edu.stanford.db.rdf.schema
Class RDFSchemaModel

java.lang.Object
  |
  +--edu.stanford.db.rdf.schema.RDFSchemaModel

All Implemented Interfaces:

Model, RDFNode, Resource, VirtualModel

public class RDFSchemaModel

extends java.lang.Object

implements VirtualModel

RDF schema model supports subclassing and validates RDF schemas.

Constructor Summary

RDFSchemaModel()

RDFSchemaModel(Model instances, Model closure)
Creates a schema model, closure must contain transitive closures of subClassOf and subPropertyOf

RDFSchemaModel(NodeFactory f)

RDFSchemaModel(NodeFactory f, Model instances, Model closure)

Method Summary

void	add(Statement t) Adds a new triple to the model.
static Model	computeClosure(Model src, Resource property) Compute a transitive closure, disallow loops.
static Model	computeClosure(Model src, Resource property, boolean allowLoops) Computes a transitive closure on a given predicate.
static Model	computeRDFSClosure(Model src)
boolean	contains(Statement t) Tests if the model contains the given triple.
Model	create() Creates empty model of the same Class
Model	duplicate() Clone the model.
java.util.Enumeration	elements() Enumerate triples
Model	find(Resource subject, Resource predicate, RDFNode object) General method to search for triples.
Model	getGroundModel()
java.lang.String	getLabel() The formal string label of the node.
java.lang.String	getLocalName() Returns the local name of the resource.
java.lang.String	getNamespace() Returns the namespace of the resource.
NodeFactory	getNodeFactory() Returns the node factory for this model
java.lang.String	getSourceURI() Returns current base URI setting.
java.lang.String	getURI() Returns the URI of the resource.
boolean	isEmpty() true if the model contains no triples
boolean	isMutable() True if the model supports add() and remove() methods.
static void	main(java.lang.String[] args)
static void	readModelsFromArgList(RDFFactory f, Model m, Model rawSchema, java.lang.String[] args)
void	remove(Statement t) Removes the triple from the model.
void	setSourceURI(java.lang.String uri) Set a base URI for the model.
int	size() Number of triples in the model
java.lang.String	toString()
static void	validate(Model instances, Model schema) Validates the model.
static void	validateRawSchema(Model rawInstances, Model rawSchema) Validates rawInstances model agains schema in rawSchema

Methods inherited from class java.lang.Object

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

Constructor Detail

RDFSchemaModel

public RDFSchemaModel()

RDFSchemaModel

public RDFSchemaModel(Model instances,
                      Model closure)

Creates a schema model, closure must contain transitive closures of subClassOf and subPropertyOf

RDFSchemaModel

public RDFSchemaModel(NodeFactory f)

RDFSchemaModel

public RDFSchemaModel(NodeFactory f,
                      Model instances,
                      Model closure)

Method Detail

getLabel

public java.lang.String getLabel()
                          throws ModelException

Description copied from interface: RDFNode

The formal string label of the node. URI in case of a resource, string in case of a literal.

Specified by:

getLabel in interface RDFNode

getURI

public java.lang.String getURI()
                        throws ModelException

Description copied from interface: Resource

Returns the URI of the resource. Triples and models must implement this method in a standard way.

Specified by:

getURI in interface Resource

Following copied from interface: org.w3c.rdf.model.Resource

Returns:

the URI of the resource

See Also:

Statement, Model

getLocalName

public java.lang.String getLocalName()
                              throws ModelException

Description copied from interface: Resource

Returns the local name of the resource. May not return null.

Specified by:

getLocalName in interface Resource

Following copied from interface: org.w3c.rdf.model.Resource

Returns:

the local name of the resource

See Also:

Statement, Model

getNamespace

public java.lang.String getNamespace()
                              throws ModelException

Description copied from interface: Resource

Returns the namespace of the resource. May return null.

Specified by:

getNamespace in interface Resource

Following copied from interface: org.w3c.rdf.model.Resource

Returns:

the namespace of the resource

See Also:

Statement, Model

getGroundModel

public Model getGroundModel()
                     throws ModelException

Specified by:

getGroundModel in interface VirtualModel

Returns:

model contains the fact basis of this model

setSourceURI

public void setSourceURI(java.lang.String uri)
                  throws ModelException

Set a base URI for the model. Affects creating of new resources and serialization syntax. Inherited method getURI returns the URI set in this method

Specified by:

setSourceURI in interface Model

getSourceURI

public java.lang.String getSourceURI()
                              throws ModelException

Returns current base URI setting.

Specified by:

getSourceURI in interface Model

size

public int size()
         throws ModelException

Number of triples in the model

Specified by:

size in interface Model

Returns:

number of triples, -1 if unknown

isEmpty

public boolean isEmpty()
                throws ModelException

true if the model contains no triples

Specified by:

isEmpty in interface Model

elements

public java.util.Enumeration elements()
                               throws ModelException

Enumerate triples

Specified by:

elements in interface Model

contains

public boolean contains(Statement t)
                 throws ModelException

Tests if the model contains the given triple.

Specified by:

contains in interface Model

Returns:

true if the triple belongs to the model; false otherwise.

add

public void add(Statement t)
         throws ModelException

Adds a new triple to the model.

Specified by:

add in interface Model

remove

public void remove(Statement t)
            throws ModelException

Removes the triple from the model.

Specified by:

remove in interface Model

find

public Model find(Resource subject,
                  Resource predicate,
                  RDFNode object)
           throws ModelException

General method to search for triples. null input for any parameter will match anything.

Example: Model result = m.find( null, RDF.type, new ResourceImpl("http://...#MyClass") )

finds all instances of the class MyClass

Specified by:

find in interface Model

duplicate

public Model duplicate()
                throws ModelException

Clone the model.

Specified by:

duplicate in interface Model

create

public Model create()
             throws ModelException

Creates empty model of the same Class

Specified by:

create in interface Model

isMutable

public boolean isMutable()
                  throws ModelException

Description copied from interface: Model

True if the model supports add() and remove() methods. A model may change behavior of this function over time.

Specified by:

isMutable in interface Model

getNodeFactory

public NodeFactory getNodeFactory()
                           throws ModelException

Returns the node factory for this model

Specified by:

getNodeFactory in interface Model

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

computeRDFSClosure

public static Model computeRDFSClosure(Model src)
                                throws ModelException

computeClosure

public static Model computeClosure(Model src,
                                   Resource property)
                            throws ModelException

Compute a transitive closure, disallow loops.

computeClosure

public static Model computeClosure(Model src,
                                   Resource property,
                                   boolean allowLoops)
                            throws ModelException

Computes a transitive closure on a given predicate. If allowLoops is set to false, an exception is thrown if a loop is encountered.

validateRawSchema

public static void validateRawSchema(Model rawInstances,
                                     Model rawSchema)
                              throws ModelException

Validates rawInstances model agains schema in rawSchema

validate

public static void validate(Model instances,
                            Model schema)
                     throws ModelException

Validates the model. schema should be RDFSchemaModel

readModelsFromArgList

public static void readModelsFromArgList(RDFFactory f,
                                         Model m,
                                         Model rawSchema,
                                         java.lang.String[] args)
                                  throws java.lang.Exception

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception