Class: Object

Inherits:

BasicObject

Defined in:

lib/jruby/scala_support.rb

Overview

Scala <-> Ruby interoperability.

Instance Method Summary

• #from_scala ⇒ Object
• #to_scala ⇒ Object

Instance Method Details

#from_scala ⇒ Object

# File 'lib/jruby/scala_support.rb', line 433

def from_scala
  case self
  when Java::jruby.collection.MapWrapper
    self.rubyHash
  when Java::scala.collection.mutable.Map
    JRuby::ScalaSupport::Map::Mutable.new(self)
  when Java::scala.collection.Map, Java::scala.collection.immutable.Map
    JRuby::ScalaSupport::Map::Immutable.new(self)
  when Java::jruby.collection.ListWrapper
    self.rubyArray
  when Java::scala.collection.mutable.Seq
    JRuby::ScalaSupport::Seq::Mutable.new(self)
  when Java::scala.collection.Seq, Java::scala.collection.immutable.Seq
    JRuby::ScalaSupport::Seq::Immutable.new(self)
  when Java::scala.Product
    # Sometimes tuples have some wraping classes, like "#<Class:...>" on top
    # of them. Some magic is needed to find actual tuple name.
    match = nil
    self.class.ancestors.find do |klass|
      match = klass.to_s.match(/^Java::Scala::Tuple(\d+)$/)
      ! match.nil?
    end

    if match
      size = match[1].to_i
      JRuby::ScalaSupport::Tuple.new(self, size)
    else
      self
    end
  when Java::jruby.collection.SetWrapper
    self.rubySet
  when Java::scala.collection.mutable.Set
    JRuby::ScalaSupport::Set::Mutable.new(self)
  when Java::scala.collection.Set, Java::scala.collection.immutable.Set,
    JRuby::ScalaSupport::Set::Immutable.new(self)
  when Java::scala.Symbol
    self.name.to_sym
  else
    self
  end
end

#to_scala ⇒ Object

# File 'lib/jruby/scala_support.rb', line 416

def to_scala
  case self
  when JRuby::ScalaSupport::Common
    self.scala_collection
  when Hash
    Java::jruby.collection.MapWrapper.new(self)
  when Set
    Java::jruby.collection.SetWrapper.new(self)
  when Array
    Java::jruby.collection.ListWrapper.new(self)
  when Symbol
    Java::scala.Symbol.apply(to_s)
  else
    self.to_java
  end
end