Contents

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

module RTM::Sugar::TopicMap
  module Resolve

    def deresolve(iri)
      if iri.is_a?(RTM::Locator)
        iri = iri.reference
      elsif iri.is_a?(String)
        iri = strip_identifier(iri)
      else
        raise("iri should be a String or Locator")
      end
      prefixes.each do |identifier, reference|
        if iri.index(reference) == 0 && iri.length > reference.length
          return iri.sub(reference, identifier + ":")
        elsif iri.index(base_iri) == 0
          _iri = iri.sub(base_iri, "")
          return _iri if locator.resolve(_iri) == create_locator(iri)
        end
      end
      return iri
    end

    private

    def strip_identifier(identifier)
      case identifier
      when /^(si:|sl:|ii:|=|\^)$/
        return ""
      when /^(\^|ii:)\s*(.*)/ #identifiers starts with ^ or ii:
        return $2
      when /^(=|sl:)\s*(.+)/ #identifier starts with = or sl:
        return $2
      when /^(si:)\s*(.+)/ #identifier starts with si:
        return $2
      else #identifier does not start with a special character
        return identifier.lstrip #lstrip: leading whitespace chars removed
      end
    end

  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
rtm-0.3.1	lib/rtm/sugar/topic_map/resolve.rb