Class: FourStore::Store

Inherits:
Object
  • Object
show all
Defined in:
lib/four_store/store.rb

Instance Method Summary collapse

Constructor Details

#initialize(endpoint, options = nil) ⇒ Store

Returns a new instance of Store.



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# File 'lib/four_store/store.rb', line 10

def initialize(endpoint, options = nil)
  raise "4Store SPARQL end-point URI must end by '/sparql/'" if endpoint.split("/sparql/").size != 1
  @endpoint = URI.parse(endpoint)
  @proxy = URI.parse(ENV['HTTP_PROXY']) if ENV['HTTP_PROXY']
  @certificate = options["certificate"] if options
  @key = options["key"] if options
  @softlimit = options["soft-limit"] if options
end

Instance Method Details

#add(graph, turtle) ⇒ Object 



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# File 'lib/four_store/store.rb', line 37

def add(graph, turtle)
  http.start do |h|
    request = Net::HTTP::Post.new((@endpoint.path.split("/sparql/")[0] or "") + "/data/")
    request.set_form_data({
        'graph' => graph,
        'data' => Namespace::to_turtle + turtle,
        'mime-type' => 'application/x-turtle'
    })
    response = h.request(request)
  end
end

#delete(graph) ⇒ Object 



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# File 'lib/four_store/store.rb', line 49

def delete(graph)
  http.start do |h|
    request = Net::HTTP::Delete.new(@endpoint.path + graph)
    response = h.request(request)
  end
end

#load(uri) ⇒ Object 



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# File 'lib/four_store/store.rb', line 56

def load(uri)
  # WARNING - relies on the -U flag being set when running 4s-httpd
  http.start do |h|
    request = Net::HTTP::Post.new((@endpoint.path.split("/sparql/")[0] or "") + "/update/")
    request.set_form_data({
        'update' => "LOAD <#{uri}>"
    })
    response = h.request(request)
  end
end

#select(query) ⇒ Object 



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# File 'lib/four_store/store.rb', line 19

def select(query)
  http.start do |h|
    request = Net::HTTP::Post.new(@endpoint.path)
    request.set_form_data({ 'query' => Namespace::to_sparql + query, 'soft-limit' => @softlimit })
    response = h.request(request)
    parse_sparql_xml_results(response.body)
  end
end

#set(graph, turtle) ⇒ Object 



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# File 'lib/four_store/store.rb', line 28

def set(graph, turtle)
  http.start do |h|
    request = Net::HTTP::Put.new(@endpoint.path + graph)
    request.body = Namespace::to_turtle + turtle
    request.content_type = 'application/x-turtle'
    response = h.request(request)
  end
end