JRuby：无法将org.jruby.RubyObject类的实例转换为java.time.Instant类

Question

I'm developing on a Ruby on rails (Rails 3.2.22.4) application. Ruby is JRuby (jruby1.7.x).

Problem

I'm calling a RESTful Java service from this rails application. The request of calling java service contains java.time.Instant , I tried to use ruby Time , DateTime , and use java_import directly to create java.time.Instant, but none of them worked. I got

TypeError: cannot convert instance of class org.jruby.RubyObject to class java.time.Instant

Question

Is there any ruby class, or other work around I should use to address this type conversion problem?

Thanks!

Answer 1

JRuby 9.2 supports these by default when doing Time/DateTime#to_java

so when JRuby's Java Integration sees a java.time.Instant parameter it will auto-convert a Ruby Time (or DateTime ) object.

for (old) JRuby 1.7 this obviously won't work, but creating a java.time.Instant type directly really should have worked, so keep looking into that. its hard to tell what failure are you having with that.