JRuby

integration issues with Java classes containing inner classes

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Major Major
  • Resolution: Fixed
  • Affects Version/s: JRuby 1.1.3, JRuby 1.1.4
  • Fix Version/s: JRuby 1.2
  • Component/s: Java Integration
  • Labels:
    None
  • Environment:
    JRuby 1.1.4 and 1.1.3 on Sun Java SE build 1.6.0_07-b06 running on Win2K w/SP4
  • Number of attachments :
    0

Description

Attempting to import a Java class (containing either named or anonymous inner classes) from a require'd JAR causes an exception.

Replicate by running the following Ruby code after downloading the stringtemplate.jar file included in this distribution http://stringtemplate.org/download.html

jruby_st2.rb
begin
  raise LoadError, 'missing JRuby' unless RUBY_PLATFORM == 'java'
  require 'java'
  require 'C:/temp/stringtemplate.jar'
rescue LoadError => e
  puts "#{e.message}; exiting..."
  exit -1
end

def purge(e)
  puts e.message
  e.backtrace.each { |i| puts i }
end

begin
  # try to import class with no inner classes
  import 'org.antlr.stringtemplate.AutoIndentWriter'
rescue Exception => e
  purge e
end

begin
  # try to import class with anonymous inner class
  import 'org.antlr.stringtemplate.StringTemplateGroup'
rescue Exception => e
  purge e
end

begin
  # try to import class with 2 named static final classes
  import 'org.antlr.stringtemplate.StringTemplate'
rescue Exception => e
  purge e
end

Running the above file using jruby jruby_st2.rb gives the following:

Exception Summary
cannot link Java class org.antlr.stringtemplate.StringTemplateGroup
(eval):1:in `binding'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:67:in `eval'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:67:in `include_class'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:38:in `each'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:38:in `include_class'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:81:in `java_import'

jruby-st2.rb:44
cannot link Java class org.antlr.stringtemplate.StringTemplate
(eval):1:in `binding'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:67:in `eval'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:67:in `include_class'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:38:in `each'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:38:in `include_class'
E:/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/core_ext/object.rb:81:in `java_import'

jruby-st2.rb:51

Activity

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Jon added a comment -

I now believe that this is not a JRuby bug as adding

require 'c:/temp/antlr-2.7.7.jar' to the first begin...end block causes the code sample to work as expected without throwing link exceptions. Code was originally ported from a working Groovy example (which didn't require the ANTLR JAR at runtime) which apparently manages run-time dependencies differently.

Sorry for the red herring...

Show
Jon added a comment - I now believe that this is not a JRuby bug as adding require 'c:/temp/antlr-2.7.7.jar' to the first begin...end block causes the code sample to work as expected without throwing link exceptions. Code was originally ported from a working Groovy example (which didn't require the ANTLR JAR at runtime) which apparently manages run-time dependencies differently. Sorry for the red herring...
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Charles Oliver Nutter added a comment - - edited

Jon: I think what's more likely is that since Groovy uses Antlr for their parser, that particular dependency was already present. But yes, in general, "cannot link" errors mean that the class had an unresolved dependency. Maybe we can capture that error and provide a better one somewhere.

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Charles Oliver Nutter added a comment - - edited Jon: I think what's more likely is that since Groovy uses Antlr for their parser, that particular dependency was already present. But yes, in general, "cannot link" errors mean that the class had an unresolved dependency. Maybe we can capture that error and provide a better one somewhere.
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Charles Oliver Nutter added a comment -

"cannot link" errors were fixed recently to produce a better error message that I believe would have avoided some confusion. Ultimately not a JRuby bug, but I'll mark fixed since we did improve the error that results.

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Charles Oliver Nutter added a comment - "cannot link" errors were fixed recently to produce a better error message that I believe would have avoided some confusion. Ultimately not a JRuby bug, but I'll mark fixed since we did improve the error that results.

People

  • Assignee:
    Charles Oliver Nutter
    Reporter:
    Jon
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Dates

  • Created:
    Updated:
    Resolved: