How do I call clojure macros from Java?

Did you call the clojure macro from Java?

This is what I am trying to do:

RT.var("clojure.core","require").invoke(Symbol.create("clojure.contrib.prxml"));
Var prxml = RT.var("clojure.contrib.prxml","prxml");
Var withOutStr = RT.var("clojure.core","with-out-str");
String stringXML = (String) withOutStr.invoke((prxml.invoke("[:Name \"Bob\"]")));

Prxml writes * out * by default, which is why I need to wrap macros with - out STR that returns a string

I received this error:

[java] java.lang.IllegalArgumentException: Wrong number of args (1) passed to: core$with-out-str
 [java]     at clojure.lang.AFn.throwArity(AFn.java:437)
 [java]     at clojure.lang.RestFn.invoke(RestFn.java:412)
 [java]     at clojure.lang.Var.invoke(Var.java:365)
 [java]     at JavaClojure.xml.main(UnkNown Source)

Solution

You have to scroll by yourself with outstr

class YourClass {
    static final Var withBindings = RT.var("clojure.core","with-bindings*");
    static final Var list = RT.var("clojure.core","list*");
    static final Var out = RT.var("clojure.core","*out*");
    static final Var prxml = RT.var("clojure.contrib.prxml","prxml");

    static String withOutStr(IFn f,Object args...) {
        StringWriter wtr = new StringWriter();
        withBindings.applyTo(list.invoke(RT.map(out,wtr),f,args));
        return wtr.toString();
    }

    ...

    String stringXML = withOutStr(prxml,"[:Name \"Bob\"]");
}