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https://issues.apache.org/jira/browse/CONFIGURATION-215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12464489
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Michiel Kalkman commented on CONFIGURATION-215:
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My apologies for not reacting sooner. This item did get less relevant for me
and it "escaped" from my todo list somehow.
However, I think the item could pop up again in the (near) future, so the item
might get relevant for me again.
The solution you suggest definitely seems okay to me - it would resolve the
original issue I had.
> Using relative URLs
> -------------------
>
> Key: CONFIGURATION-215
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-215
> Project: Commons Configuration
> Issue Type: Improvement
> Reporter: Michiel Kalkman
> Priority: Minor
>
> It would be useful to be able to specify URLs in configuration item values
> that are relative to the configuration.
> A sample. I have the following files.
> A/config.xml which refers to
> B/specificConfigForB.xml which refers to
> B/somefile
> Now specifying the location of somefile in specificConfigForB.xml should be
> possible using a relative URL, such that it is possible to retrieve the
> absolute URL of somefile through:
> a) the absolute URL of A/config.xml (e.g.: file:/c:/A/config.xml or
> http://A/config.xml)
> b) the relative URL of somefile specified in B/specificConfigForB.xml (like
> <somefile>somefile</somefile>)
> (1) One solution is to make it possible to find the location of the
> configuration file that specifies the relative URL. Or more general, commons
> config should know where a given configuration item is stored.
> In this case it might be an idea to implement a getURL() on the Configuration
> interface which uses:
> 1. the absolute URL of the composite configuration file, (A/config.xml)
> 2. the relative URL to the specfying configuration file,
> (B/specificConfigForB.xml)
> 3. the relative URL specified (in B/specificConfigForB.xml)
> (2) Another solution is to specify a special meta variable (like ${url}) that
> can be used to specify the location of the specifying configuration file wrt
> the composite configuration file. E.g. <somefile>${url}/somefile</somefile>
> would result in ../B/somefile.
> (3) Another solution would be to specify a special attribute to indicate that
> the value specified is an URL. Like <somefile type="URL">somefile</somefile>.
> The advantage of solution (1) is that no extra semantics are introduced to
> the configuration files. Furthermore, it might possibly be useful in
> debugging situations. The advantages of solution (2) is that in this manner
> other meta variables might be introduced. The disadvantage of solution (3) is
> that this one cannot be applied to property files.
> See also
> http://mail-archives.apache.org/mod_mbox/jakarta-commons-user/200606.mbox/[EMAIL
> PROTECTED]
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