class LD::Patch::Algebra::Prefix
The LD
Patch
‘prefix` operator.
@example
(prefix ((: <http://example/>)) (graph ?g (bgp (triple ?s ?p ?o))))
Constants
- NAME
Public Instance Methods
execute(queryable, options = {}, &block)
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Executes this query on the given ‘queryable` graph or repository. Really a pass-through, as this is a syntactic object used for providing context for URIs.
@param [RDF::Queryable] queryable
the graph or repository to query
@param [Hash{Symbol => Object}] options
any additional keyword options
@yield [solution]
each matching solution, statement or boolean
@yieldparam [RDF::Statement, RDF::Query::Solution, Boolean] solution @yieldreturn [void] ignored @return [RDF::Query::Solutions]
the resulting solution sequence
@see www.w3.org/TR/rdf-sparql-query/#sparqlAlgebra
# File lib/ld/patch/algebra/prefix.rb, line 32 def execute(queryable, options = {}, &block) debug(options) {"Prefix"} @solutions = queryable.query(operands.last, **options.merge(depth: options[:depth].to_i + 1), &block) end
optimize()
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Returns an optimized version of this query.
If optimize operands, and if the first two operands are both Queries, replace with the unique sum of the query elements
@return [Union, RDF::Query] ‘self`
# File lib/ld/patch/algebra/prefix.rb, line 44 def optimize operands.last.optimize end