Class: RDF::Literal::Base64Binary

Inherits:
RDF::Literal show all
Defined in:
vendor/bundler/ruby/3.3.0/bundler/gems/rdf-xsd-1663b6f0e598/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

Constants inherited from RDF::Literal

FALSE, TRUE, XSD_STRING, ZERO

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

Constants included from SPARQL::Algebra::Expression

SPARQL::Algebra::Expression::PATTERN_PARENTS

Constants included from Util::Logger

Util::Logger::IOWrapper

Instance Attribute Summary

Attributes inherited from RDF::Literal

#datatype, #direction, #language

Instance Method Summary collapse

Methods inherited from RDF::Literal

#<=>, #==, #as_datetime, #as_number, #compatible?, #comperable_datatype2?, #comperable_datatype?, #datatype?, #direction?, #english?, #eql?, #escape, #hash, #humanize, #inspect, #language?, #literal?, #method_missing, #object, #plain?, #respond_to_missing?, #simple?, #squish, #squish!, #valid_extended?, #validate!, #value, #value_hash

Methods included from Term

#<=>, #==, #aggregate?, #as_datetime, #as_number, #compatible?, #eql?, #escape, #evaluate, #ndvars, #optimize, #sameTerm?, #term?, #terms, #to_base, #to_sparql, #to_term, #vars

Methods included from SPARQL::Algebra::Expression

cast, #constant?, #evaluate, extension, extension?, extensions, for, #invalid?, new, #node?, open, #optimize, #optimize!, parse, register_extension, #to_sxp_bin, #validate!, #variable?

Methods included from Util::Logger

#log_debug, #log_depth, #log_error, #log_fatal, #log_info, #log_recover, #log_recovering?, #log_statistics, #log_warn, #logger

Methods included from Value

#anonymous?, #canonicalize, #constant?, #formula?, #graph?, #inspect, #inspect!, #invalid?, #iri?, #list?, #literal?, #node?, #resource?, #start_with?, #statement?, #term?, #to_ndvar, #to_nquads, #to_ntriples, #to_rdf, #to_term, #type_error, #uri?, #validate!, #variable?

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 


69
70
71
72
73
 
# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-xsd-1663b6f0e598/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

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class RDF::Literal

Instance Method Details

#canonicalize! ⇒ RDF::Literal

Converts this literal into its canonical lexical representation.

Returns:

See Also:



88
89
90
91
 
# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-xsd-1663b6f0e598/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:



79
80
81
 
# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-xsd-1663b6f0e598/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:



98
99
100
101
102
 
# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-xsd-1663b6f0e598/lib/rdf/xsd/binary.rb', line 98

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