Hi,
I suspected that the whole thing gets a bit out of scope for [lang] and
now Stephen confirmed it.
But okay, I can live with that. Just provide basic support in [lang] and
I will build around it what I need. However it would be helpful if you
supported a more abstract concept for the source of variable values than
a simple map. If we had something like
StrBuilder.replace(String prefix, String suffix, VariableResolver v)
where VariableResolver is a very simple interface:
public interface VariableResolver
{
Object getVariable(String name);
}
and there can be a default implementation for a MapVariableResolver.
Then I could pack the logic I had before in my Interpolation class
(support for different variable resolvers, default variable resolver
etc.) into a special implementation of this interface.
Would this still be out of [lang]'s scope?
Oliver
Gary Gregory wrote:
Hello:
Should such proposed StrBuilder methods also not be in StringUtils?
Whichever way we go (or provide both), I can still see the benefit of a
class that can be instantiated and configured with "$" "{", "}" and a
map.
Gary
-----Original Message-----
From: Stephen Colebourne [mailto:[EMAIL PROTECTED]
Sent: Monday, June 27, 2005 3:36 PM
To: Jakarta Commons Developers List
Subject: Re: [lang] text.Interpolation, on to 2.2
Gary Gregory wrote:
Hello Oliver:
I took a quick look at the ticket you linked to below. For this to
work
for System properties, a simple VariableResolver would do the trick I
think. Maybe a generic MapVariableResolver could also be provided and
maybe a factory methods in order to say simple things like:
Interpolator.newInterpolator(System.getProperties()).resolve("The file
is here ${java.io.tmpdir}");
I should point out that System.getProperties() returns a Properties
which extends Hashtable which implements Map. So, these are not two
separate use cases.
Thus an API of the form might be enough:
StrBuilder.replace(prefix, suffix, map)
StrBuilder.replaceAll(prefix, suffix, map)
Stephen
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