[jira] [Created] (JENA-967) Suggested ARQ Extension function: afn:printf(...)

[Stuart Williams (JIRA)]

Stuart Williams created JENA-967:
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             Summary: Suggested ARQ Extension function: afn:printf(...)
                 Key: JENA-967
                 URL: https://issues.apache.org/jira/browse/JENA-967
             Project: Apache Jena
          Issue Type: New Feature
          Components: ARQ
            Reporter: Stuart Williams
            Priority: Minor


There are situations where it would be useful to be able to format strings 
bound to variable. In particular I have wanted to create some zero-filled 
numeric strings.

I've accomplished the task with a pair of BINDs as follows where `?code` is 
bound to a numeric string:

   BIND( "000000" as ?zfill )
   BIND( 
concat(if(strlen(?code)>=strlen(?zfill),"",substr(?zfill,strlen(?code)+1)),?code)
 as ?reg_notation)

But it would have been nice to be able to use something less opaque like:

   BIND( afn:printf("%06d",?code) as ?reg_notation)

So 'improvement'/'new feature' suggestion is an additional ARQ Extension 
function that exposes java `printf` method.





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