org.jrdf.graph
Class AbstractTriple

java.lang.Object
  org.jrdf.graph.AbstractTriple

All Implemented Interfaces:

Serializable, Triple

Direct Known Subclasses:

TripleImpl

public abstract class AbstractTriple

extends Object

implements Triple, Serializable

A base implementation of an RDF Triple.

Version:

$Revision: 1.1 $

Author:

Andrew Newman

See Also:

Serialized Form

Field Summary

protected ObjectNode	objectNode Object of this statement.
protected PredicateNode	predicateNode Predicate of this statement.
protected SubjectNode	subjectNode Subject of this statement.

Constructor Summary

AbstractTriple()

Method Summary

boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
ObjectNode	getObject() Obtains the object of this statement.
PredicateNode	getPredicate() Obtains the predicate of this statement.
SubjectNode	getSubject() Obtains the subject of this statement.
int	hashCode() Returns a hash-code value for this triple.
String	toString() Provide a legible representation of a triple.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

subjectNode

protected SubjectNode subjectNode

Subject of this statement.

predicateNode

protected PredicateNode predicateNode

Predicate of this statement.

objectNode

protected ObjectNode objectNode

Object of this statement.

Constructor Detail

AbstractTriple

public AbstractTriple()

Method Detail

getSubject

public SubjectNode getSubject()

Obtains the subject of this statement.

Specified by:

getSubject in interface Triple

Returns:

an SubjectNode which is either a BlankNode or URIReference

getPredicate

public PredicateNode getPredicate()

Obtains the predicate of this statement.

Specified by:

getPredicate in interface Triple

Returns:

a PredicateNode which is a URIReference

getObject

public ObjectNode getObject()

Obtains the object of this statement.

Specified by:

getObject in interface Triple

Returns:

a ObjectNode which is either a BlankNode, URIReference or Literal

equals

public boolean equals(Object obj)

Description copied from interface: Triple

Indicates whether some other object is "equal to" this one. A triple is equal to another triple if the subject, predicate and object are all equal.

Specified by:

equals in interface Triple

hashCode

public int hashCode()

Description copied from interface: Triple

Returns a hash-code value for this triple. The hash code is based upon XORing all of the components of a triple i.e. the subject, predicate and object.

Specified by:

hashCode in interface Triple

toString

public String toString()

Provide a legible representation of a triple. Currently, square brackets with toString values of the parts of the triple.

Returns:

the string value of the subject, predicate and object in square brackets.