Class: SPARQL::Algebra::Operator::SHA256
- Inherits:
-
Unary
- Object
- SPARQL::Algebra::Operator
- Unary
- SPARQL::Algebra::Operator::SHA256
- Includes:
- Evaluatable
- Defined in:
- vendor/bundler/ruby/3.0.0/bundler/gems/sparql-ffa592c8f275/lib/sparql/algebra/operator/sha256.rb
Overview
The SPARQL logical sha256
operator.
Returns the SHA256 checksum, as a hex digit string, calculated on the UTF-8 representation of the simple literal or lexical form of the xsd:string
. Hex digits SHOULD
be in lower case.
Constant Summary collapse
- NAME =
:sha256
Constants inherited from Unary
Constants inherited from SPARQL::Algebra::Operator
Instance Attribute Summary
Attributes inherited from SPARQL::Algebra::Operator
Instance Method Summary collapse
-
#apply(operand) ⇒ RDF::Literal
Returns the SHA256 checksum, as a hex digit string, calculated on the UTF-8 representation of the simple literal or lexical form of the xsd:string.
Methods included from Evaluatable
#evaluate, #memoize, #replace_aggregate!, #replace_vars!
Methods inherited from Unary
Methods inherited from SPARQL::Algebra::Operator
#aggregate?, arity, base_uri, #base_uri, base_uri=, #bind, #boolean, #constant?, #deep_dup, #each_descendant, #eql?, #evaluatable?, evaluate, #executable?, #first_ancestor, for, #formulae, #initialize, #inspect, #ndvars, #node?, #operand, #optimize, #optimize!, #parent, #parent=, #prefixes, prefixes, prefixes=, #rewrite, #to_binary, #to_sxp, #to_sxp_bin, #validate!, #variable?, #vars
Methods included from Expression
cast, #constant?, #evaluate, extension, extensions, for, #invalid?, new, #node?, open, #optimize, #optimize!, parse, register_extension, #to_sxp_bin, #valid?, #validate!, #variable?
Constructor Details
This class inherits a constructor from SPARQL::Algebra::Operator::Unary
Instance Method Details
#apply(operand) ⇒ RDF::Literal
Returns the SHA256 checksum, as a hex digit string, calculated on the UTF-8 representation of the simple literal or lexical form of the xsd:string. Hex digits should be in lower case.
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# File 'vendor/bundler/ruby/3.0.0/bundler/gems/sparql-ffa592c8f275/lib/sparql/algebra/operator/sha256.rb', line 29 def apply(operand) raise TypeError, "expected an RDF::Literal, but got #{operand.inspect}" unless operand.literal? raise TypeError, "expected simple literal or xsd:string, but got #{operand.inspect}" unless (operand.datatype || RDF::XSD.string) == RDF::XSD.string RDF::Literal(Digest::SHA256.new.hexdigest(operand.to_s)) end |