Hi,
Thanks for the quick responses.
Helps a bunch.
Malik
--- In flexcoders@yahoogroups.com, "Paul Andrews" <[EMAIL PROTECTED]> wrote:
>
>
> ----- Original Message -----
> From: "malik_robinson" [EMAIL PROTECTED]
> To: flexcoders@yahoogroups.com
> Sent: Friday, July 28, 2006 12:18 AM
> Subject: [flexcoders] Can someone explain this code, its related to
> Cairngorm?
>
>
> > Hi,
> >
> > I am trying to understand the ModelLocator and how Cairngorm works.
> > I have been reading, but I think I need some additional information
> > on the code below if possible.
> >
> > 1. What is the difference between Public function and Public Static
> > function. I assume Public functions can be called from anywhere in
> > the application. But what about the "public static"
>
> When something is declared as static there can only be one class
instance.
> There's no need to instantiate the class as an object in order to call
a
> static function or access a public static member.
>
> >
> > 2. Any info about the ModelLocator would be helpful.
> >
> > [Bindable]
> > public class ModelLocator implements
> > com.adobe.cairngorm.model.ModelLocator
>
> This is the interface the class implements
>
> > {
> > private static var
> > modelLocator:code.model.ModelLocator;
>
> A class (static) variable for use by a class (static) function.
>
> > public static function getInstance() :
> > code.model.ModelLocator
>
> Call this to get the instance of the ModelLocator.
>
> > {
> > if ( modelLocator == null )
>
> If the ModelLocator has never been instantiated then create it,
otherwise
> return it.
> This inforces that only one ModelLocator instance exists - a
singleton.
>
> > modelLocator = new
> > code.model.ModelLocator();
> >
> > return modelLocator;
> > }
> >
> > //---------------------------------------------------
> > ----------------------
> >
> > public function ModelLocator()
>
> This is the Class constructor. If this is called and the reference to
the
> ModelLocator exists then something has gone wrong - the constructor is
> called by the static function above. If the constructor is called
twice
> there's a problem - there can only be one ModelLocator.
>
> > {
> > if ( code.model.ModelLocator.modelLocator !=
> > null )
> > throw new Error( "Only one
> > ModelLocator instance should be instantiated" );
> > }
> >
> > //---------------------------------------------------
> > ----------------------
> >
> > public function initialise() : void
> > {
> > }
> >
> > Thanks,
> >
> > Malik
>
>
>
> Hope that helps
>
> Paul
> >
> >
> >
> >
> >
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> >
> >
> >
> >
> >
>
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