nesstar.rdf
Class RDFList

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractList
          nesstar.rdf.RDFList

All Implemented Interfaces:

Iterable, Collection, List

public class RDFList
extends AbstractList

A list of RDF objects. It provides mutable List interface on top of a bag.

Created:

26 April 2002

Bug:

10 July 2002 the toString() method causes a lookup for each object from the list, resulting in a quick and uncontrolled series of remote bean lookups, each time going through NEOOM2EJBServlet/BrigdeBean. This causes Tomcat to run out of available Threads before it has a chance to return the objects.

Method Summary

void	add(int index, Object element) Inserts the specified element at the specified position in this list Shifts the element currently at that position (if any) and any subsequent elements to the right (adds one to their indices).
void	clear() Removes all the elements in the bag.
Object	get(int index) Method
RDFBag	getBag()
URL	getID()
static RDFList	getList(RDFBag bag) Gets the list attribute of the RDFList class
static RDFList	getList(RDFRef ref)
void	reload() Reload the underlying Bag
Object	remove(int index) Removes the element at the specified position in this list.
Object	set(int index, Object element) Replaces the element at the specified position in this list with the specified element
int	size() Method

Methods inherited from class java.util.AbstractList

add, addAll, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, subList

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Method Detail

getBag

public RDFBag getBag()

getID

public URL getID()

set

public Object set(int index,
                  Object element)

Replaces the element at the specified position in this list with the specified element

Specified by:

set in interface List

Overrides:

set in class AbstractList

Parameters:

index - - index of element to replace.

element - - element to be stored at the specified position.

Returns:

the element previously at the specified position.

Throws:

ClassCastException - - if the specified element does not inherits from RDFObject

IndexOutOfBoundsException - - if the specified index is out of range (index < 0 || index >= size()).

getList

public static RDFList getList(RDFRef ref)
                       throws Exception

Parameters:

ref - the reference to a bag that represents a 1 to N relationship

Returns:

the RDFList that represents the relationship.

Throws:

Exception

getList

public static RDFList getList(RDFBag bag)
                       throws Exception

Gets the list attribute of the RDFList class

Parameters:

bag -

Returns:

The list value

Throws:

Exception

get

public Object get(int index)

Method

Specified by:

get in interface List

Specified by:

get in class AbstractList

Parameters:

index -

Returns:

reload

public void reload()
            throws Exception

Reload the underlying Bag

Throws:

Exception

size

public int size()

Method

Specified by:

size in interface Collection

Specified by:

size in interface List

Specified by:

size in class AbstractCollection

Returns:

add

public void add(int index,
                Object element)

Inserts the specified element at the specified position in this list Shifts the element currently at that position (if any) and any subsequent elements to the right (adds one to their indices).

Specified by:

add in interface List

Overrides:

add in class AbstractList

Parameters:

index - index at which the specified element is to be inserted.

element - element to be inserted.

Throws:

ClassCastException - - if the specified element does not inherits from RDFObject

IndexOutOfBoundsException - - if the specified index is out of range (index < 0 || index >= size()).

remove

public Object remove(int index)

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

Specified by:

remove in interface List

Overrides:

remove in class AbstractList

Parameters:

index - - the index of the element to remove.

Returns:

the element that was removed from the list.

clear

public void clear()

Removes all the elements in the bag.

Specified by:

clear in interface Collection

Specified by:

clear in interface List

Overrides:

clear in class AbstractList