Class: OA::Graph

Inherits:
Object
  • Object
show all
Defined in:
lib/triannon/oa_graph_helper.rb

Class Method Summary collapse

Class Method Details

.remove_fedora_triples(graph) ⇒ Object

returns graph without any fedora-specific triples

note that the Fedora vocab is not complete and also doesn't include modeshape



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# File 'lib/triannon/oa_graph_helper.rb', line 25

def self.remove_fedora_triples graph
  if graph && graph.is_a?(RDF::Graph) && graph.count > 0
    no_fedora_graph = RDF::Graph.new
    fedora_props = RDF::Vocab::Fcrepo4.properties.map {|p| p.to_s}
    fedora_ns = "http://fedora.info/definitions"
    modeshape_ns = "http://www.jcp.org/jcr"
     # describable predates Fedora 4.1.1, but just in case ...
    fedora_describable = "http://purl.org/dc/elements/1.1/describable"
    graph.each { |stmt|
      no_fedora_graph << stmt unless fedora_props.include?(stmt.predicate.to_s) ||
                                  fedora_props.include?(stmt.object.to_s) ||
                                  fedora_props.include?(stmt.subject.to_s) ||
                                  stmt.predicate.to_s.match(fedora_ns) ||
                                  stmt.predicate.to_s.match(modeshape_ns) ||
                                  stmt.subject.to_s.match(fedora_ns) ||
                                  stmt.object.to_s.match(fedora_ns) ||
                                  stmt.object.to_s.match(modeshape_ns) ||
                                  stmt.object.to_s == (fedora_describable)
    }
    no_fedora_graph
  else
    graph
  end
end

.remove_ldp_triples(graph) ⇒ Object

returns graph without any LDP-specific triples



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# File 'lib/triannon/oa_graph_helper.rb', line 8

def self.remove_ldp_triples graph
  if graph && graph.is_a?(RDF::Graph) && graph.count > 0
    no_ldp_graph = RDF::Graph.new
    ldp_props = RDF::Vocab::LDP.properties.map {|p| p.to_s}
    graph.each { |stmt|
      no_ldp_graph << stmt unless ldp_props.include?(stmt.predicate.to_s) ||
                                  ldp_props.include?(stmt.object.to_s) ||
                                  ldp_props.include?(stmt.subject.to_s)
    }
    no_ldp_graph
  else
    graph
  end
end