Wojtek created CONFIGURATION-831:
------------------------------------
Summary: Unresolved (non-existend) environment variables should
return null
Key: CONFIGURATION-831
URL: https://issues.apache.org/jira/browse/CONFIGURATION-831
Project: Commons Configuration
Issue Type: New Feature
Components: Interpolation
Affects Versions: 2.9.0
Reporter: Wojtek
Currently Interpolation of environment variables
(https://commons.apache.org/proper/commons-configuration/userguide/howto_basicfeatures.html#Variable_Interpolation)
return un-interpolated string if the environment variable doesn't exists at
all.
It would be very convenient and (I feel) more consistent if, in that case,
'null' would be returned.
Alternatively, option to specify default if the variable doesn't exist would
also work.
I.e. something along the lines:
```
${env:JAVA_HOME:<default value>}
```
>From my experiments, even if we try to register custom interpolator it's not
>possible to explicitly return `null` from it.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
