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Date: Thu, 30 Nov 2006 22:02:29 +0100
From: Oliver Heger <oliver.heger@oliver-heger.de>
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To: Jakarta Commons Users List <commons-user@jakarta.apache.org>
Subject: Re: Variable interpolation in composite configuration
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Hi,

interpolation should work with a CompositeConfiguration. There are some 
unit tests that check this.

 From your XML configuration file:
 > ********************** config2.xml **********************
 >
 > <conf>
 >    <value name="${key1.property }"/>
 > </conf>

There is an additional space before the closing curly bracket in the 
variable. Is this a typo? This will cause the problem.

Oliver

MASTRELLA STEFANO wrote:
> Hi everybody,
> 
> What I need to is to reference some key in a configuration file from
> another config file.
> As an example cosider to have this configuration file for the
> CompositeConfiguration
> 
> 
> **********************composite-config.xml**********************
> 
> <?xml version="1.0" encoding="ISO-8859-1" ?>
> 
> <configuration>
>   <properties fileName="config1.properties"/>
>   <xml fileName="config2.xml"/>
> </configuration>
> 
> and the following configuration file specified above
> 
> **********************config1.properties**********************
> key1.property=1
> 
> ********************** config2.xml **********************
> 
> <conf>
>    <value name="${key1.property }"/>
> </conf>
> 
> As the CompositeConfiguration load first the cofig1.properties when I
> try to look for the key "value[@name]" or "value/@name" (xpath version)
> with this snippet of code
> 
> 
> ConfigurationFactory factory = new ConfigurationFactory();
> 
> URL configURL = new File("config-composite.xml").toURL();
> 
> factory.setConfigurationURL(configURL);
> 
> Configuration config = factory.getConfiguration();
> 
> String prop = config.getString("value[@name]");
> 
> 
> I'd expected to see the value "1" as defined in config.properties,
> instead of ${key1.property}.
> 
> Is there any mistakes in what I thought?
> There's something more to do for variable interpolation?
> 
> TIA
> 
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