org.topbraid.spin.util

Class SPTextUtil

java.lang.Object

org.topbraid.spin.util.SPTextUtil

public class SPTextUtil
extends Object

A utility to convert RDF graphs between the sp:text syntax and SPIN RDF triples. Can be used as a pre-processor of files so that they only use one syntax.

Author:

Holger Knublauch

Field Summary

Fields

Modifier and Type	Field and Description
static List<org.apache.jena.rdf.model.Property>	sparqlProperties

Constructor Summary

Constructors

Constructor and Description
SPTextUtil()

Method Summary

Modifier and Type	Method and Description
static void	addSPARQLProperty(org.apache.jena.rdf.model.Property predicate)
static void	addSPText(Command command) Adds an sp:text reflecting the SPIN RDF of a given Command.
static void	deleteSPINRDF(org.apache.jena.rdf.model.Model model) Removes any SPIN RDF syntax triples from a given Model.
static void	ensureSPINRDFExists(org.apache.jena.rdf.model.Model model) Ensures that each SPIN Command with an sp:text also has the SPIN RDF syntax triples.
static void	ensureSPTextExists(org.apache.jena.rdf.model.Model model) Ensures that each SPIN Command (query/update) in a given Model has an sp:text triple.
static boolean	hasSPINRDF(org.apache.jena.rdf.model.Resource command) Checks if a given SPIN Command has at least one other triple beside the rdf:type, sp:text and spin:thisUnbound triple.
static String	replaceQName(String text, String qname, String newQName, String newURI)
static boolean	textContainsQName(String text, String qname) Checks if a given SPARQL text contains a given qname - making sure that they are true references and not part of another qname.

Methods inherited from class java.lang.Object

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

Field Detail

sparqlProperties

public static List<org.apache.jena.rdf.model.Property> sparqlProperties

Constructor Detail

SPTextUtil

public SPTextUtil()

Method Detail

addSPARQLProperty

public static void addSPARQLProperty(org.apache.jena.rdf.model.Property predicate)

addSPText

public static void addSPText(Command command)

Adds an sp:text reflecting the SPIN RDF of a given Command.

Parameters:

command - the SPIN Command to convert

deleteSPINRDF

public static void deleteSPINRDF(org.apache.jena.rdf.model.Model model)

Removes any SPIN RDF syntax triples from a given Model. For example this will remove the sp:where triple tree from an sp:Select, but leave the surrounding sp:Select in place. You may want to call ensureSPTextExists(Model) beforehand to make sure that the resulting SPIN resources remain valid.

Parameters:

model - the Model to manipulate

ensureSPINRDFExists

public static void ensureSPINRDFExists(org.apache.jena.rdf.model.Model model)

Ensures that each SPIN Command with an sp:text also has the SPIN RDF syntax triples. For example this will create the sp:where triple for all sp:Selects, assuming they do have sp:text triples.

Parameters:

model - the Model to walk through

ensureSPTextExists

public static void ensureSPTextExists(org.apache.jena.rdf.model.Model model)

Ensures that each SPIN Command (query/update) in a given Model has an sp:text triple.

Parameters:

model - the Model to manipulate

hasSPINRDF

public static boolean hasSPINRDF(org.apache.jena.rdf.model.Resource command)

Checks if a given SPIN Command has at least one other triple beside the rdf:type, sp:text and spin:thisUnbound triple. This indicates whether SPIN RDF triples exist.

Parameters:

command - the Command to check

Returns:

true if the command has SPIN RDF triples

replaceQName

public static String replaceQName(String text,
                                  String qname,
                                  String newQName,
                                  String newURI)

textContainsQName

public static boolean textContainsQName(String text,
                                        String qname)

Checks if a given SPARQL text contains a given qname - making sure that they are true references and not part of another qname.

Parameters:

text - the SPARQL text, e.g. "ASK { ?this ex:name ?name }"

qname - the qname, e.g. "ex:name"

Returns:

true if the qname is contained in text