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Message-ID: <8f5507fb0811261337n5cc6c074pf11ee5efb123fd21@mail.gmail.com>
Date: Wed, 26 Nov 2008 21:37:34 +0000
From: "Brian Boyle" <bboyle18@gmail.com>
To: "Commons Users List" <user@commons.apache.org>
Subject: Re: Commons Configuration - Saving a combined configuration
In-Reply-To: <492DC04F.6030008@oliver-heger.de>
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Thanks Oliver, that worked.
Thanks for your help with this.
Brian

On Wed, Nov 26, 2008 at 9:31 PM, Oliver Heger
<oliver.heger@oliver-heger.de>wrote:

> Brian Boyle schrieb:
>
>> Hi Oliver,
>>
>> Thanks for replying so quickly.
>> I tried out your suggestion and it works perfectly.
>> I've had a look at the CombinedConfiguration object and I managed to get
>> it
>> working. I have added my code below.....is this the correct way to do this
>> or is there an even easier way to do it with CombinedConfiguration?
>>
>> Cheers,
>>
>> Brian
>>
>>            CombinedConfiguration cc = new CombinedConfiguration(new
>> OverrideCombiner());
>>            cc.addConfiguration(masterConf);
>>            cc.addConfiguration(localConf);
>>
>>            XMLConfiguration result = new XMLConfiguration();
>>            result.setRootNode(cc.getRootNode());
>>            XMLConfiguration finalResult = new XMLConfiguration(result);
>>            finalResult.setRootElementName("IMConfig");
>>            finalResult.save("resources/CombinedConfig.xml");
>>
>>
> I think you should be able to do
>
>        CombinedConfiguration cc = new CombinedConfiguration(new
>  OverrideCombiner());
>        cc.addConfiguration(masterConf);
>        cc.addConfiguration(localConf);
>        XMLConfiguration result = new XMLConfiguration(cc);
>        result.save(...);
>
> Oliver
>
>
>
>> On Wed, Nov 26, 2008 at 9:04 PM, Oliver Heger
>> <oliver.heger@oliver-heger.de>wrote:
>>
>>  Brian Boyle schrieb:
>>>
>>>  Hi there,
>>>
>>>> I am using the OverrideCombiner class to combine two XMLConfigurations
>>>> together. This works fine and then I set this combined configuration as
>>>> the
>>>> RootNode of a new XMLConfigruation. I am then trying to save this newly
>>>> created configuration as a new file and this does not seem to work. Does
>>>> anybody know if this is possible or have a missed a step along the way?
>>>>
>>>> Thanks,
>>>>
>>>> Brian
>>>> P.S. Here is my code.
>>>>
>>>>          XMLConfiguration masterConf = new XMLConfiguration();
>>>>          XMLConfiguration localConf = new XMLConfiguration();
>>>>           masterConf.load("resources/Masterconfig.xml");
>>>>           localConf.load("resources/localConfig.xml");
>>>>
>>>>           NodeCombiner combiner = new OverrideCombiner();
>>>>           ConfigurationNode cn =
>>>> combiner.combine(localConf.getRootNode(),
>>>> masterConf.getRootNode());
>>>>
>>>>           XMLConfiguration result = new XMLConfiguration();
>>>>           result.setRootNode(cn);
>>>>           result.save("resources/CombinedConfig.xml");
>>>>
>>>>
>>>>  The problem is that the configuration nodes contain references to the
>>> XML
>>> DOM elements they correspond to. These references are also used by
>>> XMLConfiguration to find out, which nodes have been changed and must be
>>> written.
>>>
>>> To solve your problem these references must be cleared. The easiest way
>>> to
>>> do this is using the constructor of XMLConfiguration that takes another
>>> hierarchical configuration as argument. You can try creating another
>>> XMLConfiguration as copy of the existing one:
>>>
>>>       XMLConfiguration result = new XMLConfiguration();
>>>       result.setRootNode(cn);
>>>       XMLConfiguratiion finalResult = new XMLConfiguration(result);
>>>       finalResult.save(...);
>>>
>>> BTW, is there a reason why you do not use CombinedConfiguration? This
>>> class
>>> will do the work with the combiners for you. You can then create the
>>> result
>>> XMLConfiguration from this combined configuration.
>>>
>>> HTH
>>> Oliver
>>>
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>>>
>>>
>>
>>
>
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-- 
Brian Boyle
Mobile: 087 418 5215
Email: bboyle18@gmail.com

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