nesstar.rdf
Interface RDFObj

All Known Implementing Classes:

Agreement, AgreementHome, AType, BasicObj, BooleanType, Catalog, Catalog, CatalogHome, CatalogHome, Category, CategoryStatistic, CategoryStatisticHome, CodeList, CodeListHome, CollectionType, Concept, ConceptHome, Cube, CubeHome, Datafile, DatafileHome, Dataset, DatasetEx, DatasetHome, DBSearchEx, DCResource, DCResourceHome, Dimension, DimensionHome, DoubleType, EGMSResource, EGMSResource2, EGMSResource2Ex, EGMSResource2Home, EGMSResourceHome, Event, EventHome, Explore, ExploreCube, ExploreCubeOp, ExploreEx, ExploreOp, Explorer, ExplorerHome, ExplorerOp, Factsheet, FactsheetHome, FileType, FloatType, FolderEx, GeoConcept, GeoConceptHome, GeographicalUnit, GeographicalUnitHome, IntegerType, IPISDataset, IPISDatasetHome, Learn, LearnOp, Measure, MeasureHome, Method, MethodInvocation, NSDStatEngine, NSDStatEngineHome, NSMethod, NSParameter, ObjectType, Operation, Organisation, OrganisationHome, PasswordType, Person, PersonHome, Project, ProjectHome, Purpose, PurposeHome, Range, RangeHome, RDFBag, RDFClass, RDFObject, RDFProperty, Resource, ResourceHome, Role, RoleHome, Row, RowHome, Search, SearchEx, SearchOp, Section, SectionHome, Series, SeriesHome, Server, Server, ServerEx, ServerHome, ServerHome, SimpleVariable, Statement, StatementHome, StatFormat, StatFormatHome, StringType, Study, Study2, Study2Home, Study3, Study3Home, StudyHome, Survey, SurveyHome, Table, TableHome, Term, TermHome, TestExploreCubeOp, TestTrendOp, Trend, TrendOp, Type, TypeHome, URLType, User, User, UserHome, Value, ValueDomain, ValueDomainHome, ValueHome, Variable, Variable, Variable2, Variable2Home, VariableGroup, VariableGroupHome, VariableHome, VariableHome, VoidType

public interface RDFObj

An RDF Object.

Each RDFObj represent an Internet resource (an HTML page, an object on a Nesstar Publisher, etc.).

Each RDFObj has:

• an ID (an URL) that is unique, immutable and indicates where the resource it to be found on the net
• a type or class
• a set of properties

Objects that implement RDFObj can have both 'hard' and 'soft' properties.

Hard properties are defined by couple of methods of the form: set_propertyName() and get_propertyName().

Soft properties are not declared explicitly and can be set and accessed using set(RDFProperty,Object), get(RDFProperty) and getBindings().

Each RDFObj is stored in a local db (an instance of RDFDB).

Created:

26 April 2002

Method Summary

Object	get(RDFProperty property)
Collection	getBindings()
RDFDB	getDB()
URL	getID()
RDFClass	getType() Returns the class/type for this object BUG: an RDF obj can have multiple classes
void	set(RDFProperty property, Object value)
void	setDB(RDFDB db) Set the DB into which the object is stored.
void	setID(URL id) Set the object ID.
void	setType(RDFClass s)

Method Detail

getID

URL getID()

Returns:

the immutable ID of the object

setID

void setID(URL id)
           throws Exception

Set the object ID.

Parameters:

id - the id

Throws:

Exception - should throw an exception if the ID has already been set

getDB

RDFDB getDB()

Returns:

the DB that contains the object

setDB

void setDB(RDFDB db)

Set the DB into which the object is stored.

Parameters:

db - The new dB value

getType

RDFClass getType()
                 throws Exception

Returns the class/type for this object BUG: an RDF obj can have multiple classes

Returns:

The type value

Throws:

Exception

setType

void setType(RDFClass s)

getBindings

Collection getBindings()

Returns:

additional 'soft' properties

set

void set(RDFProperty property,
         Object value)

get

Object get(RDFProperty property)
           throws Exception

Throws:

Exception