Re: Inter-operating with Java lists

[Per Bothner <per at bothner dot com>]

Bhinderwala, Shoeb wrote:

> I have a list of Java objects in a Java list (e.g. java.util.ArrayList).
>
> I have a scheme function that takes a Scheme list as a parameter.
>
> How do I pass my Java list to the scheme function?

I think the thing to do is to generalize the makeList method
in gnu.lists.LList as below.  You can then invoke this from
Scheme:
  (gnu.lists.LList:makeList jlist)

  public static LList makeList (java.util.List vals)
  {
    java.util.Iterator e = vals.iterator();
    LList result = LList.Empty;
    Pair last = null;
    while (e.hasNext())
      {
        Pair pair = new Pair(e.next(), LList.Empty);
        if (last == null)
          result = pair;
        else
          last.cdr = pair;
        last = pair;
      }
    return result;
  }

There are some other changes also needed, which I expect I will
check into CVS tomorrow morning.
--
	--Per Bothner
per@bothner.com   http://per.bothner.com/