Class: Wongi::Engine::BetaNode

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from CoreExt

included

Constructor Details

#initialize(parent = nil) ⇒ BetaNode

Returns a new instance of BetaNode.



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# File 'lib/wongi-engine/beta/beta_node.rb', line 12

def initialize(parent = nil)
  @parent = parent
  @children = []
  parent.children << self if parent
end

Instance Attribute Details

#children ⇒ Object

Returns the value of attribute children.



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# File 'lib/wongi-engine/beta/beta_node.rb', line 8

def children
  @children
end

#parent ⇒ Wongi::Engine::BetaNode (readonly)

Returns:



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

def parent
  @parent
end

#rete ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 30

def rete
  @rete ||= (parent.rete if parent)
end

Instance Method Details

#assignment_node(variable, body) ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 42

def assignment_node(variable, body)
  node = AssignmentNode.new self, variable, body
  node.refresh
  node
end

#beta_deactivate_children(token: nil, wme: nil, children: self.children) ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 52

def beta_deactivate_children(token: nil, wme: nil, children: self.children)
  children.each do |child|
    child.tokens.select { (token.nil? || _1.child_of?(token)) && (wme.nil? || _1.wme == wme) }.each do |child_token|
      child.beta_deactivate(child_token)
    end
  end
end

#depth ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 22

def depth
  @depth ||= if parent.nil?
               0
             else
               parent.depth + 1
             end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wongi-engine/beta/beta_node.rb', line 82

def empty?
  tokens.first.nil?
end

#overlay ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 78

def overlay
  rete.current_overlay
end

#refresh ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 48

def refresh
  parent.refresh_child self
end

#root? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wongi-engine/beta/beta_node.rb', line 18

def root?
  parent.nil?
end

#size ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 86

def size
  tokens.count
end

#tokens ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 74

def tokens
  overlay.node_tokens(self)
end