groovy for interpolation and expression engine
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Key: CONFIGURATION-395
URL: https://issues.apache.org/jira/browse/CONFIGURATION-395
Project: Commons Configuration
Issue Type: Improvement
Components: Expression engine, Interpolation
Reporter: ron
Priority: Minor
Currently the expression engine can be set but not the interpolation.
This patch proposes the ability to set a user specified interpolation engine.
It includes a groovy interpolation engine. Groovy comes naturally as an
expressions and interpolation language in the java environment
API usage:
AbstractConfiguration c = new
PropertiesConfiguration("conf/test.conf");
c.setInterpolator(new GInterpolator(c));
System.out.println(c.getString("test"));
Configuration examples:
library.path.1=${ if
("${System.getProperty{('os.name')}".toLowerCase().startsWith("windows"))
"libw.dll"; else "libl" }
password=${println 'enter password'; readln}
I think that this is more feature rich than JEXL and is easier to use for java
programmers.
- Ron
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