Package org.apache.jena.rdf.model

Class ResourceFactory

java.lang.Object

org.apache.jena.rdf.model.ResourceFactory

public class ResourceFactory
extends java.lang.Object

A Factory class for creating resources.

This class creates resources and properties and things of that ilk. These resources are not associated with a user-modifiable model: doing getModel() on them will return null.

It is designed as a singleton. There are static convenience methods on this class itself, so the easy way to create resource is for example to do something like:

 
   Resource r = ResourceFactory.createResource();
 

If a factory object is needed, then this can be obtained using the getInstance method on the class. The factory object used may be changed using the setInstance method.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	ResourceFactory.Interface	The interface to resource factory objects.

Method Summary

Modifier and Type	Method	Description
static Literal	createLangLiteral(java.lang.String string, java.lang.String lang)	Answer a literal with language and the given content.
static Literal	createPlainLiteral(java.lang.String string)	Answer a string (xsd:string) literal.
static Property	createProperty(java.lang.String uriref)	Create a new property.
static Property	createProperty(java.lang.String namespace, java.lang.String localName)	Create a new property.
static Resource	createResource()	Create a new anonymous resource.
static Resource	createResource(java.lang.String uriref)	Create a new resource.
static Statement	createStatement(Resource subject, Property predicate, RDFNode object)	Create a new statement.
static Resource	createStmtResource(Statement statement)	Create a new resource representing an RDF-star triple term.
static Literal	createStringLiteral(java.lang.String string)	Answer a string (xsd:string) literal.
static Literal	createTypedLiteral(java.lang.Object value)	Answer a typed literal.
static Literal	createTypedLiteral(java.lang.String string, RDFDatatype dType)	Answer a typed literal.
static ResourceFactory.Interface	getInstance()	Get the current factory object.
static ResourceFactory.Interface	setInstance(ResourceFactory.Interface newInstance)	Set the current factory object.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static ResourceFactory.Interface getInstance()

Get the current factory object.

Returns:

the current factory object

setInstance

public static ResourceFactory.Interface setInstance(ResourceFactory.Interface newInstance)

Set the current factory object.

Parameters:

newInstance - the new factory object

Returns:

the previous factory object

createResource

public static Resource createResource()

Create a new anonymous resource.

Uses the current factory object to create a new anonymous resource.

Returns:

a new anonymous resource

createResource

public static Resource createResource(java.lang.String uriref)

Create a new resource.

Uses the current factory object to create a new resource.

Parameters:

uriref - URIREF of the resource

Returns:

a new resource

createStmtResource

public static Resource createStmtResource(Statement statement)

Create a new resource representing an RDF-star triple term.

Parameters:

statement -

Returns:

a new resource

createPlainLiteral

public static Literal createPlainLiteral(java.lang.String string)

Answer a string (xsd:string) literal. This is the equivalent of a plain literal with no language from RDF 1.0 (also called a simple literal in SPARQL) Using createStringLiteral(java.lang.String) is preferred; "plain literal" is RDF 1.0 terminology.

Parameters:

string - the string which forms the value of the literal

Returns:

a Literal node with that string as value

createStringLiteral

public static Literal createStringLiteral(java.lang.String string)

Answer a string (xsd:string) literal. This is the equivalent of a plain literal with no language from RDF 1.0 (also called a simple literal in SPARQL)

Parameters:

string - the string which forms the value of the literal

Returns:

a Literal node with that string as value

createLangLiteral

public static Literal createLangLiteral(java.lang.String string,
                                        java.lang.String lang)

Answer a literal with language and the given content. The literal will have datatype rdf:langString.

Parameters:

string - the string which forms the value of the literal

lang - The language tag to be used

Returns:

a Literal node with that string as value

createTypedLiteral

public static Literal createTypedLiteral(java.lang.String string,
                                         RDFDatatype dType)

Answer a typed literal.

Parameters:

string - the string which forms the value of the literal

dType - RDFDatatype of the type literal

Returns:

a Literal node with that string as value

createTypedLiteral

public static Literal createTypedLiteral(java.lang.Object value)

Answer a typed literal.

Parameters:

value - a java Object, the default RDFDatatype for that object will be used

Returns:

a Literal node with that value

createProperty

public static Property createProperty(java.lang.String uriref)

Create a new property.

Uses the current factory object to create a new resource.

Parameters:

uriref - URIREF of the property

Returns:

a new property

createProperty

public static Property createProperty(java.lang.String namespace,
                                      java.lang.String localName)

Create a new property.

Uses the current factory object to create a new property.

Parameters:

namespace - URIREF of the namespace of the property

localName - localname of the property

Returns:

a new property

createStatement

public static Statement createStatement(Resource subject,
                                        Property predicate,
                                        RDFNode object)

Create a new statement.

Uses the current factory object to create a new statement.

Parameters:

subject - the subject of the new statement

predicate - the predicate of the new statement

object - the object of the new statement

Returns:

a new resource