Re: Configuration

[Kfir Shay]

Hi Borut,

take another look at the java doc for CompositeConfiguration
http://jakarta.apache.org/commons/configuration/apidocs/org/apache/commons/configuration/CompositeConfiguration.html

The method getConfiguration only take int argument so your example line -
CompositeConfiguration config = getConfiguration("configuration.xml");
simply won't work.

Also even if I create a CompositeConfiguration object manually using the getConfiguration method will return a Configuration object which means that doing something like this (this is your example) 
XMLPropertiesConfiguration xc = (XMLPropertiesConfiguration) config.getConfiguration(2);
will throw a class cast exception.


I am not trying to pick or anything but it seems like what you told me doesn't work.

Thanks,
Kfir S.

On 1/17/06, Borut Bolčina <[EMAIL PROTECTED]> wrote:

Hello,

if you want to have access to several configuration files from one place, then you should use
CompositeConfiguration config = getConfiguration("configuration.xml");

In configuration.xml you enumerate the config files you intend to use
<?xml version="1.0" encoding="ISO-8859-1" ?>
<configuration>
  <properties fileName="Some.properties"/>
  <properties fileName="Another.properties"/>
  <xml filename="YetAnotherProperties.xml"/>
</configuration>

In the above case you can access values in all three property files through the same method calls, like
valueOfTypeLong = config.getLong("someKey", 300000);
valueOfTypeString = config.getString("anotherKey", "default value if this key not present");

If you want values from XML configuration file (YetAnotherProperties.xml) then you (for example):
List<String> keywords = config.getList("blogs.keyword");

You will get a collection of all values (value1, anotherValue) if XML config looks like
<feeds>
    <news>
        <keyword>http://www.aaa.com/feeds/12.xml</keyword>
        <keyword>http://www.bbb.com/feeds/16.xml</keyword>
        <keyword>http://www.ccc.com/feeds/18.xml</keyword>
    </news>
    <blogs>
        <keyword>value1</keyword>
        <keyword>anotherValue</keyword>
    </blogs>
</feeds>

Now, if you want an explicit configuration out of CompositeConfiguration then you can by
PropertiesConfiguration pc = (PropertiesConfiguration) config.getConfiguration(0);
or
XMLPropertiesConfiguration xc = (XMLPropertiesConfiguration) config.getConfiguration(2);
if using the above configuration.xml file.

Hope this helps,
Borut

On 17.1.2006 5:26, Kfir Shay wrote:

Hi,I am a bit confused about the documentation inconsistencies in the commonsconfiguration package.In the "ConfigurationFactory Howto" document in the section called "Theconfiguration definition file" it is stated that the xml element creates an
instance of XMLConfiguration:"The xml element can be used to load XML configuration files. It also usesthe fileName attribute to determine the name of the file to load and createsan instance of XMLConfiguration."  Yet earlier in the "Accessing properties"
section it is stated that ConfigurationFactory only return a configurationobject via the getConfiguration()  method: "Whatever way we used to load theconfiguration factory, we should now have a Configuration object that was
returned by the factory's getConfiguration()  method. This object isactually an instance of the CompositeConfiguration class"c\Currently my configuration consist of only one xml file but I want to use
the ConfigurationFactory and leverage the config.xml file for the case thatmore configuration files will be added in the future (most probably all willbe in xml format) but at the same time I need to get a XMLConfiguration
object not the more general Configuration object can someone please clarifyhow to achieve this.This is my first post to the list, I hope some of you will take the time togive me an answer.Thanks,
Kfir S.AIM:kingink24Email: [EMAIL PROTECTED]

  

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