Module org.apache.jena.core

Package org.apache.jena.rdf.model.impl

Class StatementImpl

java.lang.Object

org.apache.jena.rdf.model.impl.StatementBase

org.apache.jena.rdf.model.impl.StatementImpl

All Implemented Interfaces:

FrontsTriple, Statement

public class StatementImpl
extends StatementBase
implements Statement

An implementation of Statement.

Constructor Summary

Constructors

Constructor	Description
StatementImpl(Resource subject, Property predicate, RDFNode object)
StatementImpl(Resource subject, Property predicate, RDFNode object, ModelCom model)	Creates new StatementImpl

Method Summary

Modifier and Type	Method	Description
Triple	asTriple()
static Triple[]	asTriples(Statement[] statements)	returns an array of triples corresponding to the array of statements; ie the i'th element of the result is the i'th element of the input as a triple.
static RDFNode	createObject(Node n, EnhGraph g)	create an RDF node which might be a literal, or not.
boolean	equals(Object o)	.equals() defers to .sameAs so we only get the complexity of one cast.
Alt	getAlt()	Return the object of the statement.
Bag	getBag()	Return the object of the statement.
RDFList	getList()	Return the object of the statement as an RDF List.
Literal	getLiteral()	get the object field of this statement, insisting that it be a Literal.
RDFNode	getObject()	An accessor funtion to return the object of the statement.
Property	getPredicate()	An accessor function to return the predicate of the statement.
Statement	getProperty(Property p)	Get a property of the object of the statement.
Resource	getResource()	Return the object of the statement.
Seq	getSeq()	Return the object of the statement.
Statement	getStatementProperty(Property p)	Return a property of this statement.
Resource	getSubject()	An accessor method to return the subject of the statements.
int	hashCode()	Returns asTriple().hashCode()
Statement	remove()	Remove this statement from its associated model.
static Statement	toStatement(Triple t, ModelCom eg)	create a Statement from the triple _t_ in the enhanced graph _eg_.

Methods inherited from class org.apache.jena.rdf.model.impl.StatementBase

changeLiteralObject, changeLiteralObject, changeLiteralObject, changeLiteralObject, changeLiteralObject, changeLiteralObject, changeObject, changeObject, changeObject, getBoolean, getByte, getChar, getDouble, getFloat, getInt, getLanguage, getLong, getModel, getShort, getString, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.jena.rdf.model.Statement

changeLiteralObject, changeLiteralObject, changeLiteralObject, changeLiteralObject, changeLiteralObject, changeLiteralObject, changeObject, changeObject, changeObject, getBoolean, getByte, getChar, getDouble, getFloat, getInt, getLanguage, getLong, getModel, getShort, getString

Constructor Details

StatementImpl

public StatementImpl(Resource subject,
 Property predicate,
 RDFNode object,
 ModelCom model)

Creates new StatementImpl

StatementImpl

public StatementImpl(Resource subject,
 Property predicate,
 RDFNode object)

Method Details

toStatement

public static Statement toStatement(Triple t,
 ModelCom eg)

create a Statement from the triple _t_ in the enhanced graph _eg_. The Statement has subject, predicate, and object corresponding to those of _t_.

getSubject

public Resource getSubject()

Description copied from interface: Statement

An accessor method to return the subject of the statements.

Specified by:

getSubject in interface Statement

Specified by:

getSubject in class StatementBase

Returns:

The subject of the statement.

getPredicate

public Property getPredicate()

Description copied from interface: Statement

An accessor function to return the predicate of the statement.

Specified by:

getPredicate in interface Statement

Specified by:

getPredicate in class StatementBase

Returns:

The predicate of the statement.

getObject

public RDFNode getObject()

Description copied from interface: Statement

An accessor funtion to return the object of the statement.

Specified by:

getObject in interface Statement

Specified by:

getObject in class StatementBase

Returns:

Return the object of the statement.

getStatementProperty

public Statement getStatementProperty(Property p)

Description copied from interface: Statement

Return a property of this statement.

The model associated with this statement is searched for a statement with this statement as subject and the specified property as predicate. If such a statement is found it is return. If more than one exists in the model, then it is undefined which is returned. If no such statement exists, an exception is thrown.

Specified by:

getStatementProperty in interface Statement

Parameters:

p - the property sought

Returns:

a statement representing an instance of the specified property.

getResource

public Resource getResource()

Description copied from interface: Statement

Return the object of the statement.

An exception will be thrown if the object is not a resource.

Specified by:

getResource in interface Statement

Specified by:

getResource in class StatementBase

Returns:

The Resource which is the object of the statement.

getProperty

public Statement getProperty(Property p)

Description copied from interface: Statement

Get a property of the object of the statement.

There is an unfortunate ambiguity here. GetProperty would normally treat the statement as a resource, and return a property about this statement. This is not what is wanted in most cases, so getProperty on a statement is defined to call getProperty on its object. If a property of the statement itself is required, getStatementProperty should be used.

If the object of the statement is not a resource, an exception is thrown.

Specified by:

getProperty in interface Statement

Parameters:

p - the property sought

Returns:

a statement representing an instance of the required property

getLiteral

public Literal getLiteral()

get the object field of this statement, insisting that it be a Literal. If it isn't, throw LiteralRequiredException.

Specified by:

getLiteral in interface Statement

Specified by:

getLiteral in class StatementBase

Returns:

The Literal which is the object of the statement.

getBag

public Bag getBag()

Description copied from interface: Statement

Return the object of the statement.

An exception will be thrown if the object is not a Resource.

Specified by:

getBag in interface Statement

Returns:

The object of the statement interpreted as a value of the specified type.

getAlt

public Alt getAlt()

Description copied from interface: Statement

Return the object of the statement.

An exception will be thrown if the object is not a Resource.

Specified by:

getAlt in interface Statement

Returns:

The object of the statement interpreted as a value of the specified type.

getSeq

public Seq getSeq()

Description copied from interface: Statement

Return the object of the statement.

An exception will be thrown if the object is not a Resource.

Specified by:

getSeq in interface Statement

Returns:

The object of the statement interpreted as a value of the specified type.

getList

public RDFList getList()

Description copied from interface: Statement

Return the object of the statement as an RDF List.

An exception will be thrown if the object is not an RDFList.

Specified by:

getList in interface Statement

Returns:

The object of the statement interpreted as a value as RDFList.

equals

public boolean equals(Object o)

.equals() defers to .sameAs so we only get the complexity of one cast.

Specified by:

equals in interface Statement

Overrides:

equals in class Object

Parameters:

o - the object to be compared

Returns:

true if and only if the equality condition is met.

hashCode

public int hashCode()

Description copied from interface: Statement

Returns asTriple().hashCode()

Specified by:

hashCode in interface Statement

Overrides:

hashCode in class Object

remove

public Statement remove()

Description copied from interface: Statement

Remove this statement from its associated model.

The statement with the same subject, predicate and object as this statement will be removed from the model associated with this statement.

Specified by:

remove in interface Statement

Returns:

this statement.

asTriple

public Triple asTriple()

Specified by:

asTriple in interface FrontsTriple

asTriples

public static Triple[] asTriples(Statement[] statements)

returns an array of triples corresponding to the array of statements; ie the i'th element of the result is the i'th element of the input as a triple.

Parameters:

statements - the array of statements to convert

Returns:

the corresponding array of triples

createObject

public static RDFNode createObject(Node n,
 EnhGraph g)

create an RDF node which might be a literal, or not.