Class: Redland::Literal

Inherits:
Object
  • Object
show all
Defined in:
lib/owl.rb

Overview

overriding literal to give nice access to datatype and to access the stored value as correct ruby type

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.create(value, type) ⇒ Object 



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# File 'lib/owl.rb', line 13

def self.create(value, type)
  raise "literal datatype may not be nil" unless type
  type = parse_datatype_uri(value) if OpenTox::Owl::PARSE_LITERAL_TYPE==type
  
  if type.is_a?(Redland::Uri)
    Redland::Literal.new(value.to_s,nil,type)
  else
    Redland::Literal.new(value.to_s,nil,Redland::Uri.new(type.to_s))
  end
end

Instance Method Details

#datatype ⇒ Object

the literal node of the ruby swig api provdides the ‘value’ of a literal but not the ‘datatype’ found solution in mailing list



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# File 'lib/owl.rb', line 26

def datatype
  uri = Redland.librdf_node_get_literal_value_datatype_uri(self.node)
  return Redland.librdf_uri_to_string(uri) if uri
end

#get_value ⇒ Object

gets value of literal, value class is se according to literal datatype



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# File 'lib/owl.rb', line 32

def get_value
  Redland::Literal.parse_value( self.value, self.datatype )
end