org.topbraid.spin.arq

Class ARQ2SPIN

java.lang.Object

org.topbraid.spin.arq.ARQ2SPIN

public class ARQ2SPIN
extends Object

Takes a ARQ SPARQL Query as input and creates a corresponding SPIN RDF data structure from it.

Author:

Holger Knublauch

Constructor Summary

Constructors

Constructor and Description
ARQ2SPIN(org.apache.jena.rdf.model.Model model) Constructs a new ARQ2SPIN engine for a given Model, equivalent with ARQ2SPIN(model, true).
ARQ2SPIN(org.apache.jena.rdf.model.Model model, boolean addPrefixes) Constructs a new ARQ2SPIN engine for a given Model.

Method Summary

Modifier and Type	Method and Description
ElementList	createElementList(org.apache.jena.sparql.syntax.Element pattern) Creates a SPIN ElementList from a given ARQ Element pattern.
org.apache.jena.rdf.model.RDFNode	createExpression(org.apache.jena.sparql.expr.Expr expr)
Query	createQuery(org.apache.jena.query.Query arq, String uri) Constructs a new SPIN Query from a given ARQ query, possibly with a URI.
Update	createUpdate(org.apache.jena.update.Update arq, String uri)
static String	getTextOnly(org.apache.jena.rdf.model.Resource spinCommand)
String	getVarNamespace() Gets the (optional) variable namespace.
static Query	parseQuery(String str, org.apache.jena.rdf.model.Model model) Parses a given partial query string and converts it into a SPIN structure inside a given Model.
static Update	parseUpdate(String str, org.apache.jena.rdf.model.Model model) Parses a given partial UPDATE string and converts it into a SPIN structure inside a given Model.
void	setVarNamespace(String value) Sets the variable namespace which is used to prevent the creation of too many blank nodes.

Methods inherited from class java.lang.Object

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

Constructor Detail

ARQ2SPIN

public ARQ2SPIN(org.apache.jena.rdf.model.Model model)

Constructs a new ARQ2SPIN engine for a given Model, equivalent with ARQ2SPIN(model, true).

Parameters:

model - the Model to operate on

ARQ2SPIN

public ARQ2SPIN(org.apache.jena.rdf.model.Model model,
                boolean addPrefixes)

Constructs a new ARQ2SPIN engine for a given Model.

Parameters:

model - the Model to operate on

addPrefixes - true to also let the system add missing prefixes mentioned in SPARQL expressions (e.g. the afn namespace if afn:now() is used)

Method Detail

createElementList

public ElementList createElementList(org.apache.jena.sparql.syntax.Element pattern)

Creates a SPIN ElementList from a given ARQ Element pattern.

Parameters:

pattern - the ARQ pattern to convert to SPIN

Returns:

a SPIN ElementList

createExpression

public org.apache.jena.rdf.model.RDFNode createExpression(org.apache.jena.sparql.expr.Expr expr)

createQuery

public Query createQuery(org.apache.jena.query.Query arq,
                         String uri)

Constructs a new SPIN Query from a given ARQ query, possibly with a URI.

Parameters:

arq - the ARQ query

uri - the URI of the new Query resource or null for a blank node

Returns:

the Query

createUpdate

public Update createUpdate(org.apache.jena.update.Update arq,
                           String uri)

getTextOnly

public static String getTextOnly(org.apache.jena.rdf.model.Resource spinCommand)

getVarNamespace

public String getVarNamespace()

Gets the (optional) variable namespace.

Returns:

the variable namespace

parseQuery

public static Query parseQuery(String str,
                               org.apache.jena.rdf.model.Model model)

Parses a given partial query string and converts it into a SPIN structure inside a given Model.

Parameters:

str - the partial query string

model - the Model to operate on

Returns:

the new SPIN Query

parseUpdate

public static Update parseUpdate(String str,
                                 org.apache.jena.rdf.model.Model model)

Parses a given partial UPDATE string and converts it into a SPIN structure inside a given Model.

Parameters:

str - the partial UPDATE string

model - the Model to operate on

Returns:

the new SPIN Query

setVarNamespace

public void setVarNamespace(String value)

Sets the variable namespace which is used to prevent the creation of too many blank nodes.

Parameters:

value - the new namespace (might be null)