org.universAAL.middleware.owl

Class Intersection

java.lang.Object

org.universAAL.middleware.rdf.Resource

org.universAAL.middleware.owl.TypeExpression

org.universAAL.middleware.owl.Intersection

Direct Known Subclasses:

MergedRestriction

public class Intersection
extends TypeExpression

A TypeExpression that contains all individuals/literals that are in all of the given type expressions. Intersection corresponds to OWL ObjectIntersectionOf or DataIntersectionOf.

For example, Intersection(Enumeration(ex:Peter, a:Lois), Enumeration(ex:Paul, a:Lois)) contains the individual a:Lois, and
Intersection(Enumeration(1,2), Enumeration(2,3)) contains the integer two.

The given type expressions must not mix sets of individuals with sets of literals. For example, Intersection(Enumeration(ex:Peter), Enumeration(1)) is not possible, as it combines individuals (ex:Peter) with literals (1).

Author:

mtazari - Saied Tazari, Carsten Stockloew

Field Summary

Fields

Modifier and Type	Field and Description
static String	PROP_OWL_INTERSECTION_OF URI for owl:intersectionOf.
protected List<TypeExpression>	types The list of child type expressions.

Fields inherited from class org.universAAL.middleware.owl.TypeExpression

EXCEPTION_TTL, OWL_CLASS, OWL_NAMESPACE, PROP_RDFS_SUB_CLASS_OF, RDFS_DATATYPE, TYPE_OWL_THING

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
	Intersection() Constructor.
protected	Intersection(String[] additionalTypes) Constructor to create a new instance with some additional URIs to set as rdf:type.

Method Summary

Modifier and Type	Method and Description
boolean	addType(TypeExpression type) Add a new child type expression.
TypeExpression	copy() Create a copy of this object, i.e.
UnmodifiableResourceList	elements() Get an unmodifiable list of the child type expressions.
String[]	getNamedSuperclasses() Get the set of class URIs for all super classes of the individuals of this class expression.
Object[]	getUpperEnumeration() Each type expression can contain multiple objects; this method returns this set of objects.
boolean	hasMember(Object value, HashMap context, int ttl, List<MatchLogEntry> log) Returns true if the given object is a member of the class represented by this type expression, otherwise false.
boolean	isDisjointWith(TypeExpression other, HashMap context, int ttl, List<MatchLogEntry> log) Returns true if the given type expression has no member in common with the class represented by this type expression, otherwise false.
boolean	isWellFormed() Returns true, if the state of the resource is valid, otherwise false.
boolean	matches(TypeExpression subtype, HashMap context, int ttl, List<MatchLogEntry> log) Returns true if the given type expression is a subset of the class represented by this type expression, otherwise false.
boolean	setProperty(String propURI, Object o) Adds a statement with this resource as the subject, the given propURI as the predicate and the given value as the object.
int	size() Returns the number of elements in this intersection.
Iterator<TypeExpression>	types() Get an iterator for the child type expressions.

Methods inherited from class org.universAAL.middleware.owl.TypeExpression

checkTTL, collectTypesMinimized, getDefaultMatchmakingTTL, hasMember, hasMember, isDisjointWith, isDisjointWith, matches, matches, synchronize

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

addMultiLangProp, addType, asList, asList, asRDFList, changeProperty, copy, deepCopy, equals, generateAnonURI, getDefaultLang, getFilename, getLocalName, getMultiLangProp, getNamespace, getOrConstructLabel, getOrConstructLabel, getProperty, getPropertyURIs, getPropSerializationType, getResource, getResourceComment, getResourceLabel, getResourceLabel, getStaticFieldValue, getType, getTypes, getURI, hashCode, hasProperty, hasQualifiedName, isAnon, isAnon, isBlockingAddingTypes, isClosedCollection, isQualifiedName, literal, numberOfProperties, 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_OWL_INTERSECTION_OF

public static final String PROP_OWL_INTERSECTION_OF

URI for owl:intersectionOf.

See Also:

Constant Field Values

types

protected List<TypeExpression> types

The list of child type expressions.

Constructor Detail

Intersection

public Intersection()

Constructor.

Intersection

protected Intersection(String[] additionalTypes)

Constructor to create a new instance with some additional URIs to set as rdf:type.

Parameters:

additionalTypes - The additional type URIs to set as rdf:type.

Method Detail

addType

public boolean addType(TypeExpression type)

Add a new child type expression. If the given argument is an instance of Intersection, then the elements of that Intersection are added instead of the Intersection itself.

Parameters:

type - The type expression to add.

Returns:

true, if the given type expression could be added.

copy

public TypeExpression copy()

Description copied from class: TypeExpression

Create a copy of this object, i.e. create a new object of this class and copy the necessary properties.

Specified by:

copy in class TypeExpression

Returns:

The newly created copy.

getNamedSuperclasses

public String[] getNamedSuperclasses()

Description copied from class: TypeExpression

Get the set of class URIs for all super classes of the individuals of this class expression.

Specified by:

getNamedSuperclasses in class TypeExpression

getUpperEnumeration

public Object[] getUpperEnumeration()

Description copied from class: TypeExpression

Each type expression can contain multiple objects; this method returns this set of objects.

Specified by:

getUpperEnumeration in class TypeExpression

hasMember

public boolean hasMember(Object value,
                         HashMap context,
                         int ttl,
                         List<MatchLogEntry> log)

Description copied from class: TypeExpression

Returns true if the given object is a member of the class represented by this type expression, otherwise false. The context table maps the URIs of certain variables onto values currently assigned to them. The variables are either standard variables managed by the universAAL middleware or parameters of a specific service in whose context this method is called. Both the object whose membership is going to be checked and this type expression may contain references to such variables. If there is already a value assigned to such a referenced variable, it must be replaced by the associated value, otherwise this method may expand the context table by deriving a value for such unassigned but referenced variables with which the membership can be asserted. In case of returning true, the caller must check the size of the context table to see if new conditions are added in order for the membership to be asserted. If the context table is null, the method does a global and unconditional check.

Specified by:

hasMember in class TypeExpression

Parameters:

value - the object whose membership is going to be checked

context - context of the matchmaking. May be null.

ttl - time-to-live parameter

log - list that can be filled with log entries. May be null.

Returns:

true if the specified member is a member of this type expression

See Also:

org.universAAL.middleware.util.Constants#VAR_ACCESSING_BUS_MEMBER, org.universAAL.middleware.util.Constants#VAR_ACCESSING_HUMAN_USER, org.universAAL.middleware.util.Constants#VAR_CURRENT_DATETIME, org.universAAL.middleware.util.Constants#VAR_SERVICE_TO_SELECT

matches

public boolean matches(TypeExpression subtype,
                       HashMap context,
                       int ttl,
                       List<MatchLogEntry> log)

Description copied from class: TypeExpression

Returns true if the given type expression is a subset of the class represented by this type expression, otherwise false. The context table maps the URIs of certain variables onto values currently assigned to them. The variables are either standard variables managed by the universAAL middleware or parameters of a specific service in whose context this method is called. Both of the type expressions may contain references to such variables. If there is already a value assigned to such a referenced variable, it must be replaced by the associated value, otherwise this method may expand the context table by deriving a value for such unassigned but referenced variables with which the compatibility of the two classes can be asserted. In case of returning true, the caller must check the size of the context table to see if new conditions are added in order for the compatibility to be asserted. If the context table is null, the method does a global and unconditional check.

Specified by:

matches in class TypeExpression

Parameters:

subtype - the type expression with which the compatibility is going to be checked

context - context of the matchmaking. May be null.

ttl - time-to-live parameter

log - list that can be filled with log entries. May be null.

Returns:

true if the given type expression is a subset of the class represented by this type expression, otherwise false

See Also:

org.universAAL.middleware.util.Constants#VAR_ACCESSING_BUS_MEMBER, org.universAAL.middleware.util.Constants#VAR_ACCESSING_HUMAN_USER, org.universAAL.middleware.util.Constants#VAR_CURRENT_DATETIME, org.universAAL.middleware.util.Constants#VAR_SERVICE_TO_SELECT

isDisjointWith

public boolean isDisjointWith(TypeExpression other,
                              HashMap context,
                              int ttl,
                              List<MatchLogEntry> log)

Description copied from class: TypeExpression

Returns true if the given type expression has no member in common with the class represented by this type expression, otherwise false. The context table maps the URIs of certain variables onto values currently assigned to them. The variables are either standard variables managed by the universAAL middleware or parameters of a specific service in whose context this method is called. Both of the type expressions may contain references to such variables. If there is already a value assigned to such a referenced variable, it must be replaced by the associated value, otherwise this method may expand the context table by deriving a value for such unassigned but referenced variables with which the disjointness of the two classes can be asserted. In case of returning true, the caller must check the size of the context table to see if new conditions are added in order for the disjointness to be asserted. If the context table is null, the method does a global and unconditional check.

Specified by:

isDisjointWith in class TypeExpression

Parameters:

other - the type expression with which the disjointness is going to be checked

context - context of the matchmaking. May be null.

ttl - time-to-live parameter

log - list that can be filled with log entries. May be null.

Returns:

true if the given type expression has no member in common with the class represented by this type expression, otherwise false

See Also:

org.universAAL.middleware.util.Constants#VAR_ACCESSING_BUS_MEMBER, org.universAAL.middleware.util.Constants#VAR_ACCESSING_HUMAN_USER, org.universAAL.middleware.util.Constants#VAR_CURRENT_DATETIME, org.universAAL.middleware.util.Constants#VAR_SERVICE_TO_SELECT

isWellFormed

public boolean isWellFormed()

Description copied from class: TypeExpression

Returns true, if the state of the resource is valid, otherwise false. Redefined in this class as abstract to force subclasses to override it.

Specified by:

isWellFormed in class TypeExpression

See Also:

Resource.isWellFormed()

setProperty

public boolean setProperty(String propURI,
                           Object o)

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

types

public Iterator<TypeExpression> types()

Get an iterator for the child type expressions.

Returns:

an iterator for the child type expressions.

elements

public UnmodifiableResourceList elements()

Get an unmodifiable list of the child type expressions.

Returns:

an unmodifiable list of the child type expressions.

size

public int size()

Returns the number of elements in this intersection.

Returns:

the number of elements in this intersection.