[CONFIGURATION-395] groovy for interpolation and expression engine

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: 2.x
• Component/s: Expression engine, Interpolation
• Assignee: Unassigned
• Reporter: ron
• Created: 06/Sep/09 08:06
• Updated: 24/Mar/16 20:12

Description

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