org.netbeans.mdr.persistence.btreeimpl.btreestorage

Class VirtualList

java.lang.Object

java.util.AbstractCollection

java.util.AbstractList

org.netbeans.mdr.persistence.btreeimpl.btreestorage.VirtualList

All Implemented Interfaces:

java.lang.Iterable, java.util.Collection, java.util.List

public class VirtualList
extends java.util.AbstractList

An implementation of List which uses a btree database as a backing store. This allows arrays which which not otherwise fit in memory. To use a Virtual List:

1. First create it with VirtualList(String name). This will create a btree database with the given name to hold the list elements.
2. After an entry changes, call VirtualList.changed(index) to ensure that the changed version is written out to the repository.
3. When done, call VirtualArray.delete() to delete the backing repository

Note that objects in the list must be Streamable.

Field Summary

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor and Description
VirtualList(java.util.Map properties, ObjectResolver resolver)
VirtualList(java.lang.String fileName, ObjectResolver resolver) Create a VirtualList

Method Summary

Methods

Modifier and Type	Method and Description
void	add(int index, java.lang.Object element) Add a new element to the list
void	changed(int index) mark the elemenet at the given index changed
void	delete() Delete the VirtualList's backing repository
java.lang.Object	get(int index) Get the specified element
java.lang.Object	remove(int index) Remove ana element from the list
java.lang.Object	set(int index, java.lang.Object element) Set the element at the specified index
int	size() Get the number of elements in the list

Methods inherited from class java.util.AbstractList

add, addAll, clear, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, removeRange, 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

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

Methods inherited from interface java.util.List

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

Constructor Detail

VirtualList

public VirtualList(java.lang.String fileName,
           ObjectResolver resolver)

Create a VirtualList

Parameters:

nm - The name of the btree repository to create

VirtualList

public VirtualList(java.util.Map properties,
           ObjectResolver resolver)

Method Detail

delete

public void delete()

Delete the VirtualList's backing repository

get

public java.lang.Object get(int index)

Get the specified element

Specified by:

get in interface java.util.List

Specified by:

get in class java.util.AbstractList

Parameters:

index - The index of the element to get

Returns:

the element at the specified index

size

public int size()

Get the number of elements in the list

Specified by:

size in interface java.util.Collection

Specified by:

size in interface java.util.List

Specified by:

size in class java.util.AbstractCollection

set

public java.lang.Object set(int index,
                   java.lang.Object element)

Set the element at the specified index

Specified by:

set in interface java.util.List

Overrides:

set in class java.util.AbstractList

Parameters:

index - the index to set

element - the element to set the index to

Returns:

the element formerly at that index

add

public void add(int index,
       java.lang.Object element)

Add a new element to the list

Specified by:

add in interface java.util.List

Overrides:

add in class java.util.AbstractList

Parameters:

the - index at which to ass it

element - the element to add

remove

public java.lang.Object remove(int index)

Remove ana element from the list

Specified by:

remove in interface java.util.List

Overrides:

remove in class java.util.AbstractList

Parameters:

index - Where to remove the element

Returns:

the element removed.

changed

public void changed(int index)

mark the elemenet at the given index changed

Parameters:

the - index of the changed element.