org.universAAL.middleware.rdf

Class Property

java.lang.Object

org.universAAL.middleware.rdf.Resource

org.universAAL.middleware.rdf.FinalizedResource

org.universAAL.middleware.rdf.Property

Direct Known Subclasses:

DatatypeProperty, ObjectProperty

public abstract class Property
extends FinalizedResource

Definition of an RDF property. The creation is separated from the usage; for every Property there is exactly one PropertySetup where all the characteristics of this property are defined.

Author:

Carsten Stockloew

See Also:

ObjectProperty, ObjectPropertySetup, DatatypeProperty, DatatypePropertySetup, PropertySetup

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	Property.PrivatePropertySetup Implementation of the setup interface.

Field Summary

Fields

Modifier and Type	Field and Description
protected OntClassInfo	info The ontology that defines this property.
protected boolean	isFunctional Determines whether this property is functional.
static String	PROP_RDFS_DOMAIN URI of rdfs:domain that is used to state that any resource that has a given property is an instance of one or more classes.
static String	PROP_RDFS_RANGE URI of rdfs:range that is used to state that the values of a property are instances of one or more classes.
protected Property.PrivatePropertySetup	setup The setup interface.
static String	TYPE_FUNCTIONAL

Fields inherited from class org.universAAL.middleware.rdf.Resource

ANON_URI_PREFIX, blockAddingTypes, isXMLLiteral, NAMESPACE_PREFIX, ns_delim_index, PROP_INVOLVED_HUMAN_USER, PROP_RDF_FIRST, PROP_RDF_REST, PROP_RDF_TYPE, PROP_RDFS_COMMENT, PROP_RDFS_LABEL, PROP_SERIALIZATION_FULL, PROP_SERIALIZATION_OPTIONAL, PROP_SERIALIZATION_REDUCED, PROP_SERIALIZATION_UNDEFINED, props, RDF_EMPTY_LIST, RDF_NAMESPACE, RDFS_NAMESPACE, SERVICE_NAMESPACE, TYPE_RDF_LIST, TYPE_RDFS_CLASS, uri, VOCABULARY_NAMESPACE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Property(String uri, OntClassInfo info) Protected constructor, to create instances call either ObjectProperty#create(String, OntClassInfo) or DatatypeProperty#create(String, OntClassInfo).

Method Summary

Modifier and Type	Method and Description
protected boolean	containsType(String type, Object value)
boolean	isFunctional() Determines whether this property is functional.
boolean	setProperty(String propURI, Object value) Adds a statement with this resource as the subject, the given propURI as the predicate and the given value as the object.

Methods inherited from class org.universAAL.middleware.rdf.FinalizedResource

addType, getLocalName, getNamespace, getProperty, getPropertyURIs, getType, getTypes, getURI, hasQualifiedName, isAnon, numberOfProperties

Methods inherited from class org.universAAL.middleware.rdf.Resource

addMultiLangProp, asList, asList, asRDFList, changeProperty, copy, deepCopy, equals, generateAnonURI, getDefaultLang, getFilename, getMultiLangProp, getOrConstructLabel, getOrConstructLabel, getPropSerializationType, getResource, getResourceComment, getResourceLabel, getResourceLabel, getStaticFieldValue, hashCode, hasProperty, isAnon, isBlockingAddingTypes, isClosedCollection, isQualifiedName, isWellFormed, literal, representsQualifiedURI, serializesAsXMLLiteral, setPropertyPath, setPropertyPath, setPropertyPathFromOffset, setResourceComment, setResourceLabel, toString, toStringRecursive, toStringRecursive, unliteral

Methods inherited from class java.lang.Object

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

Field Detail

PROP_RDFS_DOMAIN

public static final String PROP_RDFS_DOMAIN

URI of rdfs:domain that is used to state that any resource that has a given property is an instance of one or more classes.

See Also:

Constant Field Values

PROP_RDFS_RANGE

public static final String PROP_RDFS_RANGE

URI of rdfs:range that is used to state that the values of a property are instances of one or more classes.

See Also:

Constant Field Values

TYPE_FUNCTIONAL

public static final String TYPE_FUNCTIONAL

See Also:

PropertySetup.setFunctional(), Constant Field Values

isFunctional

protected boolean isFunctional

Determines whether this property is functional.

info

protected OntClassInfo info

The ontology that defines this property.

setup

protected Property.PrivatePropertySetup setup

The setup interface.

Constructor Detail

Property

protected Property(String uri,
                   OntClassInfo info)

Protected constructor, to create instances call either ObjectProperty#create(String, OntClassInfo) or DatatypeProperty#create(String, OntClassInfo).

Parameters:

uri - URI of this property.

info - The class for which this property is defined.

Method Detail

isFunctional

public boolean isFunctional()

Determines whether this property is functional.

See Also:

PropertySetup.setFunctional()

setProperty

public boolean setProperty(String propURI,
                           Object value)

Description copied from class: Resource

Adds a statement with this resource as the subject, the given propURI as the predicate and the given value as the object. Subclasses must override this in order to decide if the statement to be added fits the general class constraints. If not, the call of this method should be ignored. For each property only one single call may be made to this method, unless subsequent calls to this method for setting the value of the same property are treated as an update for an update-able property. Multi-valued properties must be set using an instance of List. The differentiation, if a such list should be treated as an rdf:List, can be made with the help of Resource.isClosedCollection(String). The default implementation here accepts all property-value pairs blindly except for rdf:type which is handled if the value is a type URI, a Resource or a java.util.List of them.

Note: The setting of the property rdf:type is being handled by this class via the final methods Resource.addType(String, boolean), Resource.getType(), and Resource.getTypes(). Although these methods give the view of handling type URIs as strings, but in reality the types are stored as direct instances of this class. So, the subclasses should ignore calls for setting rdf:type; if not, then the subclass must pay attention that the value should be a List of direct instances of this class so that (1) the Resource.toString() method returns just the URI and (2) the serializers get no problems with the value. Also, settings via subclasses may be overwritten by this class if a subsequent call to Resource.addType(String, boolean) is made.

Overrides:

setProperty in class Resource

Returns:

true if the property changed as a result of the call

containsType

protected boolean containsType(String type,
                               Object value)