Torsten Curdt wrote:
> On Tue, 12 Feb 2002, Berin Loritsch wrote:
>
>
>>Torsten Curdt wrote:
>>
>>>Wouldn't it make sense to also have a
>>>
>>> class CascadingConfiguration extends AbstractConfiguration {
>>>
>>> public CascadingConfiguration( Configuration conf ) {
>>> ...
>>>
>>>So we can apply the same pattern as for the ComponentManager or the
>>>RoleManager? So you easily split configuration files...
>>>
>>? How do you see this working?
>>
>
> Every lookup of values will use the usual configuation object first.
> If there is no such element the lookup is delegated to the parent
> configuration.
Keep in mind that each Container can add it's own include semantics.
That is the general rule of thumb I am using for the AbstractContainer
in the excalibur.system package. (Man it would be sweet if we can
knock off the org.apache.avalon prefix--I say know after arguing against
it in the past :/ )
The include semantics would be something like this:
<root include="foo.xconf">
</root>
In this case, the included elements would be included as a child of the
element.
<root>
<xi:include href="foo.xconf"/>
</root>
In this case, the included elements would replace the <xi:include/> element.
In the latter case, using the XInclude semantics from W3C, it can be built
into the Parser object: with the <parameter name="support-xinclude" value="true"/>
parameter.
Would that satisfy the requirements?
>>Seriously, the Configuration works fairly elegantly right now. If I
>>have a child that uses a Configuration block, I send the child to it.
>>That Child Component cannot see any configurations from the parent.
>>
>
> That's true is really nice right now. But it having the
> CascadingConfiguration gives us the possibility to split
> configurations over multiple file (without ugly XML entities ;)
>
> Should be an nice addition to Excalibur maybe?
:/
I think what you really want is configuration including--not necessarily
Cascading Configuration objects--although that approach would enable a
template configuration tree that had defaults....
--
"They that give up essential liberty to obtain a little temporary safety
deserve neither liberty nor safety."
- Benjamin Franklin
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