Re: [Jython-dev] tried to submit to FAQ

[Samuele P. <pe...@in...>]

Hi.

> Subject:Indefinite number of functional arguments
>
>
> Question:
>
>
> The statement (e.g.)
>
>      def functionName ( arg1,  *otherArgs)
>
> is really useful sometimes and has no real equivalent in java.
> Tried (with no success) all the ways I can think of to convert this to
> (e.g.)
>
>      public String functionName( java.lang.String arg1,
>                                  java.lang.String [] otherArgs )
>
> Does anyone have any suggestions?

That's really the typical java idiom to achieve that:

... meth(...,<a-specific-type>[] rest)
... meth(...,Object[] rest)

and at call site:
  anObj.meth(..., new <your-type>[] {expr,....} )

but if also at call site your rest argument should be programmatically
constructed (they number is known at runtime only)
you can use either a Vector or an ArrayList (with Java2):

java.util.ArrayList rest = new java.util.ArrayList();
... fill up rest
meth.func(...,rest.toArray(new <your-type>[0]))

if <your-type> is Object, then the parameter-less version of toArray is fine.

Depending on some trade-offs you could use ArrayList(Vector) instead of the
array type in meth signature.

More a Java FAQ than a jython one <wink>.

regards, Samuele Pedroni