In that case, I would suggest writing a minimal wrapper, either in Java or Clojure.
To get the basic sequence operations, you can simply implement the interface clojure.lang.ISeq on the wrapper. On Wednesday, 18 March 2015 09:17:09 UTC+8, juvenn wrote: > > Thanks Niels, but what if a java class is not available for rewrite? Say, > it is from an external library. > > — > Sent from Mailbox <https://www.dropbox.com/mailbox> > > > On Tue, Mar 17, 2015 at 10:01 PM, Niels van Klaveren < > niels.va...@gmail.com <javascript:>> wrote: > >> If a java class implements Iterable, it automatically supports seq. >> >> On Tuesday, March 17, 2015 at 11:34:17 AM UTC+1, juvenn wrote: >>> >>> Dear all, >>> >>> Given a node type from singly linked list: >>> >>> class Node { >>> int val; >>> Node next; >>> } >>> >>> How do I extend it so `(seq node)` will return a sequence of values? And >>> generally first, rest, and next will work on node too. >>> >>> While in Java, we could define the class to implement Iterable to >>> achieve this. In Clojure we do have `extend-type`, but it seems not >>> accepting interfaces to extend, nor do I find protocol for seqable. >>> >>> So generally, given a class defined in Java, assuming it is not >>> available for rewrite, how shall we extend the class to participate in >>> sequence operations in Clojure? >>> >>> Thanks in advance! >>> >>> — >>> Sent from Mailbox <https://www.dropbox.com/mailbox> >>> >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com >> <javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
