thePrefix,
                                  @Nonnull
                                  java.lang.String theIRI)

Create a Namespace

Parameters:

thePrefix - the prefix

theIRI - the IRI

Returns:

the new `Namespace`

iri

@Nonnull
public static IRI iri(@Nonnull
                      java.lang.String theNS,
                      @Nonnull
                      java.lang.String theLocalName)

Create a new IRI from a namespace and a local name

Parameters:

theNS - the namespace IRI

theLocalName - the local name

Returns:

the new `IRI`

iri

@Nonnull
public static IRI iri(@Nonnull
                      java.lang.String theIRI)

Create a new IRI

Parameters:

theIRI - the IRI string

Returns:

the new `IRI`

bnode

@Nonnull
public static BNode bnode()

Create a new BNode

Returns:

the new `BNode`

bnode

@Nonnull
public static BNode bnode(@Nonnull
                          java.lang.String theId)

Create a new BNode

Parameters:

theId - the id of the bnode

Returns:

the new `BNode`

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.lang.String theLabel)

Create a new `xsd:string` Literal

Parameters:

theLabel - the label

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(boolean theValue)

Create a new `xsd:boolean` Literal

Parameters:

theValue - the value

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(int theValue)

Create a new `xsd:int` Literal

Parameters:

theValue - the value

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(long theValue)

Create a new `xsd:long` Literal

Parameters:

theValue - the value

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(float theValue)

Create a new `xsd:float` Literal

Parameters:

theValue - the value

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(double theValue)

Create a new `xsd:double` Literal

Parameters:

theValue - the value

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(short theValue)

Create a new `xsd:short` Literal

Parameters:

theValue - the value

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(byte theValue)

Create a new `xsd:byte` Literal

Parameters:

theValue - the value

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.lang.String theLabel,
                              @Nonnull
                              IRI theDatatype)

Create a new typed Literal

Parameters:

theLabel - the label of the literal

theDatatype - the datatype

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.lang.String theLabel,
                              @Nonnull
                              java.lang.String theLanguage)

Create a new language Literal

Parameters:

theLabel - the label of the literal

theLanguage - the language of the literal

Returns:

the new `Literal`

literal

@Nonnull
public static Literal literal(int theLabel,
                              @Nonnull
                              Datatype theDatatype)

Create a new Literal

Parameters:

theLabel - the label of the literal value

theDatatype - the datatype

Returns:

the literal

Throws:

java.lang.IllegalArgumentException - if the provided value `theLabel` is not syntactically correct wrt to its Datatype

literal

@Nonnull
public static Literal literal(long theLabel,
                              @Nonnull
                              Datatype theDatatype)

Create a new Literal

Parameters:

theLabel - the label of the literal value

theDatatype - the datatype

Returns:

the literal

Throws:

java.lang.IllegalArgumentException - if the provided value `theLabel` is not syntactically correct wrt to its Datatype

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.lang.Number theNumber)

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.lang.String theLabel,
                              @Nonnull
                              Datatype theDatatype)

Create a new Literal

Parameters:

theLabel - the label of the literal value

theDatatype - the datatype

Returns:

the literal

Throws:

java.lang.NumberFormatException - if the literal is declared as a number, such as an `int` but is not syntactically correct.

java.lang.IllegalArgumentException - if the provided value `theLabel` is not syntactically correct wrt to its Datatype

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.util.Date theDate)

Create a new Literal for the given `Date` value.

Parameters:

theDate - the value of the literal

Returns:

the new literal

See Also:

CalendarLiteral

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.util.GregorianCalendar theDate)

Create a new calendar based Literal.

Parameters:

theDate - the value of the literal

Returns:

the new literal

See Also:

CalendarLiteral

literal

@Nonnull
public static Literal literal(@Nonnull
                              javax.xml.datatype.Duration theDuration)

Create a Duration typed literal.

Parameters:

theDuration - the duration

Returns:

the new duration literal

literal

@Nonnull
public static Literal literal(@Nonnull
                              javax.xml.datatype.Duration theDuration,
                              @Nonnull
                              IRI theDurationType)

Create a Duration typed literal. Uses the datatype specified in the method; care should be used to ensure that it's one of the xsd duration types. If not, comparison results could be indeterminate or incorrect.

Parameters:

theDuration - the duration

theDurationType - the duration datatype

Returns:

the new duration literal

literal

@Nonnull
public static Literal literal(@Nonnull
                              javax.xml.datatype.XMLGregorianCalendar theCalendar)

Create a new calendar based Literal.

Parameters:

theCalendar - the value of the literal

Returns:

the new literal

See Also:

CalendarLiteral

literal

@Nonnull
public static Literal literal(@Nonnull
                              javax.xml.datatype.XMLGregorianCalendar theCalendar,
                              @Nonnull
                              Datatype theDatatype)

literal

@Nonnull
public static Literal literal(@Nonnull
                              javax.xml.datatype.Duration theCalendar,
                              @Nonnull
                              Datatype theDatatype)

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.math.BigDecimal theBigDecimal)

literal

@Nonnull
public static Literal literal(@Nonnull
                              java.math.BigInteger theInt)

statement

@Nonnull
public static Statement statement(@Nonnull
                                  Resource theSubject,
                                  @Nonnull
                                  IRI thePredicate,
                                  @Nonnull
                                  Value theObject)

Create a new Statement in the default graph

Parameters:

theSubject - the subject of the statement

thePredicate - the predicate of the statement

theObject - the object of the statement

Returns:

the new `Statement`

isValid

public static boolean isValid(Literal theLiteral)

Verifies that the given literal is valid. Checks if the supplied lexical value is valid for the given datatype. For language literals, it is checked if the language tag conforms to the RFC3066 spec.

Parameters:

theLiteral - the literal to validate

Returns:

true if it is a valid literal, false otherwise

isValid

public static boolean isValid(IRI theIRI)

Verifies that the given IRI is valid.

Parameters:

theIRI - the IRI to validate

Returns:

true if it is a valid IRI, false otherwise

containsInvalidIRICharacters

public static boolean containsInvalidIRICharacters(java.lang.String theIRI)

containsLeadingOrTrailingWhitespace

public static boolean containsLeadingOrTrailingWhitespace(java.lang.String theIRI)

isValid

public static boolean isValid(Value theValue)

Verifies that the given value is valid.

Parameters:

theValue - the value to validate

Returns:

true if it is a valid value, false otherwise

statement

@Nonnull
public static Statement statement(@Nonnull
                                  Resource theSubject,
                                  @Nonnull
                                  IRI thePredicate,
                                  @Nonnull
                                  Value theObject,
                                  Resource theContext)

Create a new Statement

Parameters:

theSubject - the subject of the statement

thePredicate - the predicate of the statement

theObject - the object of the statement

theContext - the context of the statement. if the statement is intended to be in the default graph, DEFAULT_GRAPH should be used.

Returns:

the new `Statement`

isDefaultGraph

public static boolean isDefaultGraph(Resource theContext)

Return whether or not the given Resource denotes the default graph

Parameters:

theContext - the graph

Returns:

`true` if the default graph, false otherwise

isVirtual

public static boolean isVirtual(Resource theContext)

Return whether or not the resource represents a virtual graph (starts with VIRTUAL_NAMESPACE

isInDefaultGraph

public static boolean isInDefaultGraph(@Nonnull
                                       Statement theStmt)

Return whether or not the given Statement is in the default graph

Parameters:

theStmt - the graph

Returns:

`true` if the default graph, false otherwise

isAll

public static boolean isAll(@Nonnull
                            Resource theContext)

Return whether or not the resource represents the meta-context ALL_GRAPHS

Parameters:

theContext - the context

Returns:

true if its ALL, false otherwise

isNamed

public static boolean isNamed(@Nonnull
                              Resource theContext)

Return whether or not the resource represents the meta-context NAMED_GRAPHS

Parameters:

theContext - the context

Returns:

true if its NAMED, false otherwise

resource

public static Resource resource(java.lang.String id)

Treats IDs starting with "_:" as stable bnodes and creates BNode objects for them, otherwise creates IRIs.

Parameters:

id - resource ID

Returns:

IRI or bnode