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Contents
module SPARQL; module Algebra
class Operator
##
# The SPARQL logical `ceil` operator.
#
# [121] BuiltInCall ::= ... 'CEIL' '(' Expression ')'
#
# @example SPARQL Grammar
# PREFIX : <http://example.org/>
# PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
# SELECT ?s ?num (CEIL(?num) AS ?ceil) WHERE {
# ?s :num ?num
# }
#
# @example SSE
# (prefix
# ((: <http://example.org/>)
# (xsd: <http://www.w3.org/2001/XMLSchema#>))
# (project (?s ?num ?ceil)
# (extend ((?ceil (ceil ?num)))
# (bgp (triple ?s :num ?num)))))
#
# @see https://www.w3.org/TR/sparql11-query/#func-ceil
# @see https://www.w3.org/TR/xpath-functions/#func-ceil
class Ceil < Operator::Unary
include Evaluatable
NAME = [:ceil]
##
# Returns the smallest (closest to negative infinity) number with no fractional part that is not less than the value of `arg`. An error is raised if `arg` is not a numeric value.
#
# @param [RDF::Literal] operand
# the operand
# @return [RDF::Literal] literal of same type
# @raise [TypeError] if the operand is not a numeric value
def apply(operand, **options)
case operand
when RDF::Literal::Numeric then operand.ceil
else raise TypeError, "expected an RDF::Literal::Numeric, but got #{operand.inspect}"
end
end
##
#
# Returns a partial SPARQL grammar for this operator.
#
# @return [String]
def to_sparql(**options)
"CEIL(#{operands.to_sparql(**options)})"
end
end # Ceil
end # Operator
end; end # SPARQL::Algebra
Version data entries
8 entries across 8 versions & 1 rubygems