Class: Pacer::Pipes::VisitorPipe

Inherits:
RubyPipe
  • Object
show all
Defined in:
lib/pacer/pipe/visitor_pipe.rb

Instance Attribute Summary collapse

Attributes inherited from RubyPipe

#starts

Instance Method Summary collapse

Methods inherited from RubyPipe

#enablePath, #setStarts

Constructor Details

#initialize(visitor = nil) ⇒ VisitorPipe

Returns a new instance of VisitorPipe.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 9

def initialize(visitor = nil)
  super()
  self.visitor = visitor if visitor
  @queue          = []
  @in_section = false
end

Instance Attribute Details

#in_section ⇒ Object (readonly)

Returns the value of attribute in_section.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 4

def in_section
  @in_section
end

#queue ⇒ Object (readonly)

Returns the value of attribute queue.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 4

def queue
  @queue
end

#use_after_element ⇒ Object

Returns the value of attribute use_after_element.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 6

def use_after_element
  @use_after_element
end

#use_hasNext ⇒ Object

Returns the value of attribute use_hasNext.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 6

def use_hasNext
  @use_hasNext
end

#use_next ⇒ Object

Returns the value of attribute use_next.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 6

def use_next
  @use_next
end

#use_on_element ⇒ Object

Returns the value of attribute use_on_element.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 6

def use_on_element
  @use_on_element
end

#use_replace_element ⇒ Object

Returns the value of attribute use_replace_element.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 6

def use_replace_element
  @use_replace_element
end

#use_reset ⇒ Object

Returns the value of attribute use_reset.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 6

def use_reset
  @use_reset
end

#visitor ⇒ Object

Returns the value of attribute visitor.



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 4

def visitor
  @visitor
end

Instance Method Details

#processNextStart ⇒ Object 



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 30

def processNextStart
  while true
    visitor.after_element if use_after_element and in_section
    if use_next and (not use_hasNext or visitor.hasNext)
      return visitor.next
    elsif queue.any?
      return queue.shift
    else
      current = starts.next
      @in_section = true unless in_section
      visitor.on_element(current) if use_on_element
      if use_replace_element
        visitor.replace_element(current) do |e|
          queue << e
        end
      else
        return current
      end
    end
  end
rescue EmptyPipe, java.util.NoSuchElementException
  @in_section = false
  raise EmptyPipe.instance
end

#reset ⇒ Object 



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# File 'lib/pacer/pipe/visitor_pipe.rb', line 55

def reset
  visitor.reset if use_reset
  @in_section = false
  @queue = []
  super
end