Vincent Massol wrote:
> Actually, there is another example in the pdf book :
>
> if (initialized || disposed) {
> throw new IllegalStateException ("Illegal call");
> }
> if (null == this.manager) {
> this.manager = cmanager;
> }
>
> Is it the recommended way or do you usually assume that the lifecycle is
> enforced ? I have a feeling that you'll answer the following : it depends.
> If you're using excalibur component manager then you don't need these checks
> but if you're not using any component manager, you'd rather check. maybe not
> ... let's see ... :)
>
> In any case, I'd like to have your opinion.
Bottom line is this:
You should ALWAYS explicitly enforce your contracts. This leads to secure
components that cannot be interacted with in ways you had no intention of
allowing.
>
> -Vincent
>
> ----- Original Message -----
> From: "Vincent Massol" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, November 13, 2001 6:14 PM
> Subject: compose() method and developing with avalon pdf
>
>
>
>>Hi,
>>
>>In the developing with avalon pdf, there is an example of how to implement
>>the compose() method :
>>
>>public void compose(ComponentManager manager) throws ComponentException {
>> if (this.manager == null) {
>> this.manager = manager;
>> myGuard = (Guardian) this.manager.lookup(Guardian.ROLE);
>> }
>>}
>>
>>I'm wondering why there is a test to verify if the manager is not null
>>
> (i.e.
>
>>to verify if the compose() method has not already been called) ? I thought
>>that the lifecycle for composable would prevent this method being called
>>twice. Any reason ? If not, shouldn't we amend the doc, as most persons
>>
> will
>
>>use this doc as their starting point (as I am ... :) ).
>>
>>Thanks
>>-Vincent
>>
>>
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>
--
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