Class: Wongi::Engine::WME

Inherits:
Struct
  • Object
show all
Includes:
CoreExt
Defined in:
lib/wongi-engine/wme.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from CoreExt

included

Constructor Details

#initialize(s, p, o, r = nil) ⇒ WME

Returns a new instance of WME.



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# File 'lib/wongi-engine/wme.rb', line 15

def initialize s, p, o, r = nil

  manual!

  @deleted = false
  @alphas = []
  @generating_tokens = []
  @neg_join_results = []
  @opt_join_results = []

  @rete = r

# TODO: reintroduce Network#import when bringing back RDF support
  super( s, p, o )

end

Instance Attribute Details

#generating_tokens ⇒ Object (readonly)

Returns the value of attribute generating_tokens.



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# File 'lib/wongi-engine/wme.rb', line 9

def generating_tokens
  @generating_tokens
end

#neg_join_results ⇒ Object (readonly)

Returns the value of attribute neg_join_results.



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# File 'lib/wongi-engine/wme.rb', line 10

def neg_join_results
  @neg_join_results
end

#object ⇒ Object

Returns the value of attribute object

Returns:

  • (Object) —

    the current value of object



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# File 'lib/wongi-engine/wme.rb', line 3

def object
  @object
end

#opt_join_results ⇒ Object (readonly)

Returns the value of attribute opt_join_results.



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# File 'lib/wongi-engine/wme.rb', line 10

def opt_join_results
  @opt_join_results
end

#overlay ⇒ Object

Returns the value of attribute overlay.



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# File 'lib/wongi-engine/wme.rb', line 11

def overlay
  @overlay
end

#predicate ⇒ Object

Returns the value of attribute predicate

Returns:

  • (Object) —

    the current value of predicate



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# File 'lib/wongi-engine/wme.rb', line 3

def predicate
  @predicate
end

#rete ⇒ Object (readonly)

Returns the value of attribute rete.



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# File 'lib/wongi-engine/wme.rb', line 7

def rete
  @rete
end

#subject ⇒ Object

Returns the value of attribute subject

Returns:

  • (Object) —

    the current value of subject



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# File 'lib/wongi-engine/wme.rb', line 3

def subject
  @subject
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/wongi-engine/wme.rb', line 46

def == other
  subject == other.subject && predicate == other.predicate && object == other.object
end

#=~(template) ⇒ Object

Raises:



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# File 'lib/wongi-engine/wme.rb', line 50

def =~ template
  raise Wongi::Engine::Error, "Cannot match a WME against a #{template.class}" unless Template === template
  result = match_member( self.subject, template.subject ) & match_member( self.predicate, template.predicate ) & match_member( self.object, template.object )
  if result.match?
    result
  end
end

#dup ⇒ Object 



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# File 'lib/wongi-engine/wme.rb', line 39

def dup
  self.class.new( subject, predicate, object, rete ).tap do |wme|
    wme.overlay = overlay
    wme.manual = self.manual?
  end
end

#generated? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wongi-engine/wme.rb', line 58

def generated?
  !generating_tokens.empty?
end

#hash ⇒ Object 



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# File 'lib/wongi-engine/wme.rb', line 70

def hash
  @hash ||= [subject.hash, predicate.hash, object.hash].hash
end

#import_into(r) ⇒ Object 



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# File 'lib/wongi-engine/wme.rb', line 32

def import_into r
  self.class.new( subject, predicate, object, r ).tap do |wme|
    wme.overlay = overlay
    wme.manual = self.manual?
  end
end

#inspect ⇒ Object 



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# File 'lib/wongi-engine/wme.rb', line 62

def inspect
  "{#{subject.inspect} #{predicate.inspect} #{object.inspect}}"
end

#to_s ⇒ Object 



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# File 'lib/wongi-engine/wme.rb', line 66

def to_s
  inspect
end