You can pass in a length 0 array of java.nio.file.attribute.FileAttribute's like so:
(java.nio.file.Files/createTempDirectory "mytempname" (make-array java.nio.file.attribute.FileAttribute 0)) Andy On Dec 10, 2012, at 8:54 PM, Dave Kincaid wrote: > I just came across this same problem while trying to use Java 7's > java.nio.file.Files.createTempDirectory() > (http://docs.oracle.com/javase/7/docs/api/java/nio/file/Files.html#createTempDirectory(java.lang.String, > java.nio.file.attribute.FileAttribute...)) > > Clojure won't let me just do (java.nio.file.Files/createTempDirectory "mydir") > > It wants the FileAttribute argument. Can anyone help me get past this? I'm > stuck since I really can't figure out how to create a FileAttribute. Am I > better off just using Apache commons or something like that? > > On Monday, September 27, 2010 7:20:04 PM UTC-5, ataggart wrote: > The vararg at the end of the method is just syntactic sugar for an > array, so the "add" method actually takes 4 args, the last being a > Resource array. The java compiler just replaces "missing" varargs > with an empty array. > > My guess is that the reflection mechanisms in the compiler just look > at type/arity. The Method object has a isVarArg() boolean, so that > could be used to allow omitting varargs altogether. That would need > to be an enhancement to the clojure compiler, so I opened a ticket: > > https://www.assembla.com/spaces/clojure/tickets/440-java-method-calls-cannot-omit-varargs > > > > On Sep 27, 1:16 pm, JonathanBelolo <jonat...@scorpiomusic.fr> wrote: > > While toying with the Sesame2.3 library, I've come across the > > following behavior for the first time. > > > > This is taken from the api doc for > > org.openrdf.repository.base.RepositoryConnectionBase: > > > > add(Resource subject, URI predicate, Value object, Resource... > > contexts) > > Adds a statement with the specified subject, predicate and > > object to this repository, optionally to one or more named contexts. > > > > But apparently, Clojure seems to think the optional args are > > mandatory... > > > > (.add con alice RDF/TYPE person) > > > > No matching method found: add for class > > org.openrdf.repository.sail.SailRepositoryConnection > > [Thrown class java.lang.IllegalArgumentException] > > > > So I run > > > > (grep #".add" (.getMethods (.getClass con))) > > > > #<Method public void > > org.openrdf.repository.base.RepositoryConnectionBase.add(org.openrdf.model. > > Resource,org.openrdf.model.URI,org.openrdf.model.Value,org.openrdf.model.Re > > source[]) > > throws org.openrdf.repository.RepositoryException>) > > > > Finally the following works... > > > > (.add con alice RDF/TYPE person (make-array Resource 1)) > > nil > > > > Is this behavior normal? Are optional args mandatory when called with > > interop? > > > > Thanks for your help :) > > > > Jonathan > > -- > 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 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
