module Embulk

def set(ruby_object)
  # Using |java_send| so that it calls Java's correct overloaded |set| method, not Ruby's itself.
  if ruby_object.nil?
    self.java_send(:setNull, [])
  elsif ruby_object == true || ruby_object == false
    self.java_send(:set, [::Java::boolean], ruby_object.to_java(:boolean))
  elsif ruby_object.kind_of?(Integer)
    self.java_send(:set, [::Java::long], ruby_object.to_java(:long))
  elsif ruby_object.kind_of?(Float)
    self.java_send(:set, [::Java::double], ruby_object.to_java(:double))
  elsif ruby_object.kind_of?(String)
    self.java_send(:set, [::Java::java.lang.String], ruby_object.to_java(::Java::java.lang.String))
  elsif ruby_object.kind_of?(Time)
    self.java_send(:set, [::Java::org.embulk.spi.time.Timestamp],
                   ::Java::org.embulk.spi.time.Timestamp.ofEpochSecond(ruby_object.to_i, ruby_object.nsec))
  else
    self.java_send(:set, [::Java::org.msgpack.value.Value],
                   ::Java::org.msgpack.core.MessagePack.newDefaultUnpacker(ruby_object.to_msgpack.to_java_bytes).unpackValue())
  end
end