Class: Reddy::Literal::XMLLiteral

Inherits:
Encoding
  • Object
show all
Defined in:
lib/reddy/literal.rb

Instance Attribute Summary

Attributes inherited from Encoding

#value

Instance Method Summary collapse

Methods inherited from Encoding

#==, coerce, float, #hash, #initialize, #inspect, integer, string, the_null_encoding, #to_s, xmlliteral

Constructor Details

This class inherits a constructor from Reddy::Literal::Encoding

Instance Method Details

#compare_contents(a, b, same_lang) ⇒ Object

Compare XMLLiterals

Nokogiri doesn’t do a deep compare of elements

Convert node-sets to hash using ActiveSupport::XmlMini and compare hashes.



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# File 'lib/reddy/literal.rb', line 149

def compare_contents(a, b, same_lang)
  begin
    a_hash = ActiveSupport::XmlMini.parse("<foo>#{a}</foo>")
    b_hash = ActiveSupport::XmlMini.parse("<foo>#{b}</foo>")
    a_hash == b_hash
  rescue
    super
  end
end

#encode_contents(contents, options) ⇒ Object

Map namespaces from context to each top-level element found within node-set



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# File 'lib/reddy/literal.rb', line 173

def encode_contents(contents, options)
  #puts "encode_contents: '#{contents}'"
  if contents.is_a?(String)
    ns_hash = options[:namespaces].values.inject({}) {|h, ns| h.merge(ns.xmlns_hash)}
    ns_strs = []
    ns_hash.each_pair {|a, u| ns_strs << "#{a}=\"#{u}\""}

    # Add inherited namespaces to created root element so that they're inherited to sub-elements
    contents = Nokogiri::XML::Document.parse("<foo #{ns_strs.join(" ")}>#{contents}</foo>").root.children
  end

  # Add already mapped namespaces and language
  @contents = contents.map do |c|
    c = Nokogiri::XML.parse(c.copy(true).to_s) if c.is_a?(LibXML::XML::Node)
    if c.is_a?(Nokogiri::XML::Element)
      # Gather namespaces from self and decendant nodes
      c.traverse do |n|
        ns = n.namespace
        next unless ns
        prefix = ns.prefix ? "xmlns:#{ns.prefix}" : "xmlns"
        c[prefix] = ns.href unless c.namespaces[prefix]
      end
      
      # Add lanuage
      if options[:language] && c["lang"].to_s.empty?
        c["xml:lang"] = options[:language]
      end
    end
    c.to_html
  end.join("")
end

#format_as_n3(content, lang) ⇒ Object 



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# File 'lib/reddy/literal.rb', line 159

def format_as_n3(content, lang)
  "\"#{content.to_s.rdf_escape}\"^^<#{value}>"
end

#format_as_trix(content, lang) ⇒ Object 



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# File 'lib/reddy/literal.rb', line 163

def format_as_trix(content, lang)
  "<typedLiteral datatype=\"#{@value}\">#{content}</typedLiteral>"
end

#xml_args(content, lang) ⇒ Object 



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# File 'lib/reddy/literal.rb', line 167

def xml_args(content, lang)
  hash = {"rdf:parseType" => "Literal"}
  [content, hash]
end