class SPARQL::Algebra::Operator::MD5
The SPARQL
logical `md5` operator.
Returns the MD5
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.
@example
(prefix ((: <http://example.org/>)) (project (?hash) (extend ((?hash (md5 ?l))) (bgp (triple :s1 :str ?l)))))
Constants
- NAME
Public Instance Methods
apply(operand, **options)
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Returns the MD5
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.
@param [RDF::Literal] operand
the operand
@return [RDF::Literal] @raise [TypeError] if the operand is not a simple literal
# File lib/sparql/algebra/operator/md5.rb, line 29 def apply(operand, **options) 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::MD5.new.hexdigest(operand.to_s)) end