ActionScript - Instantiate New Object From Instance?

Question

how can i instantiate another class object from a class instance?

in the code below (which doesn't work) i'd like the function to return a new class instance based the passed argument's class. in other words, i want the function to return a new instance of MySprite without having to call new MySprite();.

var mySprite:Sprite = new MySprite();
var anotherSprite:Sprite = makeAnotherSprite(mySprite);

function makeAnotherSprite(instance:Sprite):Sprite
    {
    return new getDefinitionByName(getQualifiedClassName(instance));
    }

Gerhard Schlager · Accepted Answer · 2011-03-23 14:25:16Z

3

Your solution did almost work. Here's the corrected function:

function makeAnotherSprite(instance:Sprite):Sprite
{
    var qualifiedClassName:String = getQualifiedClassName(instance);
    var clazz:Class = getDefinitionByName(qualifiedClassName) as Class; 
    return new clazz();
}

answered Mar 23, 2011 at 14:25

Gerhard Schlager

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Comments

Sam · Accepted Answer · 2011-03-23 14:34:46Z

1

An alternative way than what you're trying to do, but should work.

function makeAnotherSprite(instance:Sprite):Sprite
{
var myClass:Class = Object(instance).constructor; 
return new myClass();
}

answered Mar 23, 2011 at 14:34

Sam

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1 Comment

Chunky Chunk Over a year ago

nice! i forgot all about using the constructor property. this is much cleaner than having to use the flash.utils static functions. thanks!

Manish · Accepted Answer · 2011-03-23 14:40:21Z

0

Make that:

return new (getDefinitionByName(getQualifiedClassName(instance)))();

(Brackets)

answered Mar 23, 2011 at 14:40

Manish

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