Class: RDF::Literal::Base64Binary

Inherits:
RDF::Literal show all
Defined in:
lib/rdf/xsd/binary.rb

Overview

base64Binary represents Base64-encoded arbitrary binary data. The ·value space· of base64Binary is the set of finite-length sequences of binary octets. For base64Binary data the entire binary stream is encoded using the Base64 Alphabet in [RFC 2045].

See Also:

Constant Summary collapse

DATATYPE = 
RDF::XSD.base64Binary

Instance Method Summary collapse

Constructor Details

#initialize(value, datatype: nil, lexical: nil, **options) ⇒ Base64Binary

Returns a new instance of Base64Binary.

Parameters:

  • value (String, Object) —

    If given a string, it will decode it as an object value. Otherwise, it will take the value as the object and encode to retrieve a value

  • options (Hash) —

    a customizable set of options

Options Hash (**options):

  • :lexical (String) — default: nil 


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# File 'lib/rdf/xsd/binary.rb', line 69

def initialize(value, datatype: nil, lexical: nil, **options)
  super(value, datatype: datatype, lexical: lexical)
  @object = value.is_a?(String) ? ::Base64.decode64(value) : value
  canonicalize! unless value.is_a?(String)
end

Instance Method Details

#canonicalize! ⇒ RDF::Literal

Converts this literal into its canonical lexical representation.

Returns:

See Also:



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# File 'lib/rdf/xsd/binary.rb', line 88

def canonicalize!
  @string = ::Base64.encode64(@object)
  self
end

#to_s ⇒ String

Returns the value as a string.

Returns:

  • (String) 


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# File 'lib/rdf/xsd/binary.rb', line 79

def to_s
  @string || @object.to_s
end

#valid? ⇒ Boolean

Returns true if the value adheres to the defined grammar of the datatype.

Returns:

  • (Boolean) 


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# File 'lib/rdf/xsd/binary.rb', line 98

def valid?
  !!Base64.strict_decode64(value.gsub(/\s+/m, ''))
rescue ArgumentError
  false
end