nesstar.rdf
Class RDFBag

java.lang.Object
  java.util.Observable
      nesstar.rdf.RDFObject
          nesstar.rdf.RDFBag

All Implemented Interfaces:

Comparable, RDFObj

public class RDFBag
extends RDFObject

A Bag of RDF objects.

BUG: we assume that it contains only references to objects, there is no handling of strings or other simple types.

Created:

26 April 2002

Field Summary

Fields inherited from class nesstar.rdf.RDFObject

COLSEP, IS_GETTER, IS_PART, IS_PART_OF, WRITE_OP

Constructor Summary

RDFBag(RDFDB db)
Constructor for the RDFBag object

RDFBag(RDFDB db, URL id)
Constructor for the RDFBag object

Method Summary

void	add(int index, RDFObject element) Method
void	add(Object[] objs) Method
void	add(RDFObject obj) Method
void	clear() Method
boolean	contains(URL url)
static void	dbg(String msg) Method
Object	get(int index)
static RDFBag	getBag(RDFDB db, URL id) Gets the bag attribute of the RDFBag class
Object	getN(int n) Gets the n attribute of the RDFBag object
int	getNSize() Gets the nSize attribute of the RDFBag object
Object[]	getObjs() Gets the objs attribute of the RDFBag object
static Object[]	getObjs(Object[] refs)
static Object[]	getObjs(RDFRef ref) Gets the objs attribute of the RDFBag class
static Object[]	getObjs(Vector refs) Gets the objs attribute of the RDFBag class
void	reload() Description of the Method
Object	remove(int index) Removes the element at the specified position in this list.
Object	set(int index, RDFObject obj) Method
void	setN(Integer n, RDFRef ref) Sets the n attribute of the RDFBag object

Methods inherited from class nesstar.rdf.RDFObject

AddProperty, AddStringProperty, chkFinal, compareTo, equals, err, err, get_comment, get_creationDate, get_label, get, getAccessCondition, getBinding, getBindings, getBookmarkLabel, getCollectionURL, getComment, getCreationDate, getDB, getDescriptor, getDescriptor, getDomain, getGetterMethods, getID, getInitialisedProperties, getInternalID, getLabel, getLastClear, getPartsDescriptor, getPartsDescriptor, getPartsDescriptor, getPath, getProperties, GetProperties, GetProperty, GetPropertyStatement, GetPropertyStatements, getRange, getRangeType, getRef, getRef, getServer, getShortId, getShortID, getStatementHome, GetStringProperties, GetStringProperty, getTimeoutInSecs, getType, init, init, initialised, isComplete, isLocal, isMeta, isStale, loaded, neededCollectionReload, neededReload, neededReload, neededReload, neededReload, needsReload, remove, set_comment, set_complete, set_creationDate, set_label, set, setComment, setComplete, setCreationDate, setDB, setHardOrSoft, setID, setLabel, setLastClear, SetProperty, setServer, SetStringProperty, setTimeoutInSecs, setTimestamp, setType, setTypeID, stale, toRDF, toRDFWrapped, toString, update

Methods inherited from class java.util.Observable

addObserver, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RDFBag

public RDFBag(RDFDB db,
              URL id)
       throws Exception

Constructor for the RDFBag object

Parameters:

db -

id -

Throws:

Exception

RDFBag

public RDFBag(RDFDB db)
       throws Exception

Constructor for the RDFBag object

Parameters:

db -

Throws:

Exception

Method Detail

setN

public void setN(Integer n,
                 RDFRef ref)

Sets the n attribute of the RDFBag object

Parameters:

n - The new n value

ref - The new n value

set

public Object set(int index,
                  RDFObject obj)
           throws Exception

Method

Parameters:

index -

obj -

Returns:

Throws:

Exception

get

public Object get(int index)
           throws Exception

Throws:

Exception

getBag

public static RDFBag getBag(RDFDB db,
                            URL id)
                     throws Exception

Gets the bag attribute of the RDFBag class

Parameters:

db -

id -

Returns:

The bag value

Throws:

Exception

getN

public Object getN(int n)

Gets the n attribute of the RDFBag object

Parameters:

n -

Returns:

The n value

getNSize

public int getNSize()

Gets the nSize attribute of the RDFBag object

Returns:

The nSize value

getObjs

public Object[] getObjs()
                 throws Exception

Gets the objs attribute of the RDFBag object

Returns:

The objs value

Throws:

Exception

getObjs

public static Object[] getObjs(Object[] refs)
                        throws Exception

Parameters:

refs - the references to be resolved

Returns:

the objects to which the references point

Throws:

Exception

getObjs

public static Object[] getObjs(Vector refs)
                        throws Exception

Gets the objs attribute of the RDFBag class

Parameters:

refs -

Returns:

The objs value

Throws:

Exception

getObjs

public static Object[] getObjs(RDFRef ref)
                        throws Exception

Gets the objs attribute of the RDFBag class

Parameters:

ref -

Returns:

The objs value

Throws:

Exception

dbg

public static void dbg(String msg)

Method

Parameters:

msg -

clear

public void clear()

Method

Overrides:

clear in class RDFObject

add

public void add(RDFObject obj)
         throws Exception

Method

Parameters:

obj -

Throws:

Exception

add

public void add(Object[] objs)
         throws Exception

Method

Parameters:

objs -

Throws:

Exception

contains

public boolean contains(URL url)

Parameters:

url -

Returns:

true if url is in the Bag

add

public void add(int index,
                RDFObject element)
         throws Exception

Method

Parameters:

index -

element -

Throws:

Exception

remove

public Object remove(int index)

Removes the element at the specified position in this list. Shifts any subsequent elements to the lefta (subtracts one from their indices).

Parameters:

index - - the index of the element to remove.

Returns:

the element that was removed from the list.

reload

public void reload()
            throws Exception

Description of the Method

Overrides:

reload in class RDFObject

Throws:

Exception