The ArrayList class is a simple implementation of IList
that uses a backing Array as the source of the data.
Items in the backing Array can be accessed and manipulated
using the methods and properties of the IList
interface. Operations on an ArrayList instance modify the
data source; for example, if you use the removeItemAt()
method on an ArrayList, you remove the item from the underlying
Array.
This base class will not throw ItemPendingErrors but it
is possible that a subclass might.
Dispatched when the IList has been updated in some way.
ArrayList
Property Detail
length
property
length:int [read-only]
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Get the number of items in the list. An ArrayList should always
know its length so it shouldn't return -1, though a subclass may
override that behavior.
This property can be used as the source for data binding.
Implementation public function get length():int
source
property
source:Array
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
The source array for this ArrayList.
Any changes done through the IList interface will be reflected in the
source array.
If no source array was supplied the ArrayList will create one internally.
Changes made directly to the underlying Array (e.g., calling
theList.source.pop() will not cause CollectionEvents
to be dispatched.
Implementation public function get source():Array public function set source(value:Array):void
uid
property
uid:String
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Provides access to the unique id for this list.
Implementation public function get uid():String public function set uid(value:String):void
Constructor Detail
ArrayList
()
Constructor
public function ArrayList(source:Array = null)
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Construct a new ArrayList using the specified array as its source.
If no source is specified an empty array will be used.
Parameters
source:Array (default = null) — The Array to use as a source for the ArrayList.
Adds a list of items to the current list, placing them at the end of
the list in the order they are passed.
Parameters
addList:IList — The list of items to add to the current list
addAllAt
()
method
public function addAllAt(addList:IList, index:int):void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Adds a list of items to the current list, placing them at the position
index passed in to the function. The items are placed at the index location
and placed in the order they are recieved.
Parameters
addList:IList — The list of items to add to the current list
index:int — The location of the current list to place the new items.
addItem
()
method
public function addItem(item:Object):void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Add the specified item to the end of the list.
Equivalent to addItemAt(item, length);
Parameters
item:Object — the item to add
addItemAt
()
method
public function addItemAt(item:Object, index:int):void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Add the item at the specified index.
Any item that was after this index is moved out by one.
Parameters
item:Object — the item to place at the index
index:int — the index at which to place the item
Throws
RangeError — if index is less than 0 or greater than the length
getItemAt
()
method
public function getItemAt(index:int, prefetch:int = 0):Object
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Get the item at the specified index.
Parameters
index:int — the index in the list from which to retrieve the item
prefetch:int (default = 0) — int indicating both the direction and amount of items
to fetch during the request should the item not be local.
Returns
Object — the item at that index, null if there is none
Throws
ItemPendingError — if the data for that index needs to be
loaded from a remote location
RangeError — if the index < 0 or index >= length
getItemIndex
()
method
public function getItemIndex(item:Object):int
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Return the index of the item if it is in the list such that
getItemAt(index) == item.
Note that in this implementation the search is linear and is therefore
O(n).
Parameters
item:Object — the item to find
Returns
int — the index of the item, -1 if the item is not in the list.
itemUpdated
()
method
public function itemUpdated(item:Object, property:Object = null, oldValue:Object = null, newValue:Object = null):void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Notify the view that an item has been updated.
This is useful if the contents of the view do not implement
IEventDispatcher.
If a property is specified the view may be able to optimize its
notification mechanism.
Otherwise it may choose to simply refresh the whole view.
Parameters
item:Object — The item within the view that was updated.
property:Object (default = null) — A String, QName, or int
specifying the property that was updated.
oldValue:Object (default = null) — The old value of that property.
(If property was null, this can be the old value of the item.)
newValue:Object (default = null) — The new value of that property.
(If property was null, there's no need to specify this
as the item is assumed to be the new value.)
Removes the specified item from this list, should it exist.
Parameters
item:Object — Object reference to the item that should be removed.
Returns
Boolean — Boolean indicating if the item was removed.
removeItemAt
()
method
public function removeItemAt(index:int):Object
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Remove the item at the specified index and return it.
Any items that were after this index are now one index earlier.
Parameters
index:int — The index from which to remove the item.
Returns
Object — The item that was removed.
Throws
RangeError — if index < 0 or index >= length.
setItemAt
()
method
public function setItemAt(item:Object, index:int):Object
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Place the item at the specified index.
If an item was already at that index the new item will replace it and it
will be returned.
Parameters
item:Object — the new value for the index
index:int — the index at which to place the item
Returns
Object — the item that was replaced, null if none
Throws
RangeError — if index is less than 0 or greater than or equal to length
startTrackUpdates
()
method
protected function startTrackUpdates(item:Object):void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
If the item is an IEventDispatcher, watch it for updates.
This method is called by the addItemAt() method,
and when the source is initially assigned.
Parameters
item:Object — The item passed to the addItemAt() method.
stopTrackUpdates
()
method
protected function stopTrackUpdates(item:Object):void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
If the item is an IEventDispatcher, stop watching it for updates.
This method is called by the removeItemAt() and
removeAll() methods, and before a new
source is assigned.
Parameters
item:Object — The item passed to the removeItemAt() method.
toArray
()
method
public function toArray():Array
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Return an Array that is populated in the same order as the IList
implementation.
Returns
Array — An Array populated in the same order as the IList
implementation.
Throws
ItemPendingError — if the data is not yet completely loaded
from a remote location
toJSON
()
method
public function toJSON(s:String):*
Language Version :
ActionScript 3.0
Product Version :
Apache Flex
Runtime Versions :
Flash Player 11, AIR 3.0
Converts an Array List to JavaScript Object Notation (JSON) format.
Called by the JSON.stringify() method and should not be called directly.
Parameters
s:String
Returns
*
toString
()
method
override public function toString():String
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Pretty prints the contents of this ArrayList to a string and returns it.
Returns
String — A String containing the contents of the ArrayList.
Dispatched when the IList has been updated in some way.
The CollectionEvent.COLLECTION_CHANGE constant defines the value of the
type property of the event object for an event that is
dispatched when a collection has changed.
The properties of the event object have the following values.
Not all properties are meaningful for all kinds of events.
See the detailed property descriptions for more information.
Property
Value
bubbles
false
cancelable
false
currentTarget
The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget.
items
An Array of objects with
information about the items affected by the event.
The contents of this field depend on the event kind;
for details see the items property
kind
The kind of event.
The valid values are defined in the CollectionEventKind
class as constants.
location
Location within the target collection
of the item(s) specified in the items property.
oldLocation
the previous location in the collection
of the item specified in the items property.
target
The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event.
flash.events.EventDispatcher