Class: ActiveRDF::ActiveRdfAdapter

Inherits:
Object
  • Object
show all
Defined in:
lib/active_rdf/federation/active_rdf_adapter.rb

Instance Method Summary collapse

Constructor Details

#initialize(params = {}) ⇒ ActiveRdfAdapter

Returns a new instance of ActiveRdfAdapter.



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# File 'lib/active_rdf/federation/active_rdf_adapter.rb', line 10

def initialize(params = {})
  # defaults
  @enabled =                               true
  @reads =                                 true
  @writes =      truefalse(params[:write], true)
  @new =           truefalse(params[:new], false)
  @contexts = truefalse(params[:contexts], false)
end

Instance Method Details

#clear ⇒ Object

Clear the adapter. Crude default implementation, which can be overwritten in subclasses. TODO: This queries all adapters, this may lead to problems…

Raises:



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# File 'lib/active_rdf/federation/active_rdf_adapter.rb', line 26

def clear
  raise(ActiveRdfError, "Can only delete from writing adapters") unless(writes?)
  to_delete = Query.new.select(:s, :p, :o).where(:s, :p, :o).execute
  to_delete.each do |s, p, o|
    delete(s, p, o)
  end
end

#translate(query) ⇒ Object

translate a query to its string representation



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# File 'lib/active_rdf/federation/active_rdf_adapter.rb', line 20

def translate(query)
  Query2SPARQL.translate(query)
end