class ActiveFedora::SparqlInsert

def build
  query = deletes(subject).join
  query += "INSERT { \n"
  query +=
    changes.map do |_, result|
      result.map do |statement|
        ::RDF::Query::Pattern.new(subject: pattern_subject(statement.subject), predicate: statement.predicate, object: statement.object).to_s
      end.join("\n")
    end.join("\n")
  query += "\n}\n WHERE { }"
  query
end