[slf4j-dev] Logger.debug(String, Object[])?

[Curt Arnold]

On Aug 5, 2005, at 10:14 AM, Niclas Hedhman wrote:

> On Friday 05 August 2005 17:29, Ceki Gülcü wrote:
>
>> The Object[] param form has been requested very frequently. It's  
>> quite
>> a reasonable request. As such, you can expect method accepting
>> Object[] as parameter to be added in the near future.
>>
>
> Didn't we at some point say that
>
>  void debug( String format, Object args );
>
> can quite easily take the
>
>   logger.debug( "{} : {} : {}", new Object[] { arg1, arg2, arg3 } );
>
> and therefor the proposed signature would not be needed, but  
> support in
> runtime...


Yes, but that changes a compile-time determination of the developers  
intent into a run-time determination.  With two distinct signatures,  
you can distinguish between:

Object foo = new Integer(5);
if (useArray) {
     foo = new Object[] { "Hello, World", "Goodnight, Gracie" };
}
logger.debug("foo = {}", foo);

and

Object[] salutations = new Object[] { "Hello, World", "Goodnight,  
Gracie" };
logger.debug("Morning greeting = {}, Evening greeting = {}",  
saluations);

If you only have one signature, the body would have no way to know  
whether the developer had intended it be to treated as one parameter  
or many.