org.ontoware.rdf2go.model
Interface Model

All Superinterfaces:

ClosableIterable<Statement>, Commitable, FindableModel, java.lang.Iterable<Statement>, Lockable, ModelAddRemove, ModelIO, ModelRemovePatterns, ModelValueFactory, ModelWriter, NamespaceSupport, QueryableModel, ReificationSupport, Sparqlable

public interface Model
extends ModelValueFactory, ModelAddRemove, ModelRemovePatterns, QueryableModel, ModelIO, Commitable, ReificationSupport, NamespaceSupport

Defines an RDF Model, and the functions to add and delete statements of all possible kinds to this model. Query functions are also provided. IMPROVE: add support for union, intersection

Author:

Max Voelkel , Benjamin Heitmann , Leo Sauermann

Method Summary

void	addModel(Model model) Adds a complete Model to this Model.
void	close() Close connection to defined, unterlying implementation. commit() is called internally.
void	dump() Dumps the whole content of the model via System.out
URI	getContextURI()
java.lang.Object	getProperty(URI propertyURI)
java.lang.Object	getUnderlyingModelImplementation()
boolean	isEmpty()
boolean	isIsomorphicWith(Model other) Two models can be equal even if they do not contain the same statements.
boolean	isOpen()
void	open() Open connection to defined, unterlying implementation
void	setProperty(URI propertyURI, java.lang.Object value) Add an arbitrary runtime property, this will not be persisted and is only available at runtime.
long	size() For plain models without any inference, this is the exact number of explicit statements.

Methods inherited from interface org.ontoware.rdf2go.model.ModelValueFactory

createBlankNode, createBlankNode, createDatatypeLiteral, createLanguageTagLiteral, createPlainLiteral, createStatement, createURI, isValidURI, newRandomUniqueURI

Methods inherited from interface org.ontoware.rdf2go.model.ModelRemovePatterns

removeStatements, removeStatements

Methods inherited from interface org.ontoware.rdf2go.model.FindableModel

contains, contains, contains, countStatements, createTriplePattern, findStatements, findStatements

Methods inherited from interface org.ontoware.rdf2go.model.Sparqlable

queryConstruct, querySelect, sparqlAsk, sparqlConstruct, sparqlDescribe, sparqlSelect

Methods inherited from interface org.ontoware.rdf2go.model.FindableModel

contains, contains, contains, countStatements, createTriplePattern, findStatements, findStatements

Methods inherited from interface org.ontoware.rdf2go.model.ModelIO

readFrom, readFrom, readFrom, readFrom, readFrom, readFrom, serialize, writeTo, writeTo, writeTo, writeTo

Methods inherited from interface org.ontoware.rdf2go.model.Commitable

commit, setAutocommit

Methods inherited from interface org.ontoware.rdf2go.model.ReificationSupport

addReificationOf, addReificationOf, deleteReification, getAllReificationsOf, hasReifications

Methods inherited from interface org.ontoware.rdf2go.model.NamespaceSupport

getNamespace, getNamespaces, removeNamespace, setNamespace

Method Detail

getContextURI

URI getContextURI()

Returns:

the context URI or null

open

void open()

Open connection to defined, unterlying implementation

close

void close()

Close connection to defined, unterlying implementation. commit() is called internally.

isOpen

boolean isOpen()

Returns:

true, if model has been opened and not yet closed.

size

long size()
          throws ModelRuntimeException

For plain models without any inference, this is the exact number of explicit statements. For models with inference, this number may be anything between the number of explicit statements up to the number of all inferrable statements plus the number of explicit statements. For both cases: If one new triple is added to the model, the size must increase at least one.

Returns:

the (imprecise?) number of statements in the model (see comment)

Throws:

ModelRuntimeException

isEmpty

boolean isEmpty()

Returns:

true if the model is empty, i.e. contains no statements. This is the same as size() == 0, but might be faster.

addModel

void addModel(Model model)
              throws ModelRuntimeException

Adds a complete Model to this Model. The context URI of the other model is ignored, if present. Note: this might be faster than addAll( model.iterator() );

Parameters:

model -

Throws:

ModelRuntimeException - if any internal (I/O related) exception occurs

Since:

4.6

getUnderlyingModelImplementation

java.lang.Object getUnderlyingModelImplementation()

Returns:

the native implementation (e.g. a Jena Model). Using this method breaks strict triple store independence, but exposes the full power and reduces API dependence. This method is part of the main API.

setProperty

void setProperty(URI propertyURI,
                 java.lang.Object value)

Add an arbitrary runtime property, this will not be persisted and is only available at runtime. This allows Model to serve as a central data model in larger applications (like SemVersion.ontoware.org)

Parameters:

propertyURI -

value -

getProperty

java.lang.Object getProperty(URI propertyURI)

Parameters:

propertyURI -

Returns:

stored runtime property value or null

dump

void dump()

Dumps the whole content of the model via System.out

isIsomorphicWith

boolean isIsomorphicWith(Model other)

Two models can be equal even if they do not contain the same statements. We owe this problem mainly to blank nodes. See http://www.w3.org/TR/2002/WD-rdf-concepts-20020829/#xtocid103648 for the official definition of graph equality (which is based on graph isomorphism). See also http://www.w3.org/TR/rdf-mt/.

Parameters:

other -

Returns:

true if the two models are isomorphic as defined in http://www.w3.org/TR/rdf-mt/