Konrad Windszus created FELIX-6384:
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Summary: Felix Configadmin Interpolator: Support default directive
with empty value
Key: FELIX-6384
URL: https://issues.apache.org/jira/browse/FELIX-6384
Project: Felix
Issue Type: Improvement
Components: Configuration Admin
Affects Versions: configadmin-interpolation-plugin-1.1.0
Reporter: Konrad Windszus
Currently in
https://github.com/apache/felix-dev/tree/master/configadmin-plugins/interpolation#default-values
it is not stated that an empty value is not supported as default value. Still
the following code is not replaced as expected
{code}
$[env:NON_EXISTING_VAR;default=]
{code}
This is due to the parsing logic in
https://github.com/apache/felix-dev/blob/0aa232a4ff8f95e92d947027ac7d8010e2a0e142/configadmin-plugins/interpolation/src/main/java/org/apache/felix/configadmin/plugin/interpolation/Interpolator.java#L118
which detects the directive (in this case {{default}}) only in case there is
at least one character after the {{=}}.
This limitation should be lifted to also allow empty values as default values.
At the same time values containing the character {{=}} should be allowed as
well.
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