# Copyright: Copyright 2009 Topic Maps Lab, University of Leipzig.
# License:   Apache License, Version 2.0

module RTM::IO
  # JTM Export.
  # Each Topic Maps Construct gets a to_jtm method.
  module TOJTM
    begin
      require 'json/ext'
    rescue LoadError
      require 'json/pure'
    end unless Object.const_defined?(:JSON)

    module TopicMap
      # Returns the JTM representation of this RTM::TopicMap
      def to_jtm_str          # only for export with no file and base_iri otherwise TMAPIX
        h = to_hash
        h[:version] = "1.0"
        h[:item_type] = "topicmap"
        h.to_json
      end
      # alias :to_json :to_jtm_str
    end

    module Topic
      # Returns the JTM representation of this RTM::Topic
      def to_jtm
        h = to_hash
        h[:version] = "1.0"
        h[:item_type] = "topic"
        h.to_json
      end
      alias :to_json :to_jtm
    end

    module Association
      # Returns the JTM representation of this RTM::Association
      def to_jtm
        h = to_hash
        h[:version] = "1.0"
        h[:item_type] = "association"
        h.to_json
      end
      alias :to_json :to_jtm
    end

    module Name
      # Returns the JTM representation of this RTM::Name
      def to_jtm
        h = to_hash
        h[:version] = "1.0"
        h[:item_type] = "name"
        h.to_json
      end
      alias :to_json :to_jtm
    end

    module Occurrence
      # Returns the JTM representation of this RTM::Occurrence
      def to_jtm
        h = to_hash
        h[:version] = "1.0"
        h[:item_type] = "occurrence"
        h.to_json
      end
      alias :to_json :to_jtm
    end

    module Role
      # Returns the JTM representation of this RTM::Role
      def to_jtm
        h = to_hash
        h[:version] = "1.0"
        h[:item_type] = "role"
        h.to_json
      end
      alias :to_json :to_jtm
    end

    module Variant
      # Returns the JTM representation of this RTM::Variant
      def to_jtm
        h = to_hash
        h[:version] = "1.0"
        h[:item_type] = "variant"
        h.to_json
      end
      alias :to_json :to_jtm
    end

    RTM.register_extension self
    
  end
end