On 3/23/08, Jeroen Beckers <[EMAIL PROTECTED]> wrote:
[snip]
> If I want to analyze a list of items, those items must implement the correct
> interface, according to which analyzers you have added to the class. Fe:
>
> var myClass:AnalyzerBundle = new AnalyzerBundle();
> myClass.addAnalyzer(new HeightAnalyzer());
> myClass.addAnalyzer(new LevelAnalyzer());
> myClass.analyze(new Array(item1, item2, item3));
>
> What I am looking for now, is a way to make sure that item1, item2 and item3
> all implement the IHeightItem and ILevelItem interfaces.
[snip]
There's no compile time way to do this. I would implement a
targetInterface property as part of the IAnalyzer interface.
interface IAnalyzer
{
function get targetInterface():Class;
...
}
Then, in the analyze method, I'd verify the items before passing them
to the analyzers. If the verification fails, throw an error.
public function analyze(list:Array):void
{
for each (var item:Object in list)
for each (var analyzer:IAnalyzer in analyzers)
if (!(item is analyzer.targetInterface))
throw new Error("&[EMAIL PROTECTED]");
...
}
It also depends on whether your analyzers are supposed to be able to
deal with items that don't implement their iterfaces. Can't they
simply ignore those items?
