JRuby support! (#168)

* use jruby stemmer, bump version

* oops! RUBY_PLATFORM is a const!

* travis yml jruby fix

* readme edits / roll version back

* another try at travis / better gem name

Author: mach-kernel

.travis.yml

@@ -5,6 +5,26 @@ rvm:
   - 2.2.6
   - 2.3.3
   - 2.4.0
+  - jruby-9.1.9.0
+gemfile:
+  - Gemfile
+  - Gemfile-jruby
+
+matrix: 
+  exclude:
+    - rvm: jruby-9.1.9.0
+      gemfile: Gemfile
+    - rvm: 2.0.0
+      gemfile: Gemfile-jruby
+    - rvm: 2.1.10
+      gemfile: Gemfile-jruby
+    - rvm: 2.2.6
+      gemfile: Gemfile-jruby
+    - rvm: 2.3.3
+      gemfile: Gemfile-jruby
+    - rvm: 2.4.0
+      gemfile: Gemfile-jruby
+
 notifications:
   irc:
     on_success: change

Gemfile

@@ -1,2 +1,2 @@
 source 'https://rubygems.org'
-gemspec
+gemspec name: 'classifier-reborn'

Gemfile-jruby

@@ -0,0 +1,2 @@
+source 'https://rubygems.org'
+gemspec name: 'classifier-reborn-jruby'

README.markdown

@@ -51,6 +51,16 @@ For more information read the following documentation topics.
 * [Classifier Validation](http://www.classifier-reborn.com/validation)
 * [Development and Contributions](http://www.classifier-reborn.com/development) (*Optional Docker instructions included*)
 
+### Notes on JRuby support
+
+```ruby
+gem 'classifier-reborn-jruby', platforms: :java
+```
+
+While experimental, this gem should work on JRuby without any kind of additional changes. Unfortunately, you will **not** be able to use C bindings to GNU/GSL or similar performance-enhancing native code. Additionally, we do not use `fast_stemmer`, but rather [an implementation](https://tartarus.org/martin/PorterStemmer/java.txt) of the [Porter Stemming](https://tartarus.org/martin/PorterStemmer/) algorithm. Stemming will differ between MRI and JRuby, however you may choose to [disable stemming](https://tartarus.org/martin/PorterStemmer/) and do your own manual preprocessing (or use some other [popular Java library](https://opennlp.apache.org/)). 
+
+If you encounter a problem, please submit your issue with `[JRuby]` in the title.
+
 ## Code of Conduct
 
 In order to have a more open and welcoming community, `Classifier Reborn` adheres to the `Jekyll`

Rakefile

@@ -2,7 +2,17 @@ require 'rubygems'
 require 'rake'
 require 'rake/testtask'
 require 'rdoc/task'
-require 'bundler/gem_tasks'
+
+require 'bundler/gem_helper'
+
+install_config = case RUBY_PLATFORM
+                 when 'java'
+                  { name: 'classifier-reborn-jruby' }
+                 else
+                  { name: 'classifier-reborn' }
+                 end
+
+Bundler::GemHelper.install_tasks(install_config)
 
 desc 'Default Task'
 task default: [:test]

classifier-reborn-jruby.gemspec

@@ -0,0 +1,39 @@
+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'classifier-reborn/version'
+
+Gem::Specification.new do |s|
+  s.platform = 'java'
+  s.specification_version = 2 if s.respond_to? :specification_version=
+  s.required_rubygems_version = Gem::Requirement.new('>= 0') if s.respond_to? :required_rubygems_version=
+  s.rubygems_version = '2.2.2'
+  s.required_ruby_version = '>= 1.9.3'
+
+  s.name             = 'classifier-reborn-jruby'
+  s.version          = ClassifierReborn::VERSION
+  s.license          = 'LGPL'
+  s.summary          = 'A general classifier module to allow Bayesian and other types of classifications.'
+  s.authors          = ['Lucas Carlson', 'Parker Moore', 'Chase Gilliam']
+  s.email            = ['lucas@rufy.com', 'parkrmoore@gmail.com', 'chase.gilliam@gmail.com']
+  s.homepage         = 'https://github.com/jekyll/classifier-reborn'
+
+  all_files          = `git ls-files -z`.split("\x0")
+  s.files            = all_files.grep(%r{^(bin|lib|data)/})
+  s.executables      = all_files.grep(%r{^bin/}) { |f| File.basename(f) }
+  s.require_paths    = ['lib']
+
+  s.has_rdoc         = true
+  s.rdoc_options     = ['--charset=UTF-8']
+  s.extra_rdoc_files = %w(README.markdown LICENSE)
+
+  s.add_runtime_dependency('jruby-stemmer-other', '~> 0.0.2')
+
+  s.add_development_dependency('rake')
+  s.add_development_dependency('rdoc')
+  s.add_development_dependency('minitest')
+  s.add_development_dependency('minitest-reporters')
+  s.add_development_dependency('rubocop')
+  s.add_development_dependency('pry')
+  s.add_development_dependency('redis')
+end

lib/classifier-reborn.rb

@@ -25,7 +25,15 @@
 # License::   LGPL
 
 require 'rubygems'
+
+case RUBY_PLATFORM
+when 'java'
+  require 'jruby-stemmer'
+else
+  require 'fast-stemmer'
+end
+
 require_relative 'classifier-reborn/category_namer'
 require_relative 'classifier-reborn/bayes'
 require_relative 'classifier-reborn/lsi'
-require_relative 'classifier-reborn/validators/classifier_validator'
+require_relative 'classifier-reborn/validators/classifier_validator'

lib/classifier-reborn/category_namer.rb

@@ -2,7 +2,6 @@
 # Copyright:: Copyright (c) 2005 Lucas Carlson
 # License::   LGPL
 
-require 'fast_stemmer'
 require 'classifier-reborn/extensions/hasher'
 
 module ClassifierReborn