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From Oliver Heger <oliver.he...@oliver-heger.de>
Subject Re: AW: Commons Configuration: delete entry
Date Tue, 08 Aug 2006 20:34:51 GMT
Christian Koncilia wrote:
> Hi Oliver,
> 
> thats what I tried before but it doesn't work neither. Another strange thing, if I use
"config.clear()" to clear the whole properties file, everything except(!) the last thing I
read is deleted...
> 
> This looks to me like some internal bug. Or do you have another idea?
> 
> Bye
>     Christian

Christian,

I added the following test cases to the unit test class of 
PropertiesConfiguration [1]:


     public void testClearProperty() throws ConfigurationException
     {
         if (testSavePropertiesFile.exists())
         {
             assertTrue(testSavePropertiesFile.delete());
         }
         assertTrue("Property not found", 
conf.containsKey("configuration.loaded"));
         conf.clearProperty("configuration.loaded");
         conf.save(testSavePropertiesFile);

         PropertiesConfiguration conf2 = new 
PropertiesConfiguration(testSavePropertiesFile);
         assertFalse("Property still contained", 
conf2.containsKey("configuration.loaded"));
     }

     public void testClear() throws ConfigurationException
     {
         if (testSavePropertiesFile.exists())
         {
             assertTrue(testSavePropertiesFile.delete());
         }
         conf.clear();
         conf.save(testSavePropertiesFile);

         PropertiesConfiguration conf2 = new 
PropertiesConfiguration(testSavePropertiesFile);
         assertTrue("Configuration not empty", conf2.isEmpty());
     }

Here conf is an instance of PropertiesConfiguration that is initialized 
with a test properties file. testSavePropertiesFile is a File object, 
which points to the target file. Both test cases work for me, so I can't 
reproduce your problem.

Which version of Commons Configuration do you use?

After you have removed the property by calling clearProperty() can you 
check what containsKey() says? And does the isEmpty() method return true 
after you have called clear()?

Oliver

[1] 
http://svn.apache.org/repos/asf/jakarta/commons/proper/configuration/trunk/src/test/org/apache/commons/configuration/TestPropertiesConfiguration.java

> 
> -----Urspr√ľngliche Nachricht-----
> Von: Oliver Heger [mailto:oliver.heger@oliver-heger.de]
> Gesendet: Mo 07.08.2006 21:53
> An: Jakarta Commons Users List
> Betreff: Re: Commons Configuration: delete entry
>  
> Christian Koncilia wrote:
>> Hello everybody,
>>
>> I have a question regarding the Commons Configuration. Let's assume I
>> have a configuration file "myprops.properties" that looks like this:
>>
>>> -------------------------
>> # written by PropertiesConfiguration
>> # Mon Aug 07 08:29:12 CEST 2006
>>
>> group1.entry1 = value1
>> group1.entry2 = value2
>> group1.entry3 = value3
>>> -------------------------
>> Now I would like to simply delete an entry. For instance, I would like
>> to remove the whole line "group1.entry2 = value2" from my properties
>> file. How do I do this?
>>
>> Using
>>
>>   PropertiesConfiguration config = 
>>             new PropertiesConfiguration("myprops.properties");
>>   config.clearProperty("group1.entry2 = value2");
>>   config.save();
>>
>> doesn't work. 
>>
>> Thanks for your help!
>>
>> Bye
>>     Christian
>>
> You only need to pass in the key of the property you want to delete to 
> clearProperty(), so the line in question should run:
> 
> config.clearProperty("group1.entry2");
> 
> HTH
> Oliver
> 
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> 
> 
> 


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