org.ontoware.rdfreactor.runtime

Class Bridge

java.lang.Object

org.ontoware.rdfreactor.runtime.BridgeBase

org.ontoware.rdfreactor.runtime.Bridge

public class Bridge
extends BridgeBase

Runtime model for a java bean property For all getters and setters (and all other accessors): - if the object implements URIEntity it's mapped to rdf:Resource, - otherwise it's mapped to rdf:Literal by calling "toString" IMPROVE: better Literal handling?
RDF Reactor uses the following naming: resource - instance of an RDF schema class, identified by the resource ID (an URI or BlankNode), allmost all statements about the resource use the resource ID as the object property - a property belongs to a resource, represented by the predicate of a statement about a resource value - value of a property of a resource, represented by the object of the statement with the property as predicate and the resource ID as the subject

Author:

mvo

Constructor Summary

Constructors

Constructor and Description
Bridge()

Method Summary

Modifier and Type	Method and Description
static boolean	addValue(Model model, Resource o, URI propertyURI, Object value) Add a value to the property of an object after checking if the object already had the property with the same value.
static boolean	containsInstance(Model model, URI classURI) Check if the model contains an instance of the given RDFS/OWL schema class.
static Iterator<? extends Object>	getSparqlSelectSingleVariable(Model m, Class<?> returnType, String sparqlSelectQuery) Use a SPARQL query on the model and wrap the result in a SparlSingleVariableIterator, to ensure that only single elements are included in the result.
static boolean	isInstanceOf(Model model, Resource instanceID, URI classURI) Check if a resource is an instance of a given RDFS/OWL class.
static void	setAllValue(Model model, Resource subject, URI prop, Object[] o) Set the value of a property from a resource after removing all existing values of the property from that resource.
static void	setValue(Model model, Resource resourceObject, URI propertyURI, Object value) Set the value(s) of a property of an object, after removing all values of the property from the object
static boolean	updateValue(Model model, BlankNode blankNode, URI propertyURI, Object _old, Object _new) Update the value of a property from a resource.
static Boolean	updateValue(Model model, Resource resourceIdentifier, URI propertyURI, Object _old, Object _new) Update the value of a property from a resource.

Methods inherited from class org.ontoware.rdfreactor.runtime.BridgeBase

add, containsGivenValue, getAllInstances, getAllValues_asSet, getAllValues_Inverse, getAllValues, getSparqlSelect, getValue, removeAllValues

Methods inherited from class java.lang.Object

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

Constructor Detail

Bridge

public Bridge()

Method Detail

addValue

public static boolean addValue(Model model,
                               Resource o,
                               URI propertyURI,
                               Object value)
                        throws ModelRuntimeException

Add a value to the property of an object after checking if the object already had the property with the same value.

Parameters:

model - - the underlying RDF2Go model

o - - URI or BlankNode identifying the resource

propertyURI - - URI of the property

value - - value of the property

Returns:

true if value was already in the model

Throws:

ModelRuntimeException - ...

setValue

public static void setValue(Model model,
                            Resource resourceObject,
                            URI propertyURI,
                            Object value)

Set the value(s) of a property of an object, after removing all values of the property from the object

Parameters:

model - - the underlying RDF2Go model

resourceObject - - URI or BlankNode identifying the object

propertyURI - - URI of the resource

value - - value(s) of the property, may be an array

Throws:

ModelRuntimeException - ...

setAllValue

public static void setAllValue(Model model,
                               Resource subject,
                               URI prop,
                               Object[] o)
                        throws ModelRuntimeException

Set the value of a property from a resource after removing all existing values of the property from that resource.

Parameters:

model - - the underlying RDF2Go model

subject - - URI or BlankNode identifying the resource

prop - - URI of the property

o - - value of the property

Throws:

ModelRuntimeException - ...

updateValue

public static Boolean updateValue(Model model,
                                  Resource resourceIdentifier,
                                  URI propertyURI,
                                  Object _old,
                                  Object _new)
                           throws ModelRuntimeException

Update the value of a property from a resource. (Remove old value, add new value.)

Parameters:

model - - the underlying RDF2Go model

resourceIdentifier - - URI or BlankNode identifying the resource

propertyURI - - URI of the property

_old - - old value of the property

_new - - new value of the property

Returns:

true if the property really had the old value

Throws:

ModelRuntimeException - ...

updateValue

public static boolean updateValue(Model model,
                                  BlankNode blankNode,
                                  URI propertyURI,
                                  Object _old,
                                  Object _new)
                           throws ModelRuntimeException

Update the value of a property from a resource. (Remove old value, add new value.)

Parameters:

model - the underlying RDF2Go model

blankNode - BlankNode identifying the resource

propertyURI - URI of the property

_old - old value of the property

_new - new value of the property

Returns:

true if the property really had the old value

Throws:

ModelRuntimeException - ...

containsInstance

public static boolean containsInstance(Model model,
                                       URI classURI)

Check if the model contains an instance of the given RDFS/OWL schema class. It is assumed that every instance of a class has an accompanying triple of the form (instanceID, rdf:type, classURI) in the model.

Parameters:

model - - the underlying RDF2Go model

classURI - - URI of the RDFS/OWL schema class

Returns:

true if the model contains an instance of the class URI

isInstanceOf

public static boolean isInstanceOf(Model model,
                                   Resource instanceID,
                                   URI classURI)
                            throws ModelRuntimeException

Check if a resource is an instance of a given RDFS/OWL class.

Parameters:

model - - the underlying RDF2Go model

instanceID - - URI or BlankNode of the instance

classURI - - URI of the RDFS/OWL class

Returns:

true if the model contains the triple (instanceID; rdf:type, classURI)

Throws:

ModelRuntimeException - ...

getSparqlSelectSingleVariable

public static Iterator<? extends Object> getSparqlSelectSingleVariable(Model m,
                                                                       Class<?> returnType,
                                                                       String sparqlSelectQuery)
                                                                throws ModelRuntimeException

Use a SPARQL query on the model and wrap the result in a SparlSingleVariableIterator, to ensure that only single elements are included in the result. Assume 'x' as variable name.

Parameters:

m - - the underlying RDF2Go model

returnType - - the desired Java return type

sparqlSelectQuery - - the SPARQL query string

Returns:

SparqlSingleVariableIterator wrapper around the SPARQL query result

Throws:

ModelRuntimeException - ...