Class: RDF::Literal

Inherits:
Object
  • Object
show all
Includes:
N3::Terminals
Defined in:
lib/rdf/n3/extensions.rb

Constant Summary

Constants included from N3::Terminals

N3::Terminals::ANON, N3::Terminals::BASE, N3::Terminals::BLANK_NODE_LABEL, N3::Terminals::DECIMAL, N3::Terminals::DOUBLE, N3::Terminals::ECHAR, N3::Terminals::ESCAPE_CHAR4, N3::Terminals::ESCAPE_CHAR8, N3::Terminals::EXPONENT, N3::Terminals::INTEGER, N3::Terminals::IPLSTART, N3::Terminals::IRIREF, N3::Terminals::IRI_RANGE, N3::Terminals::LANGTAG, N3::Terminals::PERCENT, N3::Terminals::PLX, N3::Terminals::PNAME_LN, N3::Terminals::PNAME_NS, N3::Terminals::PN_CHARS, N3::Terminals::PN_CHARS_BASE, N3::Terminals::PN_CHARS_BODY, N3::Terminals::PN_CHARS_U, N3::Terminals::PN_LOCAL, N3::Terminals::PN_LOCAL_BODY, N3::Terminals::PN_LOCAL_ESC, N3::Terminals::PN_PREFIX, N3::Terminals::PREFIX, N3::Terminals::QUICK_VAR_NAME, N3::Terminals::STRING_LITERAL_LONG_QUOTE, N3::Terminals::STRING_LITERAL_LONG_SINGLE_QUOTE, N3::Terminals::STRING_LITERAL_QUOTE, N3::Terminals::STRING_LITERAL_SINGLE_QUOTE, N3::Terminals::UCHAR, N3::Terminals::U_CHARS1, N3::Terminals::U_CHARS2, N3::Terminals::WS

Instance Method Summary collapse

Instance Method Details

#as_datetime ⇒ RDF::Literal::DateTime

Parse the value as a dateTime literal, or return now.

Returns:

  • (RDF::Literal::DateTime) 


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# File 'lib/rdf/n3/extensions.rb', line 105

def as_datetime
  return self if is_a?(RDF::Literal::DateTime)
  mvalue = value
  mvalue = "#{mvalue}-01" if mvalue.match?(%r(^\d{4}$))
  mvalue = "#{mvalue}-01" if mvalue.match?(%r(^\d{4}-\d{2}$))
  RDF::Literal::DateTime.new(::DateTime.iso8601(mvalue), lexical: value)
rescue
  RDF::Literal(0)
end

#as_number ⇒ RDF::Literal::Numeric

Parse the value as a numeric literal, or return 0.

Returns:

  • (RDF::Literal::Numeric) 


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# File 'lib/rdf/n3/extensions.rb', line 90

def as_number
  return self if self.is_a?(RDF::Literal::Numeric)
  case value
  when DOUBLE  then RDF::Literal::Double.new(value)
  when DECIMAL then RDF::Literal::Decimal.new(value)
  when INTEGER then RDF::Literal::Integer.new(value)
  else
    RDF::Literal(0)
  end
end