ActionScript 3 :: Check If Class Implements Specific Interface
Sep 7, 2011
In ActionScript 3.0, there are a few ways to check a class's extension. For example, if I want to know of a custom class extends Sprite I could use the is operator:
trace(MyClass is Sprite);
Or I could use flash.utils.getQualifiedSuperclassName:
trace(getQualifiedSuperclassName(MyClass));
I would like to accept a class as an argument and check to see if the passed class implements an certain interface. Is there an equally simple or common way to check if my custom class adheres to an interface? Perhaps something like:
trace(MyClass implements IMyInterface);
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Similar Posts:
Feb 17, 2011
Is there a way to generate an instance of a class that implements an interface based on the name of the class?
I am trying:
var ClassReference:Object = getDefinitionByName("movement.OuterSpaceMovement") as IMovement;
var m:IMovement = new ClassReference as IMovement;
trace("startup..." + m);
-But I am getting an error message ReferenceError: Error #1065 (OuterSpaceMovement) not defined.
I have several classes that implement the same interface (IMovement) but I need to be able to generate new instances of these classes and then pass these instances as a datatype (IMovement datatype) to other classes...
So then I tried:
var ClassReference:Class = getDefinitionByName("OuterSpaceMovement") as Class;
var m:IMovement = new ClassReference() as IMovement;
and this doesn't seem to work...but the following
var m:IMovement = new OuterSpaceMovement();
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Mar 13, 2011
I'm trying to load a RSL library into a flash animation developed with Flash CS5 IDE, that extends a custom class and implements an interface. I have reduced the problem to the simplest setup and find that I can have my main class extend another class or implement an interface, but not do both at the same time if I want to load an RSL.I have a very simple class to extend:
import flash.display.Sprite;
public class MySprite extends Sprite
{[ code]...........
but if I want both I get the VerifyError: Error #1014 with MySprite not found and ReferenceError: Error #1065.
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Mar 25, 2010
With this code
function someFunction(classParam:Class):Boolean
{
// how to know if classParam implements some interface?
}
i.e. Comparing classParam with IEventDispatcher interface
[Code]...
There is a way that DOES NOT USE describeType or creates a new operator?
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Jan 18, 2011
How can I test if a class reference implements an interface? Note that the is and instanceof operators do not work with Class references.
Example:
public function set someClassref(value:Class):void
{
if(value is IMyInterface)[code]........
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Apr 29, 2011
Not sure if this is possible but I would like to reflect a swf or swc file selected by the user at runtime to find any classes that implement a certain interface. Can this be done or do you actually need a reference to the class you want to reflect using describeType();
Note - this would be done in actionscript.
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Sep 3, 2009
I am overriding the addItem() function of an array collection and I would like to detect if the added item implements a particular interface. Previously I used the, is operator to detect the class type, but now that I am using an interface for classes I would rather test to see if the object implements the interface. I expect I could just try and cast the object as the interface and see if it's not null. Is this the best way to do it? I could also just create a new addFunction() that only accepts objects of the interface type.
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Apr 8, 2010
Is there any non-hacky way to determine wether a class' superclass implements a particular interface?
For example, assume I've got:
class A extends EventDispatcher implements StuffHolder {
protected function get myStuff():Stuff { ... };
public function getStuff():Array {
[Code].....
How could I perform that super is StuffHolder test in a way that, well, works? In this case, it always returns true.
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Apr 20, 2011
We've been developing an affiliate system and would like to detect somehow that a compiled, SWF advert implements clickTAG or not. Is there any way to automate this process?
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Aug 19, 2010
recently, I research for the collection framework, and find LinkedSet(AS3Commons collection framework,it is a good opensource framework) written in ActionScript, but it can't use as dataProvider in ComboBox or DataGrid, because only implements ICollectionView can use as dataProvider. So I want to try if a class implements ICollectionView can work or not. I know Flex has build-in class implements ICollectionView, but I only want to define a class not use build-in class. The class as simple as possible.(can work is enough)
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Sep 7, 2007
i am working on a project where i have some common code which i import in different movie clips and different files the code is in actionscript 2 in an external .as file. this is not a class its just a bucnh of functions and temporary variables.Problem is when i use the check syntax button or auto format button i get the following error."ActionScript 2.0 class scripts may only define class or interface constructs."this used to work fine in flash 8 but it always gives this error since i started using flash 9.the code works fine too. its just that my auto format button and the check syntax doesn't work.
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Sep 17, 2009
I want to make an object move by 5 every second the right key is down. How can i do this in as3?
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Jul 11, 2011
I'm trying to see if a specific date has passed but it's not working.
Here's my PHP Code:
var currDate:Date = new Date();
checkIfDateHasPassed = function(y, m, d){
var myDate:Date = new Date(y, m, d);
if(myDate > currDate){
trace("still to come");
} else {
trace("has passed");
}}// since month starts in Zero, July will be 6 instead 7
// I'm trying to use yesterday, but its not working...checkIfDateHasPassed(2011, 6, 10);
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Aug 13, 2006
i have incuded an AS file in my fla. But is gives an error ball.as: Line 73: ActionScript 2.0 class scripts may only define class or interface constructs.
[Code]...
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Apr 20, 2009
I'm trying to publish a swf with Flash CS3.
I have one .fla file and two .as files. I think my problem is I don't know how to set the path for the action scripts. All three files are in the same directory
The files:
dtd.fla
TransformItem.as
TransformManager.as
The error: The class or interface 'gs.TransformManager' could not be loaded.
dtd.fla code appears to have an appropriate import: import gs.TransformManager; var manager_obj = new TransformManager([], onTransformEvent, true, false, false, false, false, true, true);
TransformManager.as code appears to have an appropriate import: import gs.TransformItem;
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Jan 11, 2011
Is it possible?
I am talking about special character, "|" to be exact.
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Jan 23, 2007
i jus want to know how do u check a specific cell for data say if its at row[1] and column[2].
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Dec 13, 2010
i'm trying to check if a movieclip has an event listener with a sepecific function bound to it. The hasEventListener function only accepts one parameter (the listener). What i would need would be an hasEventListener that accepts a second parameter, namely the function that is bound to it.
Code:
if (!mc.hasEventListener(MouseEvent.ROLL_OVER) {
mc.addEventListener(MouseEvent.ROLL_OVER, overHandler);
}
but what i would need is:
Code:
if (!mc.hasEventListener(MouseEvent.ROLL_OVER, overHandler) {
mc.addEventListener(MouseEvent.ROLL_OVER, overHandler);
}
because i bind more than one ROLL_OVER listeners to that mc.
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Nov 30, 2009
I'm doing a simple link code. I've tried many diferrent ways to do this but this error keeps comming up saying The class or interface could not be loaded...
home_btn.addEventListener(MouseEvent.CLICK, gotoURL);
function gotoURL(event:MouseEvent):Void{
navigateToURL(new URLRequest("my site"));}
This is the most recent method I've tried in doing this. I've tried changing the publishing settings of the document to and from Action Script 3.0- using an import command. But thats too complicated.
Attachments: Flashfla.fla.zip (767.8 K)
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Feb 3, 2012
Can I implement more than one interface to the same class?One option is to make interface A extend interface B and than have my class inplementing interface A. Is there any other way that I can implement two or more interfaces directly to the same class?
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Dec 30, 2009
Quick question. Does a class have to implement a interface directly to be accepted, or can it be a child of a parent class that implements it. so If I pass a child object into a method that only accepts IOBJECT, but the child class parent implements IOBJECT. will child object be accepted ?
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Sep 11, 2011
I have created the following classes for sharing images. They implement an interface, but I need a way of switching between them with user interaction. I've done it the following way:As you can see, service 1 and service 2 implement iSharingServices, and inherit from PolimorphSharing.PolimorphSharing is simply and an abstract class that implements the methods I want public from Service 1 and Service 2. Those methods will then be overridden on the Service 1 and Service 2. Because I need a way to switch the service in runtime, I've created a gateway class that inherits from PolimorphSharing. I can then call it the following way:
private var sharingService:PolimorphSharing = new SharingServicesGW('svc1').createService();
This all works flawlessly, and I can now switch between services with no problem whatsoever. However, I feel there's something wrong about it, so I would like to ask you guys for some advice on how to better implement this.
UPDATE:
Just adding some more insight to this. Basically the idea here is for my client to be able to upload images with various different public sharing services such as imageshack, imgur etc. I want my client to be able to select the service in which the image is to be published to (hence the "switching between them with user interaction" bit of the question.
The method that does the uploading bit, is requestShareImage(), processResults() simply turns whatever gets returned to a unique format, so my client can read off it always the same way. getObject() is my accessor, and onIOError will handle exceptions with any of the public API's
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Jul 30, 2010
I got the error message below when I try to put them onto my own flash file, The source codes work well by themselves.The class or interface 'URLLoader' could not be loaded.The class or interface 'URLRequest' could not be loaded.
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Jun 11, 2011
I am getting an error with RegExp class at my flash document. I am using an Action Script 2.0 at my document. Is RegExp class is not supported in AS1/AS2 ?
My code is as follows
function validateEmailAddress(emailString:String):Boolean {
var myRegEx:RegExp = /(w|[_.-])+@((w|-)+.)+w{2,4}+/;
var myResult:Object = myRegEx.exec(emailString);
if(myResult == null) {return false;}return true;
} if(validateEmailAddress(email) == false) {
contacterror = "Error ! Please Enter Valid Email Address";}
If RegExp not supported in ActionScript 2.0 then how to validate email address at ActionScript 2.0 ?
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Dec 30, 2009
I am creating objects for a game, they are all sprites. but I also want them to implement an interface. Is it possible to do both ? If not, how can i have an object have the capabilities of a sprite and also have it implement an interface. I am wanting to create another class that checks all my objects to see what datatype they are and evaluate them accordingly
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Jun 16, 2011
I have an older site that is coded in AS2(I can't get it to AS3 sorry) I found this script online that allows for mouse scrolling. It is in AS3 and I can't figure out what Event replaced in AS2. I'm sure there are much better AS programmers than me that could tell me off the bat. I'm just trying to get this converted to AS2.
var verticalCenter:Number = stage.stageHeight / 2;
var limit:Number = stage.stageHeight - content_mc.height;
var speed:Number = 0.1;
[Code]....
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Oct 10, 2011
As in Java I want to know if my reference is declared as Interface.
function foo(classRef:Class){
if(classRef.isInterface(){
//something
[code].....
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Feb 2, 2009
whats the purpose of having to have an extra class such as abstract class in Flash where the methods has no implementation,but the subclasses declare those implementations.The advantage of having the methods declared in subclass than the superclass is that it would not affect the other subclasses when there are certain changes.That makes me wonder, isn't it better not to extend(inherit) empty methods but directly create a class as its own? unless there is something that the child could use from parent.Anyone could give me examples of how applicable using abstract classes/interfaces?
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Jan 30, 2012
I am currently doing this gallery with prev and next button.But i got this error message.."The class or interface of MouseEvent could not be loaded." [code]
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Sep 22, 2011
How can I check if the stage contains a movieclip on a specific x and y location on the stage?I'm building a colour-guessing game. The purpose is to walk a path through a generated field of hexagons, each assigned a random colour (yellow, red, blue or green), based on what soundfile you hear. So if you hear "yellow", you have to click a yellow tile etc.But because I want it to be a path, and the colours of the tiles are randomly generated, I have to check which colours border the currently active tile. I literally have no idea how to do this. I thought this might work but it doesnt:
if ((this.tile.y == (event.currentTarget.y - 64)) != null) {
//add the colour of this tile to array
}
[code].....
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