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module RDF::N3::Algebra::Str
# A built-in for replacing characters or sub. takes a list of 3 strings; the first is the input data, the second the old and the third the new string. The object is calculated as the replaced string.
#
# @example
# ("fofof bar", "of", "baz") string:replace "fbazbaz bar"
class Replace < RDF::N3::Algebra::ListOperator
include RDF::N3::Algebra::Builtin
NAME = :strReplace
URI = RDF::N3::Str.replace
##
# @param [RDF::N3::List] list
# @return [RDF::Term]
# @see RDF::N3::ListOperator#evaluate
def resolve(list)
format, *args = list.to_a.map(&:value)
input, old_str, new_str = list.to_a
RDF::Literal(input.to_s.gsub(old_str.to_s, new_str.to_s))
end
##
# Subclasses may override or supplement validate to perform validation on the list subject
#
# @param [RDF::N3::List] list
# @return [Boolean]
def validate(list)
if super && list.length == 3 && list.to_a.all?(&:literal?)
true
else
log_error(NAME) {"list must have exactly three entries: #{list.to_sxp}"}
false
end
end
end
end
Version data entries
4 entries across 4 versions & 1 rubygems