org.ontoware.rdf2go.model

Interface FindableModel

All Known Subinterfaces:

Model, ModelRemovePatterns, PersistentModel, QueryableModel

All Known Implementing Classes:

AbstractLockingModel, AbstractModel, AbstractModelRemovePatterns, DelegatingModel, DirtyAbstractModel, LoggingModel, NotifyingModelLayer, RepositoryModel

public interface FindableModel

A model where you can list all statements, find statements and check if a statement is contained.

Author:

voelkel

Method Summary

Modifier and Type	Method and Description
boolean	contains(ResourceOrVariable subject, UriOrVariable predicate, NodeOrVariable object)
boolean	contains(ResourceOrVariable subject, UriOrVariable predicate, String plainLiteral) Convenience function.
boolean	contains(Statement s)
long	countStatements(TriplePattern pattern)
TriplePattern	createTriplePattern(ResourceOrVariable subject, UriOrVariable predicate, NodeOrVariable object)
ClosableIterator<Statement>	findStatements(ResourceOrVariable subject, UriOrVariable predicate, NodeOrVariable object) get all statements in the model with this subject, predicate and object.
ClosableIterator<Statement>	findStatements(TriplePattern pattern) Iterator must be auto-close, i.e.

Method Detail

findStatements

ClosableIterator<Statement> findStatements(ResourceOrVariable subject,
                                           UriOrVariable predicate,
                                           NodeOrVariable object)
                                    throws ModelRuntimeException

get all statements in the model with this subject, predicate and object. Each of those (s,p,o) can be Variable.ANY Iterator must be auto-close, i.e. when last element is fetched, the implementation must call close().

Parameters:

subject - URI or Object (= blankNode) or Variable

predicate - URI or Variable

object - URI or String (=plainLiteral) or BlankNode (=blankNode) or TypedLiteral or LanguageTagLiteral or Variable

Returns:

a statement iterator

Throws:

ModelRuntimeException - most often caused by underlying IOException, if any

findStatements

ClosableIterator<Statement> findStatements(TriplePattern pattern)
                                    throws ModelRuntimeException

Iterator must be auto-close, i.e. when last element is fetched, the implementation must call close().

Parameters:

pattern - to be matched

Returns:

statement iterator returning all triples matching the given pattern

Throws:

ModelRuntimeException - most often caused by underlying IOException, if any

countStatements

long countStatements(TriplePattern pattern)
              throws ModelRuntimeException

Returns:

the number of statements in the model matching the query

Throws:

ModelRuntimeException

contains

boolean contains(ResourceOrVariable subject,
                 UriOrVariable predicate,
                 NodeOrVariable object)
          throws ModelRuntimeException

Parameters:

subject - defined or a Variable, e.g. Variable.ANY

predicate - defined or a Variable, e.g. Variable.ANY

object - defined or a Variable, e.g. Variable.ANY

Returns:

true if the statement (subject, predicate, object) is in the model

Throws:

ModelRuntimeException - most often caused by underlying IOException, if any

contains

boolean contains(ResourceOrVariable subject,
                 UriOrVariable predicate,
                 String plainLiteral)
          throws ModelRuntimeException

Convenience function.

Parameters:

subject - defined or a Variable, e.g. Variable.ANY

predicate - defined or a Variable, e.g. Variable.ANY

plainLiteral - a string interpreted as adefined PlainLiteral

Returns:

true if model contains statement (s,p,'o')

Throws:

ModelRuntimeException - most often caused by underlying IOException, if any

contains

boolean contains(Statement s)
          throws ModelRuntimeException

Parameters:

s - a Statement

Returns:

true if the model contains a statement s

Throws:

ModelRuntimeException - most often caused by underlying IOException, if any

createTriplePattern

TriplePattern createTriplePattern(ResourceOrVariable subject,
                                  UriOrVariable predicate,
                                  NodeOrVariable object)

Parameters:

subject - defined or a Variable, e.g. Variable.ANY

predicate - defined or a Variable, e.g. Variable.ANY

object - defined or a Variable, e.g. Variable.ANY

Returns:

a triple pattern