org.hobbit.utils.rdf

Class HashingRDFVisitor

java.lang.Object

org.hobbit.utils.rdf.HashingRDFVisitor

All Implemented Interfaces:

org.apache.jena.rdf.model.RDFVisitor

public class HashingRDFVisitor
extends Object
implements org.apache.jena.rdf.model.RDFVisitor

A class for serializing URI and literal nodes in the format used for hashing.

Author:

Denis Kuchelev

Field Summary

Fields

Modifier and Type	Field and Description
static HashingRDFVisitor	instance

Constructor Summary

Constructors

Constructor and Description
HashingRDFVisitor()

Method Summary

Modifier and Type	Method and Description
String	visitBlank(org.apache.jena.rdf.model.Resource r, org.apache.jena.rdf.model.AnonId id) Method to call when visiting a blank node r with identifier id.
String	visitLiteral(org.apache.jena.rdf.model.Literal l) Method to call when visiting a literal RDF node l.
String	visitURI(org.apache.jena.rdf.model.Resource r, String uri) Method to call when visiting a URI node r with the given uri.

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static HashingRDFVisitor instance

Constructor Detail

HashingRDFVisitor

public HashingRDFVisitor()

Method Detail

visitBlank

public String visitBlank(org.apache.jena.rdf.model.Resource r,
                         org.apache.jena.rdf.model.AnonId id)

Method to call when visiting a blank node r with identifier id. This implementation does not expect any blank nodes.

Specified by:

visitBlank in interface org.apache.jena.rdf.model.RDFVisitor

Parameters:

r - the blank RDF node being visited

id - the identifier of that node

Throws:

IllegalStateException

visitURI

public String visitURI(org.apache.jena.rdf.model.Resource r,
                       String uri)

Method to call when visiting a URI node r with the given uri.

Specified by:

visitURI in interface org.apache.jena.rdf.model.RDFVisitor

Parameters:

r - the URI node being visited

uri - the URI string of that node

Returns:

value to be returned from the visit

visitLiteral

public String visitLiteral(org.apache.jena.rdf.model.Literal l)

Method to call when visiting a literal RDF node l.

Specified by:

visitLiteral in interface org.apache.jena.rdf.model.RDFVisitor

Parameters:

l - the RDF Literal node

Returns:

a value to be returned from the visit