nested contexts hierarchy

[Marcin Skladaniec <ma...@ish.com.au>]

Hi

How do I test whether a context is a child of another one? 
I looked up the javadocs and code for this functionality, 
but I failed to find any. The relationship between 
contexts seems to be resolved on DataChannel level, but I 
cannot grasp how it actually happens.
I think methods like getParentContext() and 
getChildContexts() can be useful.

Best regards
Marcin

Re: nested contexts hierarchy

[Marcin Skladaniec <ma...@ish.com.au>]

On Wed, 14 Jan 2009 10:53:51 +0200
  Andrus Adamchik <an...@objectstyle.org> wrote:
>> getParentContext()
> 
> Parent context is a DataChannel of a child, so 
>getChannel() would  return a parent DataContext in case 
>of a nested context and DataDomain  in case of a 
>top-level context.
thank you, that was what I did not understand.
> 
>> getChildContexts()
> 
> Context doesn't track its child contexts, only 
>indirectly via event  manager. If somebody describes a 
>case of why enumerating through a  context children might 
>be useful (other then sending events, which is  already 
>implemented), we may add it, storing children via weak 
> references to avoid introducing a requirement of 
>explicitly closing  the child context.
indeed, I cannot think about the use of it now.
Thank you for help.
Marcin

> 
> Andrus
> 
> 
> On Jan 14, 2009, at 3:52 AM, Marcin Skladaniec wrote:
> 
>> Hi
>>
>> How do I test whether a context is a child of another 
>>one? I looked  
>> up the javadocs and code for this functionality, but I 
>>failed to  
>> find any. The relationship between contexts seems to be 
>>resolved on  
>> DataChannel level, but I cannot grasp how it actually 
>>happens.
>> I think methods like getParentContext() and 
>>getChildContexts() can  
>> be useful.
>>
>> Best regards
>> Marcin
>>
> 

Re: nested contexts hierarchy

[Andrus Adamchik <an...@objectstyle.org>]

> getParentContext()

Parent context is a DataChannel of a child, so getChannel() would  
return a parent DataContext in case of a nested context and DataDomain  
in case of a top-level context.

> getChildContexts()

Context doesn't track its child contexts, only indirectly via event  
manager. If somebody describes a case of why enumerating through a  
context children might be useful (other then sending events, which is  
already implemented), we may add it, storing children via weak  
references to avoid introducing a requirement of explicitly closing  
the child context.

Andrus


On Jan 14, 2009, at 3:52 AM, Marcin Skladaniec wrote:

> Hi
>
> How do I test whether a context is a child of another one? I looked  
> up the javadocs and code for this functionality, but I failed to  
> find any. The relationship between contexts seems to be resolved on  
> DataChannel level, but I cannot grasp how it actually happens.
> I think methods like getParentContext() and getChildContexts() can  
> be useful.
>
> Best regards
> Marcin
>