Redland::MergedModel

# File rdf/redland/model.rb, line 447
def initialize(master_model)
  @hooks = {}
  @count = {}
  @inverse_functional_properties = []
  @identifiers = [] # list of inverse functional properties to smush
  @canonical = {} #rewrites to perform on local level
  @global_rewrites = {} #rewrites to apply globally
  @transactions = []
  @master = master_model
  @pred_identifiers = {}
  super()
  
end

# File rdf/redland/model.rb, line 475
def find_canonical(predlist)
  predlist.each do |pred|
    identifier = {}
    self.find(nil,pred,nil) do |subj,pred,obj|
      master_id = self.find_subject_in_master(pred,obj)
      if not master_id
        if not identifier.has_key?(obj.to_s)
          identifier[obj.to_s] = subj 
        elsif identifier[obj.to_s] != subj #already an identifying URI
          new_value = identifier[obj.to_s]
          if not @canonical.has_key?(subj.to_s)
            @canonical[subj.to_s] = new_value
          end
        end
      else # master_id
        if identifier.has_key?(obj.to_s)
          if identifier[obj.to_s] != master_id
            @canonical[subj.to_s] = master_id
            identifier[obj.to_s] = master_id
          end
        else # master_id not in identifier
          identifier[obj.to_s] = master_id
          if @canonical.has_key?(subj.to_s)
            if @canonical[subj.to_s] != master_id
              @global_rewrites[master_id] = @canonical[subj.to_s]
            end
          else
            if subj != master_id
              @canonical[subj.to_s] = master_id
            end
          end
        end
      end
    end # self.find
    @pred_identifiers[pred] = identifier
  end #predlist.each
end

# File rdf/redland/model.rb, line 463
def find_subject_in_master(pred,obj)
  return @master.subject(pred,obj)
end

# File rdf/redland/model.rb, line 514
def rewrite(context=nil)
  self.triples() do |sub,pred,obj|
    sub = @canonical[sub.to_s] if @canonical.key?(sub.to_s)
    obj = @canonical[obj.to_s] if @canonical.key?(obj.to_s)
    
    
    @master.add(sub,pred,obj,context)
  end
end

# File rdf/redland/model.rb, line 469
def smush(predlist)
  self.find_canonical(predlist)
  self.rewrite()
end