# this is note for future update

module Norikra
  module UDF
    class FailedUDFImplementationPureRuby
      # require 'jruby/core_ext'
      class WootheeIsCrawler < Norikra::UDF::Base # Norikra::UDF::WootheeIsCrawler < Norikra::UDF::Base
        def self.init
          require 'woothee'
        end

        def self.function_name
          "isCrawler"
        end

        def self.isCrawler(agent)
          Woothee.is_crawler(agent)
        end
        class << self
          add_method_signature( "isCrawler", [java.lang.Boolean, java.lang.String] )
        end
      end

      # for engine.rb
      def load_udf_actually(udf_klass)
        require 'jruby/core_ext'
        udf_klass.init

        jclass = udf_klass.become_java!(".")
        className = jclass.get_name.to_java(:string)

        #### try for NullPointerException, but doesn't work well
        # field = jclass.getDeclaredField("ruby");
        # field.setAccessible(java.lang.Boolean::TRUE)
        # field.set(nil, org.jruby.Ruby.getGlobalRuntime)

        functionName = udf_klass.function_name.to_java(:string)
        methodName = udf_klass.method_name.to_java(:string)

        valueCache = udf_klass.value_cache ? VALUE_CACHE_ENUM::ENABLED : VALUE_CACHE_ENUM::DISABLED
        filterOptimizable = udf_klass.filter_optimizable ? FILTER_OPTIMIZABLE_ENUM::ENABLED : FILTER_OPTIMIZABLE_ENUM::DISABLED
        rethrowExceptions = udf_klass.rethrow_exceptions

        debug "adding SingleRowFunction", :class => udf_klass.to_s, :javaClass => jclass.get_name
        @config.addPlugInSingleRowFunction(functionName, className, methodName, valueCache, filterOptimizable, rethrowExceptions)
      end
    end
  end
end