class RDF::AllegroGraph::Query::PrologLiteral
A literal value which can be passed as an argument to a Prolog functor.
@see @FunctorExpression
Public Class Methods
new(value)
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Constract a new Prolog literal.
@param [Object] value A Ruby value.
# File lib/rdf/allegro_graph/query/prolog_literal.rb, line 9 def initialize(value) @value = value end
Public Instance Methods
to_s()
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Serialize this literal as a string. We need to be careful about security here: Our callers might try to pass in untrustworthy values without thinking through the consequences, and we want to limit the damage. We assume that all symbols are trustworthy.
@return [String]
# File lib/rdf/allegro_graph/query/prolog_literal.rb, line 19 def to_s case @value when Symbol, Numeric @value.to_s else err = "Don't know how to serialize #{@value.inspect} securely" raise ArgumentError.new(err) end end